THE CANADIAN ENTOMOLOGIST. 



55- 



Bactridium, Lcc. 

 naniim, Lee. 



Nemosoma, Latr. 



cylindricum, Lee. 

 Temnochila, Westw. 



viridicyanea, Lee. 



virescens, Er. 

 Alindria. 



cylindrica, Er. 



teres, Lee. 



DiTOMA, ///. 



quadriguttata, Lee. 

 Synch iTA, Hclkvig. 



granulata, Say. 



nigripennis, Lee. 

 AuLONiUM, Er. 



parallelipipedum, 



IMONOTOMID.^E. 



MONOTUMA, LLbst. 



americanum. Aube. 



TROGOSITID.E. 



Trogosita, Oliv. 



mauritanica, Oliv 

 corticalis, Mels. 

 dubia, Mcls. 

 nana, Mels. 

 castanea, Mels. 

 laticollis, Horn. 

 bimacLilata, Mels. 



COLYDIID^. 



Prolyctus, Zinwi. 



exaratus, Mels. 

 Cerylon, Latr. 



unicolor, Lee. 



castaneum, Say. 



Er. 



A DISSERTATION ON NORTHERN BUTTERFLIES. 



BY WILLIAM COUPER, MONTREAL. 



(Continued from Patre 37). 



The confinement of the genus Chionobas to high latitudes affords an 

 example regarding distribution of species. Their food being lichens 

 peculiar only to the Alpine regions, must confine them within a limited 

 range. Mr. Scudder, in his " Revision of the hitherto kno's\Ti species of 

 the genus Chionobas., of North America " — Proceed. Ent. Soc. Philad., 

 vol. 5, pp. 26-2S — gives them three or four localities ; but these are either 

 arctic, sub-arctic or Alpine. He places them also in Alpine districts — on 



