1864.] • 585 



white, filmy texture, and had the same diaphragm at tip as in S. stro- 

 hlloidcs. On March 6 the galls still contained the insect in the larva 

 state. 



Pupa — April 28 and May 12 1 found four living pupae iu these 

 galls. They differed structurally in no respect from those of the pre- 

 ceding species, and vrere nearly as long as the cocoon and not far short 

 of the length of the gall. The abdomen was dark blood-red, generally 

 tinged and marked with fuscous, the other part of the body, including 

 the wing-cases and legs, blackish, except the thoracic bristles, which 

 were in one specimen noticed to be whitish. One of these four developed 

 into the imago an hour after the description was taken. Length (4 

 dried specimens) .12 — .13 inch. The pupal integument (3 specimens) 

 is whitish, immaculate. On opening 20 — 30 galls May 13, from which 

 I had attempted to breed the imago, I found dead pupse in all of them 



Imago. C. s. gnaphalioides, n. sp. 9 . — Differs from S. hrassi- 

 coides 9 only in the size being slightly smaller and the hair of the tho- 

 rax whitish not blackish, and in the lateral sub-terminal hairs on the 

 joints of the abdomen being perhaps a little longer than is usual in that 

 species. The halteres are almost entirely pale ; and the legs are as 

 pale as in the palest C. s. brassicoides, and perhaps slightly more whit- 

 ish. From S. sirobiloides 9 it difi'ers in the size being slightly smaller 

 and in the origin of the anterior branch of the 3rd longitudinal vein 

 being pretty distinct ; from S- rhodoldcs 9 only in the size being 

 slightly smaller ; and from S. siliqua 9 in the legs and the hair of 

 the thorax being rather whiter, and also, as in the preceding three, 

 in the size being slightly smaller. Length 9 ( including oviduct) 

 .12 — .15 inch ; wing 9 -12 — .16 inch. Three 9 ; % unknown. Ap- 

 peared April 23 — May 6. One of the above 9 9 '^^^ immature, and 

 when recent had the abdomen sanguineous, the medial J of the dorsum 

 of each joint covered with pale brown hair, and no lateral subterminal 

 white hairs; the venter was covered with short, appressed, white hair. 

 Another 9 • which I had kept alive and exposed to the light for 2 days, 

 had when recent the medial f of the dorsal joints of the abdomen deep 

 brown, the other part bright sanguineous, and the venter sanguineous 

 with short, appressed, white hairs. In this specimen, even when dried, 

 the lateral white hairs of the dorsal joints of the abdomen are pretty 

 obvious. 



