OF NORTH AMERICA. 235 



larvae. To show the relationship of these genera to Agarista, from 

 AustraUa, the larva of A. Casuerincc is figured in pi. lo, fig. ri. 



'^ Larvd. General appearance bluish. The ground color is, how- 

 ever, pure white, and the apparent bluish cast is entirely owing to the 

 ocular delusion produced by the white with the transverse black stripes, 

 as in Alypia octomaculata. Transversely banded with four black stripes 

 to each joint, the third and fourth being usually rather wider apart 

 than the other two, and diverging at the lower sides, where they make 

 room for two more or less conspicuous dark spots, placed one below 

 the other ; the third, on some of the middle joints, is frequently 

 broken with an anterior curva, just above stigmata, and on joints 2 

 and 3 it is twice as thick as the rest. Cervical shield; hump on joint 

 II; anal plate; legs and venter dull pale orange; joint i with about 14 

 large shiny piliferous black spots, 8 of which form two rows on the 

 cervical shield (those on the anterior row being largest and farthest 

 apart), and six of which are lateral, namely, three on each side, with 

 more or less distinct dusky marks between and in front of them. The 

 spots on the hump are usually placed as at fig. 26 c, (pi. 10, fig. 12 a), 

 but vary very much, though the four principal ones on the top are 

 generally placed in a square. The anal plate is marked with eight 

 such spots, very much as in the cervical shield, but smaller. The tips 

 of the thoracic legs are black, and the other legs and venter are also 

 spotted. Head, gamboge-yellow, inclining to orange, with 8 principal 

 and other minor black piliferous spots. The ordinary piliferous spots 

 are small, and except two dorsal ones, which are in the white space 

 between the second and third bana, they are not easily detected. The 

 stigmata are also quite small and round. The abdominal prolegs de- 

 crease in size from the last to the first pair, and the larva curves the 

 thoracic joints, and is a half looper, especially when young. Aver- 

 age length, about one inch. Described from numerous specimens." 



''Chrysalis. Average length, 0.37 inch; reddish brown ; rugose, 

 especially on dorsum of abdominal joints, but distinguished princi- 

 pally by the truncated apex, which has a large horizontally compressed 

 ear-like horny projection, at each upper and outer edge." 



Riley, 3d Rep. St. Ent. Missouri, p. 65. 



The larva, as noticed by Riley, is abundant round St. Louis, feed- 

 ing on the grapevines. " The worm works, for the most part, in the 

 terminal buds of the vine, drawing the leaves together by a weak silken 

 thread, and cankering them. It forms a simple earthen cocoon, or 



