268 [November, 



39a (39) Intei'iiiediato tibiti.' with a calcar, basal jjortion of second ventral segment 

 normal. 



40 (41) Second dorsal segment in dorsal aspect raised in a conical-tuberculate 



form at about one quarter of its length from the base... 



O. pterophaennes, Perk. 



41 (40) Second dorsal segment only convex above in dorsal aspect, not of conical- 



tuberculate form. Species with surface duller than in 40. 



42 (43) Depression of second ventral segment wider and shallower, ? with the 



scutellum much more feebly punctured than the mesothorax... 



O. dubiosus, Sm. 



43 (42) Depression of second ventral segment narrower and deeper, $ with the 



scutellum differing little from the mesothorax in its punctures... 



O. threnodes, Perk. 



This table will enable any one to distinguish with ease any of the 

 27 species, excepting perhaps O. pseudochromus from O. leiodemas 

 and 0. threnodes from O. duhiosus, where the distinctive characters 

 are of degi'ee only. AVith specimens of each for comparison their 

 separation is perfectly easy. O. lithopliilus is a singularly variable 

 species in puncturation and otherwise, and may possibly become a 

 synonym of the unique O. acoelogaster, described by me. The type 

 of O. natctarjim, de Sauss., appears to be lost, but 1 have no doubt a 

 series of specimens I have taken on Oabu belong to that species, 

 although 8aussure's description is not quite accurate. 



Honolulu : Jtdt/ 2nd, 19Ul. 



CUEIOUS EXPERIENCE WITH LA8I0CAMPA QUERCUS: SEQUEL. 

 BY EDWARD ANDREWS. 



In the May issue of this Magazine {ante pp. 124 — 126) I gave an account of a 

 brood of L. quercus which I succeeded in rearing through the winter ; the first larva 

 spinning up on December 15th, and the first imago emerging about February 23rd. 

 A couple out of this brood paired in the middle of March, and from them I have since 

 reared another brood. The seasons, which are usually followed by this species, have 

 thus been lost ; the food has also been somewhat changed, and the period of their 

 lives considerably shortened. I have, in fact, as nearly as possible produced two 

 broods within the time allotted by our English climate for only one. 



The eggs of this second brood, after lying dormant for six weeks, iiatched at 

 the end of April. I fed the larva? during their first stage on oak, and during their 

 succeeding stages on willow ; they developed rapidly, the first one spinning up about 

 July 15th, and the first imago emerging about August 24tli. By comparing the 

 span of their existence with that of the winter brood, and also by comparing it with 



