THE CAJ^ADI^N ENTOMOLOGIST. 131 



« 



backwards into a sickle shape, giving the pupa a remarkable appearance.'' 

 Mr. F. X. Williams has kindly given me a pupa, with a description of the 

 larva, of a species of Euchloe, and as the latter agrees so well with Mead's, 

 and the pupa differs so radically from that oi sara and atisonides (both of 

 which are known to me), I have no hesitation in referring the species to 

 lanceolata. The curvature of the anterior portion of the chrysalis is 

 especially distinctive, and for this reason it can hardly be confused with 

 either of the other species found in the same region. Mead says of this : 

 '^ In many particulars the pupa is not unlike that of Terias tiicippe, and I 

 believe that this species is the nearest to Terias of all our Anthocharis." 

 Besides the specimen given me, Mr. Williams has three or four others, 

 taken towards the middle of July in Shasta county, California, at an 

 elevation of about 2,000 feet. Careful breeding will probably eliminate a 

 number of our so-called species and varieties. Stella, thoosa, julia and 

 flora are probably synonyms of Reakirtii, Edw., and mollis, Wright, is the 

 same as sara, Boisd. Lajiceolata is a very distinct species. 



Chrysalis. J — Navicular, cylindrical, slender, the palpi-case much 

 curved, more so than in any species known to me, giving the pupa a semi- 

 lunar appearance; thickest in the middle and tapering gradually therefrom 

 to the extremities ; anterior end sharper than posterior, colour at first 

 green, changing to a very light wood-brown, very faintly streaked, and 

 with a few scattered black points ; tip of palpi-case somewhat blackish ; a 

 narrow median ventral line somewhat darker than the ground colour ; 

 lateral ridges concolorous ; incisures of segments whitish. Length, 19 

 mm.; width, about 5 mm. 



Lanceolata is one of the first species to appear in the mountains, 

 where it ranges. Like others of the genus, it varies considerably, 

 especially in the density of the apical coloration and the size and form of 

 the discal bar. Northern specimens differ from southern in having the 

 auroral spot lighter, both above and below. La?iceolata ranges from 

 Mexico to Alaska, and is essentially a mountain flyer. The food-plants 

 are various species of Cruciferae, particularly Arabis pej-foliata, Turritis 

 glabra and Erysimujn offici?iale. 



JThe pupse of Euchloe seem to be very variable as to colour, and also the 

 deg-ree of curvature of the anterior portion. Mr. Williams tells me, however, 

 that his pupa; are quite uniform. In E. aiisonides the chrysalis varies greatly in 

 the colour of the longitudinal stripes, and the tip of the palpi-case may be recurved 

 to a noticeable extent in some specimens, while in others the curve is only 

 moderate. 



