306 THE CANADIAN ENTOMOLOGIST. 



lead one to suppose. Moreover, the larva; of sobrina are quite variable, 

 some being darker, others lighter, as they occurred to me in some twenty- 

 five examples at Monterey, Cal. I found but two larvae oi argent at a at 

 Portland, Or., both being dark in colour, with the yellow hairs reduced as 

 described by Mr. Edwards, so that these characters seem fairly constant. 



Halisidota ( Halisidota) tesselaris, Abb. and Sm. 



Halisidota (Halisidota) harrisii, Walsh. 



I maintain the specific distinctness of these forms, though Mr. Neu- 

 moegen is unwilling to do so, because the moths cannot be superficially 

 distinguished. They inhabit the same territory, so that we cannot have 

 here to do with local races. I have verified the observations of Walsh, 

 and shown some additional differences in the manner of growth of the 

 larvae.* The difference in the male genitalia gives additional weight to 

 my conclusion, though I wish to examine more specimens before I can be 

 sure that these differences are constant. 



Halisidota (Zatrephes) trigona, Grote. 



A specimen of this species, received from Dr. McKnight, shows that 

 I have been mistaken in referring it as a synonym of specularis H. S. 

 I am obliged to Mr. Grote for promptly pointing out the error. Mr. 

 Neumbegen has written out, somewhat at length, the differences between 

 the two species. 



Halisidot.4 (Aemilia) roseata, Walker. 



ciniiamojiea, Boisd. 



significans, Hy. Edw. , 



saiiguivenosa, Neum. 



This pretty little species has proved a pit-fall to more than one 

 describer, as witness the above synonymy. It has been unique in our 

 fauna until the discovery of H. occidentalis. French has given us its close 

 ally. The two differ only in coloration. H. roseata has a wide range, 

 from Sonora (Boisduval) and New Mexico (Hy. Edwards) on the south, 

 through California and the North-western States to British Columbia. 

 Its larva is unknown, bi,it it will probably prove to be a pine feeder. 



Halisidota (?) macularia, Walk.f 



This name awaits identification. It is referred to by Stretch, f but I 

 cannot find it in Kirby's catalogue anywhere among the Phsegopterinae. 

 The description reads like an Ecpantheria. 



* Psyche, VI. 162. 



tCat. Brit. Mus. XXXI. p. 314 (1864). f Ent. Amer. I. 107. 



