GRAPTA III. 



ored process, sliort, thick at base and top, the sides concave, entUng iu six e({iial 

 spurs, one upright, the others surroiuiding it, each spur witli a short bristle at its 

 extremity ; whole face much tuberculated, the sides especially bt>ing furnished 

 with several long single conical light colored spin's, and mauv stout hairs 

 (Fig. a). 



Chrysalis. — Length, .'.J inch.; greatest breadth across abdomen, .20 inch.; 

 across base of wings, .2S inch. Cylindrical, slender ; the head-case high ; com- 

 pressed transversely, rounded ; at each vertex a stout roumled process, tapering to 

 a Idtnit point, bent inward at two thirds its length, and at the bend on outer 

 side projecting a very .■^hort conical branch; the space between these processes 

 circular ; niesonotnm large, followed by a deep excavation, the sides somewhat 

 flattened, the keel high, thin, rounded anteiiorly, Init at posterior end sharp and 

 truncated ; the wing-cases much elevated, tiaring at ba.se, the sides excavated ; 

 on the marginal border on ventral side a sharp conical protuberance ; on the 

 abdomen several rows of tubercles, most of which arc small, but those of the 

 two yeutral rows are large, and some c^uite prominent; those below the mesono- 

 tum gilded or silvered; color glossy light brown, or drab, the wilig-cases clouded 

 (Fig. b. 6.,). 



liusticus was descrilied originally from examples sent me by Mr. Henry 

 Edwards, and the localities siven were Bit;- Trees, Cal., and Vancouver's 

 Island. In 1878, Mr. Mead took the butterfly at Yo Semite, and, IGth June, 

 found nine caterpillars feeding on Azalea occidentalis, some of which he raised to 

 the imago. From one of these larvie and a chrysalis in alcohol, and a blown 

 laryal skin, assisted by Mr. Mead's written descriptions, the figures on the Plate 

 have been drawn. The larva and chrysalis of this species, from drawings from 

 life by Mr. Stretch, are figiu-ed in Vol. I., i'late 40, and are there erroneously at- 

 tributed to Zephyrus, as 1 learned long after publication. That larva was also 

 taken at Yo Semite, on Azalea occidentalis, and it produced the aberrant female 

 (possibly a dimorphic form) which I described in 1874 as Sllvais. These mistakes 

 I am happily able to rectify, by the kindness of Mr. Mead, than whom we have 

 no more accurate observer or skillful collector among our lepidopterists. 



Mr. Mead was also successful in finding and rearing many larviv of both Zephy- 

 7'us and Scityrns, and states that this last species shows great variation in the 

 relative extent of the light and dark markings, after the manner of the larva of 

 G. Comma, with the likeness to which he was struck, and that Figure 4, Plate 40. 

 Vol. I., resembles one phase of it. As stated in the accompanying notes, Mr. 

 Edwards found four of these larvae on Urtica, and he wrote me that the coloration 



