THE ENTOMOLOGIST. 271 
would appear by the middle of June, and the third in 
August. Ido not even see why there should not be four 
generations, although I admit there is little chance of it in 
our climate. 
In conclusion, I must remark that Ratzeburg has made a 
slip of the pen in stating that the “black-gray smoky wings 
are lightest at the base and darkest at the apex:” it must 
evidently be just the reverse. It is, moreover, somewhat 
singular that, having reared the insect, he makes no mention 
of the male. Can it be that my having reared a brood of 
males is to be regarded as a rare occurrence? It is well 
known that in the case of the sawflies the females occur in 
much preponderating numbers ; even in some not rare species 
the males are to this moment quite unknown. 
Netherland Insects. Translated from the Dutch of CHRISTIAN 
Seppe by Epwin BrrcuaL., Esq. 
(Continued from p. 154.) 
“De KLEINE GESTREEPTE WITJES-VLINDER.” 
The small, striped, white butterfly (Pieris Napi). 
HavineG now before me the task of describing a butterfly of 
the second order, it seems to me best to state something 
beforehand about the character of these insects. In the first 
section, about the butterflies of the first order, I named the 
common character, which all butterflies have in caterpillar 
and pupa, both in the first and second orders; consequently 
it is unnecessary to repeat this in the present chapter; but, 
as I then gave the peculiar character of caterpillar, pupa, and 
fly, of the first order, so now I give herewith the character of 
caterpillar, pupa, and fly, of the second order :— 
(1) The eggs, out of which these insects take their begin- 
ning, have not all the same form: some are longish, and. 
pointed at the upper end, others round; and of these some 
are round like a ball, others round like a plate, some smooth, 
and others rough; in colour they incline to white and 
yellowish chiefly. 
(2) The caterpillars of this order have no spikes, but 
mostly very fine, short hairs. 
