10 Mimicry among Beetles

It may fairly be expected that if these imitations of one creature by another really serve as a protection to weak and decaying species, instances of the same kind will be found among other groups than the Lepidoptera; and such is the case, although they are seldom so prominent and so easily recognised as those already pointed¹ out as occurring in that order. A few very interesting examples may, however, be pointed out in most of the other orders of insects. The Coleoptera or beetles² that imitate other Coleoptera of distinct groups are very numerous in tropical countries, and they generally follow the laws already laid down as regulating these phenomena⁴. The insects which others imitate always have a special protection, which leads them to be avoided as dangerous or uneatable by small insectivorous animals; some have a disgusting taste (analogous to that of the Heliconid?); others have such a hard and stony⁵ covering that they cannot be crushed or digested; while a third set are very active, and armed with powerful jaws⁶, as well as having some disagreeable secretion⁷. Some species of Eumorphid? and Hispid?, small flat or hemispherical beetles which are exceedingly abundant, and have a disagreeable secretion, are imitated by others of the very distinct group of Longicornes (of which our common musk-beetle³ may be taken as an example). The extraordinary little Cyclopeplus batesii, belongs to the same sub-family of this group as the Onychocerus scorpio and O. concentricus, which have already been adduced as imitating with such wonderful accuracy the bark of the trees they habitually⁸ frequent; but it differs totally in outward appearance from every one of its allies, having taken upon itself the exact shape and colouring of a globular Corynomalus, a little stinking⁹ beetle with clubbed antenn?. It is curious to see how these clubbed antenn? are imitated by an insect belonging to a group with long slender antenn?. The sub-family Anisocerin?, to which Cyclopeplus belongs, is characterised by all its members possessing a little knob or dilatation about the middle of the antenn?. This knob is considerably¹⁰ enlarged in C. batesii, and the terminal portion of the antenn? beyond it is so small and slender as to be scarcely visible, and thus an excellent substitute is obtained for the short clubbed antenn? of the Corynomalus. Erythroplatis corallifer is another curious broad flat beetle, that no one would take for a Longicorn, since it almost exactly resembles Cephalodonta spinipes, one of the commonest of the South American Hispid?; and what is still more remarkable¹¹, another Longicorn of a distinct group, Streptolabis hispoides, was found by Mr. Bates, which resembles the same insect with equal minuteness — a case exactly parallel to that among butterflies, where species of two or three distinct groups mimicked¹³ the same Heliconia. Many of the soft-winged beetles (Malacoderms) are excessively abundant in individuals, and it is probable that they have some similar protection, more especially as other species often strikingly resemble them. A Longicorn beetle, P?ciloderma terminale, found in Jamaica, is coloured exactly in the same way as a Lycus (one of the Malacoderms) from the same island. Eroschema poweri, a Longicorn from Australia, might certainly be taken for one of the same group, and several species from the Malay Islands are equally deceptive¹⁴. In the Island of Celebes I found one of this group, having the whole body and elytra of a rich deep blue colour, with the head only orange; and in company with it an insect of a totally different family (Eucnemid?) with identically the same colouration, and of so nearly the same size and form as to completely puzzle the collector on every fresh occasion of capturing them. I have been recently informed by Mr. Jenner Weir¹⁵, who keeps a variety of small birds, that none of them will touch our common “soldiers and sailors” (species of Malacoderms), thus confirming my belief that they were a protected group, founded on the fact of their being at once very abundant, of conspicuous¹⁶ colours, and the objects of mimicry¹⁷.

There are a number of the larger tropical weevils which have the elytra and the whole covering of the body so hard as to be a great annoyance¹⁸ to the entomologist, because in attempting to transfix them the points of his pins are constantly turned. I have found it necessary in these cases to drill a hole very carefully with the point of a sharp penknife before attempting to insert a pin. Many of the fine long-antenn?d Anthribid? (an allied¹⁹ group) have to be treated in the same way. We can easily understand that after small birds have in vain attempted to eat these insects, they should get to know them by sight, and ever after leave them alone, and it will then be an advantage for other insects which are comparatively soft and eatable, to be mistaken for them. We need not be surprised, therefore, to find that there are many Longicorns which strikingly resemble the “hard beetles” of their own district. In South Brazil, Acanthotritus dorsalis is strikingly like a Curculio of the hard genus Heiliplus, and Mr. Bates assures me that he found Gymnocerus cratosomoides (a Longicorn) on the same tree with a hard Cratosomus (a weevil), which it exactly mimics²⁰. Again, the pretty Longicorn, Phacellocera batesii, mimics one of the hard Anthribid? of the genus Ptychoderes, having long slender antenn?. In the Moluccas we find Cacia anthriboides, a small Longicorn which might be easily mistaken for a very common species of Anthribid? found in the same districts; and the very rare Capnolymma stygium closely imitates the common Mecocerus gazella, which abounded²¹ where it was taken. Doliops curculionoides and other allied Longicorns from the Philippine Islands most curiously²² resemble, both in form and colouring, the brilliant Pachyrhynchi — Curculionid?, which are almost peculiar²³ to that group of islands. The remaining family of Coleoptera most frequently imitated is the Cicindelid?. The rare and curious Longicorn, Collyrodes lacordairei, has exactly the form and colouring of the genus Collyris, while an undescribed species of Heteromera is exactly like a Therates, and was taken running on the trunks of trees, as is the habit of that group. There is one curious example of a Longicorn mimicking²⁴ a Longicorn, like the Papilios and Heliconid? which mimic¹² their own allies. Agnia fasciata, belonging to the sub-family Hypselomin?, and Nemophas grayi, belonging to the Lamiin?, were taken in Amboyna on the same fallen tree at the same time, and were supposed to be the same species till they were more carefully examined, and found to be structurally²⁵ quite different. The colouring of these insects is very remarkable, being rich steel-blue black, crossed by broad hairy bands of orange buff, and out of the many thousands of known species of Longicorns they are probably the only two which are so coloured. The Nemophas grayi is the larger, stronger, and better armed insect, and belongs to a more widely spread and dominant²⁶ group, very rich in species and individuals, and is therefore most probably the subject of mimicry by the other species.

1 pointed   

adj.尖的，直截了当的

参考例句：

• He gave me a very sharp pointed pencil.他给我一支削得非常尖的铅笔。
• She wished to show Mrs.John Dashwood by this pointed invitation to her brother.她想通过对达茨伍德夫人提出直截了当的邀请向她的哥哥表示出来。

2 beetles   

n.甲虫( beetle的名词复数 )

参考例句：

• Beetles bury pellets of dung and lay their eggs within them. 甲壳虫把粪粒埋起来，然后在里面产卵。 来自《简明英汉词典》
• This kind of beetles have hard shell. 这类甲虫有坚硬的外壳。 来自《现代汉英综合大词典》

3 beetle   

n.甲虫，近视眼的人

参考例句：

• A firefly is a type of beetle.萤火虫是一种甲虫。
• He saw a shiny green beetle on a leaf.我看见树叶上有一只闪闪发光的绿色甲虫。

4 phenomena   

n.现象

参考例句：

• Ade couldn't relate the phenomena with any theory he knew.艾德无法用他所知道的任何理论来解释这种现象。
• The object of these experiments was to find the connection,if any,between the two phenomena.这些实验的目的就是探索这两种现象之间的联系，如果存在着任何联系的话。

5 stony   

adj.石头的，多石头的，冷酷的，无情的

参考例句：

• The ground is too dry and stony.这块地太干，而且布满了石头。
• He listened to her story with a stony expression.他带着冷漠的表情听她讲经历。

6 jaws   

n.口部；嘴

参考例句：

• The antelope could not escape the crocodile's gaping jaws. 那只羚羊无法从鱷鱼张开的大口中逃脱。
• The scored jaws of a vise help it bite the work. 台钳上有刻痕的虎钳牙帮助它紧咬住工件。

7 secretion   

n.分泌

参考例句：

• Is there much secretion from your eyes?你眼里的分泌物多吗？
• In addition,excessive secretion of oil,water scarcity are also major factors.除此之外，油脂分泌过盛、缺水也都是主要因素。

8 habitually   

ad.习惯地，通常地

参考例句：

• The pain of the disease caused him habitually to furrow his brow. 病痛使他习惯性地紧皱眉头。
• Habitually obedient to John, I came up to his chair. 我已经习惯于服从约翰，我来到他的椅子跟前。

9 stinking   

adj.臭的，烂醉的，讨厌的v.散发出恶臭( stink的现在分词 )；发臭味；名声臭；糟透

参考例句：

• I was pushed into a filthy, stinking room. 我被推进一间又脏又臭的屋子里。
• Those lousy, stinking ships. It was them that destroyed us. 是的！就是那些该死的蠢猪似的臭飞船！是它们毁了我们。 来自英汉非文学 - 科幻

10 considerably   

adv.极大地；相当大地；在很大程度上

参考例句：

• The economic situation has changed considerably.经济形势已发生了相当大的变化。
• The gap has narrowed considerably.分歧大大缩小了。

11 remarkable   

adj.显著的，异常的，非凡的，值得注意的

参考例句：

• She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。
• These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。

12 mimic   

v.模仿，戏弄；n.模仿他人言行的人

参考例句：

• A parrot can mimic a person's voice.鹦鹉能学人的声音。
• He used to mimic speech peculiarities of another.他过去总是模仿别人讲话的特点。

13 mimicked   

v.（尤指为了逗乐而）模仿( mimic的过去式和过去分词 )；酷似

参考例句：

• He mimicked her upper-class accent. 他模仿她那上流社会的腔调。 来自辞典例句
• The boy mimicked his father's voice and set everyone off laughing. 男孩模仿他父亲的嗓音，使大家都大笑起来。 来自辞典例句

14 deceptive   

adj.骗人的，造成假象的，靠不住的

参考例句：

• His appearance was deceptive.他的外表带有欺骗性。
• The storyline is deceptively simple.故事情节看似简单，其实不然。

15 weir   

n.堰堤，拦河坝

参考例句：

• The discharge from the weir opening should be free.从堰开口处的泻水应畅通。
• Big Weir River,restraining tears,has departed!大堰河，含泪地去了！

16 conspicuous   

adj.明眼的，惹人注目的；炫耀的，摆阔气的

参考例句：

• It is conspicuous that smoking is harmful to health.很明显，抽烟对健康有害。
• Its colouring makes it highly conspicuous.它的色彩使它非常惹人注目。

17 mimicry   

n.（生物）拟态，模仿

参考例句：

• One of his few strengths was his skill at mimicry.他为数不多的强项之一就是善于模仿。
• Language learning usually necessitates conscious mimicry.一般地说，学习语言就要进行有意识的摹仿。

18 annoyance   

n.恼怒，生气，烦恼

参考例句：

• Why do you always take your annoyance out on me?为什么你不高兴时总是对我出气？
• I felt annoyance at being teased.我恼恨别人取笑我。

19 allied   

adj.协约国的；同盟国的

参考例句：

• Britain was allied with the United States many times in history.历史上英国曾多次与美国结盟。
• Allied forces sustained heavy losses in the first few weeks of the campaign.同盟国在最初几周内遭受了巨大的损失。

20 mimics   

n.模仿名人言行的娱乐演员，滑稽剧演员( mimic的名词复数 )；善于模仿的人或物v.（尤指为了逗乐而）模仿( mimic的第三人称单数 )；酷似

参考例句：

• Methods:Models were generate by CT scan,Mimics software and Abaqus software. 方法：采用CT扫描，Mimics软件和Abaqus软件的CAD进行三维有限元模型的创建。 来自互联网
• Relaxing the mind and body mimics the effect that some blood-pressure pills would have. 放松身心会产生某些降压药才能产生的效果。 来自辞典例句

21 abounded   

v.大量存在，充满，富于( abound的过去式和过去分词 )

参考例句：

• Get-rich-quick schemes abounded, and many people lost their savings. “生财之道”遍地皆是，然而许多人一生积攒下来的钱转眼之间付之东流。 来自英汉非文学 - 政府文件
• Shoppers thronged the sidewalks. Olivedrab and navy-blue uniforms abounded. 人行道上逛商店的人摩肩接踵，身着草绿色和海军蓝军装的军人比比皆是。 来自辞典例句

22 curiously   

adv.有求知欲地；好问地；奇特地

参考例句：

• He looked curiously at the people.他好奇地看着那些人。
• He took long stealthy strides. His hands were curiously cold.他迈着悄没声息的大步。他的双手出奇地冷。

23 peculiar   

adj.古怪的，异常的；特殊的，特有的

参考例句：

• He walks in a peculiar fashion.他走路的样子很奇特。
• He looked at me with a very peculiar expression.他用一种很奇怪的表情看着我。

24 mimicking   

v.（尤指为了逗乐而）模仿( mimic的现在分词 )；酷似

参考例句：

• She's always mimicking the teachers. 她总喜欢模仿老师的言谈举止。
• The boy made us all laugh by mimicking the teacher's voice. 这男孩模仿老师的声音，逗得我们大家都笑了。 来自辞典例句

25 structurally   

在结构上

参考例句：

• The house roof was (structurally) unsound. 这屋顶（结构）不牢固。
• Pinhole on shot-hole damage is never structurally significant. 针孔和蛀洞所造成的危害对结构的影响不大。

26 dominant   

adj.支配的，统治的；占优势的；显性的；n.主因，要素，主要的人(或物)；显性基因

参考例句：

• The British were formerly dominant in India.英国人从前统治印度。
• She was a dominant figure in the French film industry.她在法国电影界是个举足轻重的人物。