THE CANADIAN ENTOMOLOGIST. 9 



PERIMEDE. 



P. unomaculella. 



It home unomaculella Cham., ante v. 7, /. Q4. 



This species is too near P. erransella Cham, to be separated gen- 

 erically from it. The neuration differs as follows : In the fore wings the 

 median subdivides into four branches instead of into five ; there are like- 

 wise no tufts on the wings and the palpi are perhaps a little shorter. There 

 are no other structural differences, and they resemble each other closely 

 also in ornamentation ; unomaculella is, however, decidedly the smallest, 

 having an alar ex. of only 3^ lines.' Perfectly fresh specimens of both 

 are deep shining brown, but when a little worn they become dingy. 

 Specimens of unomaculella differ as to the amount of white and dark 

 brown on the terminal joint of the palpi ; the antennae are faintly and the 

 tarsi distinctly annulate with whitish. Its position in repose is unknown 

 to me, but P. erransella lays the hind legs along the abdomen and rests on 

 the other two pair, with the face not quite touching the surface on which 

 it reposes, and the hinder part of the body and wings elevated so that it 

 looks as if it stood upon its head. 



&aa ostryceella and Chrysopeleia purpuriella. 



I observe that at /. 72, v. 4, ante, the later generic name is misspelled 

 Chysopeleia. These two species can not be separated generically and are 

 even very closely allied species. The antennae of purpuriella are, loc. cit., 

 described as " sub-pectinate." I meant to write serrated, but those of 

 ostryceella are more distinctly so ; the palpi in the living insect are 

 recurved in both. Aiaa ostryceella, like all the Ostrya-feeding species, is 

 very difficult to rear, because the leaves dry or mould so quickly, so that 

 out of hundreds of gathered mines I have only succeeded in rearing 

 some eight or ten specimens — about equal numbers of both sexes. The 

 generic and specific diagnoses were prepared from three males. The 

 female differs decidedly from the male, and very closely resembles the 

 male of purpuriella. The male of ostryceella is lighter colored and more 

 grayish, with less of the purple lustre than the female, and in the latter 

 pale grayish fasciae are absent. Both are of the same size. Purpuriella 

 is somewhat larger than ostryceella, and though not so strongly tinged with 

 purple as the female of ostryaella, it is decidedly darker. Its food plant 

 is unknown, and certainly its habits of life must differ from those of 



