THE CANADIAN ENTOMOLOGIST. 



DESCRIPTIONS OF SOME BUTTERFLY LARV^ FROM 

 YOSEMITE (V.), AND THE LIFE HISTORY OF 

 CALLIDRYAS EUBULE. 



BY HARRISON G. DYAR. 



Pyrameis cardui, Linn. 



The life history of this well-known species has not been written, to 

 judge from the references given by the late Mr. Henry Edwards in his useful 

 catalogue, so I present it here ; — 



Egg. — Cylindric-conical, the base flat with the usual vertical ribs ; 

 colour pale yellow ; diameter .6 mm. Laid singly. 



First larval stage. — Head rounded, black and shining; width .3 mm. 

 Cervical shield and anal plate black ; body very blackish with a number 

 of short dark hairs ; feet normal. The larva lives under a slight web on 

 surface of leaf. 



Second stage. — Head as before with a {q\n hairs ; width .6 mm. Body 

 dull black, furnished with rows of short conical blackish tubercles each 

 with a long hair ; the tubercles of the rows (i) and (2) on joints 6, 8 and 

 10 are pale yellow. Hair blackish ; feet black. 



Third stage. — Head slightly bilobed, black, shining, a few black hairs 

 from minute tubercles ; width i.i mm. Body black, covered with spined 

 processes arranged as in Grapta^, all black except the three dorsal ones 

 on joints 6, 8 and 10 which are yellow, but with black spines. 



Fourth stage. — Head bilobed, uniform shining blac k, with many black 

 hairs arising from elevated bases ; width 1.9 mm. Body black, minutely 

 dotted with yellow ; processes black except the bases of the three dorsal 

 ones on joints 6, 8 and 10, which are dark yellow. As the stage advances 

 a very narrow geminate dorsal and single subventral broken yellow line 

 appears. The larvse live singly under nets constructed of silk supported 

 on a leaf. 



Fifth stage. — Head rounded, uniform sublustrous black, the mouth 

 parts paler and bases of antennae reddish ; covered with black hairs of 

 considerable length, which arise from small tubercles; width 3.5 mm. 

 Body deep black, brownish subventrally and on the legs, with numerous 

 minute yellow piliferous tubercles bearing whitish hairs. The shafts of 

 the processes are all more or less colourless, but the branches and tips are 

 all black and the bases are shining blue-black. There is a row of inter- 



See " Descriptions of some Butterfly larv?e from Yosemite," No. VI. 



