7 Mimicry

It has been long known to entomologists that certain insects bear a strange external resemblance to others belonging to distinct genera, families, or even orders, and with which they have no real affinity¹ whatever. The fact, however, appears to have been generally considered as dependent upon some unknown law of “analogy”— some “system of nature,” or “general plan,” which had guided the Creator in designing the myriads² of insect forms, and which we could never hope to understand. In only one case does it appear that the resemblance was thought to be useful, and to have been designed as a means to a definite and intelligible³ purpose. The flies of the genus Volucella enter the nests of bees to deposit their eggs, so that their larv? may feed upon the larv? of the bees, and these flies are each wonderfully like the bee on which it is parasitic⁴. Kirby and Spence believed that this resemblance or “mimicry⁵” was for the express purpose of protecting the flies from the attacks of the bees, and the connection is so evident that it was hardly possible to avoid this conclusion. The resemblance, however, of moths⁶ to butterflies or to bees, of beetles⁷ to wasps⁸, and of locusts⁹ to beetles, has been many times noticed by eminent¹⁰ writers; but scarcely ever till within the last few years does it appear to have been considered that these resemblances had any special purpose, or were of any direct benefit to the insects themselves. In this respect they were looked upon as accidental, as instances of the “curious analogies” in nature which must be wondered at but which could not be explained. Recently, however, these instances have been greatly multiplied; the nature of the resemblances has been more carefully studied, and it has been found that they are often carried out into such details as almost to imply a purpose of deceiving the observer. The phenomena¹¹, moreover, have been shown to follow certain definite laws, which again all indicate their dependence¹² on the more general law of the “survival of the fittest,” or “the preservation¹³ of favoured races in the struggle for life.” It will, perhaps, be as well here to state what these laws or general conclusions are, and then to give some account of the facts which support them.

The first law is, that in an overwhelming majority of cases of mimicry, the animals (or the groups) which resemble each other inhabit the same country, the same district, and in most cases are to be found together on the very same spot.

The second law is, that these resemblances are not indiscriminate, but are limited to certain groups, which in every case are abundant in species and individuals, and can often be ascertained¹⁴ to have some special protection.

The third law is, that the species which resemble or “mimic” these dominant¹⁵ groups, are comparatively less abundant in individuals, and are often very rare.

These laws will be found to hold good, in all the cases of true mimicry among various classes of animals to which we have now to call the attention of our readers.

1 affinity   

n.亲和力，密切关系

参考例句：

• I felt a great affinity with the people of the Highlands.我被苏格兰高地人民深深地吸引。
• It's important that you share an affinity with your husband.和丈夫有共同的爱好是十分重要的。

2 myriads   

n.无数，极大数量( myriad的名词复数 )

参考例句：

• Each galaxy contains myriads of stars. 每一星系都有无数的恒星。 来自《简明英汉词典》
• The sky was set with myriads of stars. 无数星星点缀着夜空。 来自《现代英汉综合大词典》

3 intelligible   

adj.可理解的，明白易懂的，清楚的

参考例句：

• This report would be intelligible only to an expert in computing.只有计算机运算专家才能看懂这份报告。
• His argument was barely intelligible.他的论点不易理解。

4 parasitic   

adj.寄生的

参考例句：

• Will global warming mean the spread of tropical parasitic diseases?全球变暖是否意味着热带寄生虫病会蔓延呢？
• By definition,this way of life is parasitic.从其含义来说，这是种寄生虫的生活方式。

5 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。

6 moths   

n.蛾( moth的名词复数 )

参考例句：

• The moths have eaten holes in my wool coat. 蛀虫将我的羊毛衫蛀蚀了几个小洞。 来自《简明英汉词典》
• The moths tapped and blurred at the window screen. 飞蛾在窗帘上跳来跳去，弄上了许多污点。 来自《现代英汉综合大词典》

7 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》

8 wasps   

黄蜂( wasp的名词复数 )； 胡蜂； 易动怒的人； 刻毒的人

参考例句：

• There's a wasps' nest in that old tree. 那棵老树上有一个黄蜂巢。
• We live in dread not only of unpleasant insects like spiders or wasps, but of quite harmless ones like moths. 我们不仅生活在对象蜘蛛或黄蜂这样的小虫的惧怕中，而且生活在对诸如飞蛾这样无害昆虫的惧怕中

9 locusts   

n.蝗虫( locust的名词复数 )；贪吃的人；破坏者；槐树

参考例句：

• a swarm of locusts 一大群蝗虫
• In no time the locusts came down and started eating everything. 很快蝗虫就飞落下来开始吃东西，什么都吃。 来自《简明英汉词典》

10 eminent   

adj.显赫的，杰出的，有名的，优良的

参考例句：

• We are expecting the arrival of an eminent scientist.我们正期待一位著名科学家的来访。
• He is an eminent citizen of China.他是一个杰出的中国公民。

11 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。

12 dependence   

n.依靠，依赖；信任，信赖；隶属

参考例句：

• Doctors keep trying to break her dependence of the drug.医生们尽力使她戒除毒瘾。
• He was freed from financial dependence on his parents.他在经济上摆脱了对父母的依赖。

13 preservation   

n.保护，维护，保存，保留，保持

参考例句：

• The police are responsible for the preservation of law and order.警察负责维持法律与秩序。
• The picture is in an excellent state of preservation.这幅画保存得极为完好。

14 ascertained   

v.弄清，确定，查明( ascertain的过去式和过去分词 )

参考例句：

• The previously unidentified objects have now been definitely ascertained as being satellites. 原来所说的不明飞行物现在已证实是卫星。 来自《简明英汉词典》
• I ascertained that she was dead. 我断定她已经死了。 来自《简明英汉词典》

15 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。