220 Journal New York Entomological Society. [Voi. xv. 



Special Structural Characters. 

 Outline elliptical, exclusive of the appendages ; dorsal space even, 

 broad flat ; lateral space broad, subventral moderate, not retracted, 

 the spaces continuous, not separated by ridges, which are indicated by 

 the changes in direction of slope of the spaces. Tubercles greatly 

 modified as in Phobetron pithecium, the first stage also as in that species, 

 single everted spines with the basal half thickened, all alike. Tuber- 

 cle iii of joint 5 is absent. There result three warts on joints 3 and 4, 

 one on joint 5, and two each on joints 6 to 13, though only a trace of 

 the lower one of joint 13 remains. The warts are produced into fleshy 

 appendages, which are easily detachable, and deciduous at maturity. 

 They are capable of regeneration in the earlier stages. Those of joint 

 3, the two lowe.r of 4 and all the abdominal lateral row are small, 

 conical, contracted at base and bear but i^w hairs toward the tip. 

 The subdorsals of joints 4 to 12 are much more highly modified. 

 They are applied by very broad bases, though the actual attachment is 

 small, and cover nearly all of the dorsal and upper half of the lateral 

 spaces, the fringing hairs finally obscuring the sides and lateral hairs 

 from view. The terminal horn, bearing seta ii, is long and slender ; at 

 its base is a prominent circular bulb which bears seta i at its outer 

 side ; finally in the dorsal space is a pair of sparsely haired processes 

 for each horn and another such in the lateral space, which appear to 

 function as supporting structures. They are basal prolongations of 

 the appendages. The warts bear at first stiff, smooth, pale setae. 

 Gradually these become converted into a series of fine feathered hairs, 

 smooth at base and banded with black pigment, which replaced the 

 smooth hairs nearly entirely, covering the larva with a dense fluffy 

 coat, partially obscuring all the structures and giving the general 

 appearance of a green hairy disk. The skin is covered with a sparse 

 coating of colorless hairs from rather large clear tubercles. Depressed 

 spaces imperceptible. The skin is very thick and transparent, which 

 gives a glassy appearance to the larva ; the centers of the horns appear 

 as small green cores in a tube of glass and the basal forks of the sub- 

 dorsal horns are especially bright and shining. In the first stage the 

 tubercles are represented by single long spines of equal length through- 

 out, the subdorsals of joints 5,7,9 and 1 1 only differentiated by a slight 

 difference in direction of slope. In the immediately following stages 

 the subdorsal appendages of joints 7, 9 and 11 are much shorter than 

 the others, exactly as in Phobetron pitJiecium, but toward maturity all 



