194 Forty-second Report on the State Museum. [52] 



Larval Stages.* 



First stage. — Larvae from eggs collected on July seventh hatched on 

 the eleventh. The head of the newly -hatched larva, after assuming 

 its proper color, is glossy black and of an oval form. The body is 

 pale yellow- green, with a few short hairs; on the second segment are 

 two smooth, straight, subcylindrical, black horns, arising from a green 

 base, and with a slight enlargement at their apex, where they give out 

 two black diverging setae of the length of two-thirds that of the 

 horn. 



The young larvae feed in company, and occupy both surfaces of 

 the leaf, the entire substance of which they consume, except the 

 veins and veinlets, leaving frequently a very good skeleton of the 

 leaf. 



The first molting occurred on the eighteenth and nineteenth of July 

 At this stage the body is obscure green with seven fuscous lines, of 

 which the dorsal and stigmatal ones are narrow; the subdorsal and 

 lateral ones broader, having in them a row of short spines. The collar 

 (on first segment) centrally and the anal segment shining black. 

 Legs black; prolegs with a black spot outwardly. 



Second molt. — July twenty-eighth and twenty-ninth. Length of 

 larva, 0.37 of an inch. Head and collar glossy black. Horns slightly 

 spinose, enlarged at the tip, and usually with apical spines. The 

 abdominal stripes are black, with yellow-brown intermediately, show- 

 ing a broad stigmatal stripe. The terminal segment is spinose and 

 glossy black. 



Third Molt. — August fourth and fifth. Length, 0.60 of an inch. 

 The larva is glossy black, with eight yellow stripes, of which the 

 lower one is geminated by a crescent on the central portion of each 

 segment inclosing a spinule; ventrally, from the fifth segment, is a 

 yellow-green interrupted stripe. The horns are slightly tapering, 

 clubbed at their tips, and 0.20 of an inch long. The legs and pro- 

 legs are black. ■ 



Fourth Molt. — Extending from August fourteenth to sixteenth. 

 Immediately following the molting, the head, collar, horns, anal 

 shield and plates, and legs, are flavescent; in a few hours they became 

 shining black. The horns are but slightly enlarged at their tip, being 

 less so than previous to this molt The body is covered with 

 numerous shining, minute, elevated points of the color of the ground 

 on which they are placed. 



* From my Entomological Contributions, No. II (loc. cit.), of which a few copies only were 

 published. 



