18 ENTOMOLOGICAL SOCIETY 



Mr. E. S. G. Titus, of the Division of Entomology, U. S. 

 Department of Agriculture, was elected an active member of the 

 Society. 



Dr. Dyar exhibited moths and larvae of three species of 

 Diacrisia (formerly Antarctia], and presented for publication 

 the following : 



NOTE ON THE DISTRIBUTION OF THE RED FORMS OF 



DIACRISIA. 



By HARRISON G. DYAR. 



We have recognized, heretofore two species of Diacrisia from 

 the West, rubra Neumcegen and vagans Boisduval. There ex 

 ists a third in the mountains about Kootenay Lake, which I would 

 distinguish as D '. kasloa in the following synoptic form : 



(^ smaller than 9 the wings thinly scaled and somewhat transparent. 



(^ blackish or red, 9 brownish red, hind wings dark rubra. 



(^ as large as 9> the wings thickly scaled. 



$ light mouse gray or blackish; 9 re ^ brown vag-ans. 



cf and 9 alike, bright red kasloa. 



Diacrisia kasloa, n. sp. 



$ with the thorax and fore wings dark red brown to bright crimson, 

 marked by a few dusky scales, indicating discal dot and outer line; hind 

 wings black, veins and fringe more or less broadly reddish. 



9 deep crimson, the fore wings scarcely marked ; hind wings black on 

 basal five-sixths or the black reduced to discal dot, broken submarginal 

 band and shading along inner margin. Size and shape of vagans. 



D. vagans occurs in California and extends much to the East. I 

 have typical examples from Rossland, B. C., not very far from 

 Kootenay Lake. At Kaslo, on the lake, however, all the specimens 

 are of the bright red form. JD. rubra occupies the northern 

 Pacific Coast region and extends as far as Mount Hood, Oregon. 

 It may prove that the three forms are but "geographical races of 

 one species, though they certainly appear distinct, and must be 

 kept separate for the present at least. The larvae of kasloa were 

 obtained by me at Kaslo, B. C. ; those of rubra were bred from 

 eggs kindly sent by Rev. G. W. Taylor from Wellington, B. C. 

 They are alike. .Stretch's description of the c? vagans larva 

 differs in being darker, the dorsal warts and hairs blackish instead 

 of brown ; his 9 larva appears to correspond with the larvae 

 before us. I failed to observe this curious sexual difference in 

 color in the larvae of rubra. Possibly my larvae are all females. 

 I had forgotten Stretch's observation, so that I did not direct my 



