LARVA, LAST INSTAR. Closely resembles the larva of E. 

 chalcedon. 



Head: black, covered with numerous stubby black hairs. 



Body: longitudinally striated alternate black and creamy- 

 white, — the whitish striations being interrupted with blotches of 

 yellow at the base of spines. These lighter colored bands are five 

 in number, — one placed dorsally, two laterally, and two latero- 

 inferiorly. The body is covered with many branching spines. 

 Those which arise from the area of the dorsal cream-colored stripe 

 are yellow, with the exception of a single caudally placed one, 

 which is black. A short latero-inferior series of spines on each 

 side are also yellow. All the remaining spines are black. 



First Segment: contains a number of stubby hairs and two 

 short laterally placed spines. 



Second and Third Segments: eight spines, the two most lat- 

 erally placed yellow, — the remainder black. There is no mid- 

 dorsal spine. 



Fourth to Eleventh Segments: nine spines, the mid-dorsal 

 series and the latero-inferior series yellow, — the remainder black. 



Caudal Segments: spines are reduced in number and size. All 

 are black. 



Legs: black. Abdomen: greyish white, with an indistinct 

 dark median line. 



PUPA. Length 18 mm. Greatest width through 5th abdom- 

 inal segment on a lateral axis, 6 mm. Through 5th segment on a 

 dorso-ventral axis, 7 mm. Very similar in general appearance to 

 our common E. chalcedon. 



Ground Color: silvery white, changing to a grey-green. Over 

 this are scatterer numerous brownish-black blotches, and stria- 

 tions. A number of papillae occur at points corresponding to the 

 larval spines. These are tipped with yellow. 



Antennal Sheaths: checkered alternate black and grey-green. 



Head Region: heavily blotched with brownish-black. 



Wing Cases: an irregular brownish-black line crosses tan- 

 gentially, which bears a fanciful resemblance to the letter Y with 

 an elongate tail. Two rows of dark spots occur near the outer 

 margins, the row most laterally placed having six, the other four 

 spots. 



Abdominal Segments: grey-green or silvery Avhite, with nu- 

 merous minute papillae, tipped with yellow and shaded anteriorly 

 with blackish-brown crescentic spots. 



EXPLANATION OF FIGURES. 



Plate A. Fig. 1. Lateral view of Pupa of Euphydnyas Sierra, Wright. 

 Fig. 2. Dorsal view of same. Fig; 3 . Ventral view of same, — all greatly 

 enlarged. 



Fig. 4. Upper side of male Euphydryas sierra. Fig 5. Upper side of 

 female of same species. Fig. 6. Lower side of male, same species, — all reduced 

 to about 2/3 natural size. 



