On the Variation of Species With Especial Reference to the Insecta Followed B

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On the Variation of Species With Especial Reference to the Insecta Followed B
Thomas Vernon Wollaston
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" In like manner, the Cimex apterus, Linn, (one of the * Introduction to the Modern Classification of Insects, ii. P. 466. T Id. Ii. P. 469. T Id. Ii. P. 454.
101, ,, :, ... > Lygaida) " exhibits, in an eminent J degr*ee; the" orclmary" occurrence of an imperfect perfect-state; whilst indi- viduals are occasionally found with fully developed organs of flight*". Lyceus brevipennis, Lat. , also ordinarily occurs with abbreviated hemelytra; but it has been found with them perfect by Westwood, as w
...ell as with metathoracic wings.
None of the above examples however would appear to do more than refer to the alary instability of the Insecta, as a matter of fact ; but this is all for which we are now contending, the preceding chapter having been in part devoted to some of the presumptive causes of it. Whether the specimens of Oncocephalus griseus, to which Spinola called attention, were insular ones, I cannot say ; but he seems to have noted an example in which an opposite phenomenon to those which Mr.


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