STATE AGRICULTURAL SOCIETY. i63 



BUTTERNUT. LlilBS. 



to 0.30. The bark of old trees will sometimes be found every- 

 where tilled with these grubs, which in the month of June may 

 be seen changed to short thick pale-yellow pupse with a few per- 

 fect insects that are newly hatched and have not yet left the tree. 



188. Butternut bark-louse, Aspidiotus Juglandis, Fitch. (Ilomoptera. 

 Coccidae.) 



Fixed to the bark of the twigs, minute pale brownish scales 

 resembling those of the Apple bark louse No. 15, but smaller and 

 not curved. This species was alluded to in my first report, 

 Transactions of 1854, p. 739. I have not yet had an opportunity 

 to trace out its history. Although this is so minute that the 

 naked eye can scarcely discern many of the scales, it is preyed 

 upon by a parasitic larva still smaller, which resides under the 

 scale and feeds upon the eggs which the scale covers, changing to 

 a minute four-winged fly of the family Chalcidida, in the order 

 Hymenoptera, wliich gnaws a small round hole in the side of the 

 scale through which to make its escape. 



189. Butternut scale insect, Lecanium Juglandifex, new species. (Ilo- 

 moptera. Coccidae.) 



Adhering to the bark on the under side of tae limbs, a hemis- 

 pheric dull yellowish or black scale about 0.22 long and 0.18 

 broad, notched at its hind end, frequently showing a paler stripe 

 along its middle and a paler margin and transverse blackish bands. 



Whether this is the same insect with the European Lecanium 

 Juglandis of Bouche, I am unable to ascertain, as I have at hand 

 no description of that species. The details which I herewitli pre- 

 sent of our American insect will probably suffice to enable those 

 who have an opportunity of observing that species to determine 

 whether it is the same. 



The male pupae of this insect may be seen upon the limbs in 

 Mhv. They ai)pear the same with the pupfe of other C(»mmon 

 gl)ecies of this genus, being oblonc: oval, moderately elevated 

 wliite scales al>out 0.10 long and lialf as ])roa(l, tliin and some- 

 wliat hyaline, with a slender snow-white line running lengthwise 

 along each side of the niidflle and uniting at their hind ends, with 

 a similar line running tr^nsverseiv across the scale half wav be- 

 tween its middl<'and its hind end. The male insects come out 



