146 THE CANADIAN ENTOMOLOGIST. 



noted as "occurring everywhere." Recent collectors, however, report it as 

 scarce. While in New York in December last. Dr. Fletcher compared the 

 specimen figured, with the type of superha in the American Museum of 

 Natural History. Dr. Dyar in his list places superba as a variety of 

 JVevade?isis, and in a recent paper* describes the larva as follows : 

 " Head shining black, labrum yellowish, antennae pale, pinkish at base ; 

 width 3.3 mm. Body black, thoracic feet black, the abdominal ones 

 pinkish, pale. Warts large, normal, arctiiform, i. and ii. with shining bases, 

 i. over half as large as ii., which is elongate. Hair abundant, bristly, 

 sparsely barbuled, rather short before, long on joints 12 and 13 ; most of 

 the hair from wart i. and a few on the sides of ii. are yellow, below this 

 jet-black mixed with white, mostly white from warts iv. to vi. Warts iii. 

 orange, the rest black. A light yellow dorsal line, broken into three 

 spots on each segment, distinct, most of them lanceolate ; a line on joints 

 2 and 3 ; no shields ; joint 2 with little warts, normal. A variety had the 

 dorsal line nearly obsolete, composed of a few dots ; wart iii. black like 

 others. Hairs nearly all yellow, only a few black ones mixed ; some 

 longer white ones postefiorly." To this description is added '• I think, 

 however, that this is the larva of A. inco?-ri{pia, of which I have only 

 males." 



It is to be hoped that British Columbian collectors will endeavor to 

 work out the complete life-history of this interesting form. The moths 

 may be much commoner than we imagine. Many of our western Arctians 

 run very close together, and large series of the moths should be bred 

 from eggs, with the female which laid them correctly associated. 



Distribution. — Victoria, B. C. July 9, 11 (Anderson); Hampson 

 gives Eraser R. (St. John) and Vancouver Island as localities for this 

 msect. 



14. W1LLIAM.SI1, var. DETERMiNATA. — Specimens of the typical form 

 of ^. Wi/liamsii, Dodge, must be very rare. All the specimens we have, 

 and those which have been loaned by correspondents, have proved to be 

 the variety dderminata. Dr. Fletcher submitted a good series of the 

 moths to Dr. Dyar, who named them all detcrminata. This form is 

 reported as the commonest Arctian in Manitoba and the Northwest. Dr. 

 Fletcher has collected numbers of specimens, and Mr. F. H. Wolley-Dod, 

 of Millarville, Alta.,* rej^orls that determinata is " apparently the most 



*Proc. U. S. Nat. Museum, NUl. X.W'., 1902, \>. },~i 



