AMERICAN IIOMOITERA. 395 



the middle. Anterior margin with short wliitish streaks from near the base to 

 the apex where they are most distinct. A diffuse rounded dark brown patch in 

 the outer third of the wing is filled in with blackish scales. Fringes dark, 

 blackish. Posterior wings above grey anteriorly, posteriorly bluish-black; 

 beneath blackish with a greyish center. Under surface of thorax and legs 

 clothed with whitish scales. Expanse .52 inch; length of body .23 inch. Two 

 male specimens bred. 



Parasites of the gaU-lke. — The larvoe of certain Syrphidas were fre- 

 quently found especially in the larger galls; none were bred to matu- 

 rity. The larva; of two species of Lf^ncopix were also found feeding 

 upon the young lice; one species, which was white or yellowish-white, 

 sometimes as many as fifty were found in one gall; the other species 

 was red and quite similar to the new species of LcaropiH I bred from 

 the '' grape-leaf louse" (^Frart. Entom. ii, 17), and which has since 

 been described by Dr. Loew, under the name of simplex. Two unknown 

 species of Chalcis-flies were also bred. 



From the inmates of some of the galls I also bred a species of Ceci- 

 r/o?»y<Vf, having the following characters : — Body fuscous, pubescent; 

 anterior part of abdomen imperfectly banded with black; antennje 

 reddish, covered with grey hairs ; wings light fawn color, spotted with 

 ilusky, the spots arranged in little arcs, forming three broken bands ; 

 femora reddish; tibiic banded with black and white; halteres reddish, 

 on a white pedicel. Length of body one-sixteenth of an inch. Should 

 this species prove to be new, it may be called C. cossse. 



In support of the assertion made on page 393, concerning Carya 

 glabra and amara, the following observations are here added : 



In October, 1868, after examining with great care, the fruit of the hickories in 

 the region of Mt. Carroll, I became convinced that besides Carya alba, we only 

 have in this place C. amara. I have had an of)portunity of examining these 

 hickories in this and some adjoining counties, and find no nut that agrees with 

 glabra. I had been long aware, both from reports of mechanics and from })er- 

 sonal observation, that the young hickory sajiling here is not so tough for hoop» 

 and withes as those in Pennsylvania, where the true pignut hickory is abun- 

 dant; but the nut itself is the best guide to correct determination. 



The kernel of the nut of C. amara is always quite bitter, and much corruga- 

 ted, shell so thin that it is easily broken with the teeth, and I have broken th* 

 whole nut with my hand ; any of them can easily be cut in halves witli a knife. 

 and then readily crushed in pieces with the fingers. The stigmatic extremity 

 usually projects into a long sharp spine; husk thin and leathery-like, soft, split 

 from the apex only about half way to the base ; 3 to 5, usually only 4, promi- 

 nent hinged sutures at the upper end ; this last character is not persistent, but 

 gradually disappears in a series of specimens, so as to be entirely absent in the 

 nuts of some trees. The form of the nut varies between cordate and oblong- 

 elipsoidal ; leaflets 7 — 9 — 1 1 ; bark at first smooth, but as the tree grows older it> 



