180 Journal New York Entomological Society. [Voi. iv. 



a tubercle of the lateral row on joint 5, and the moving up of the spir- 

 acle ; yet it is without stinging spines, the warts are hairy, a primitive 

 first stage is present as in no other spined Eucleid, and the arrangement 

 of the warts on the thorax corresponds strictly with that of the smooth 

 Eucleids, there being three well developed warts on joints 3 and 4. It 

 is, therefore, a generalized form, a connecting link between the groups 

 of Eucleid;"e and of particular interest. If we disregard its special 

 adaptation, which is unique, this form represents the early stem of the 

 spined Eucleids, at a time before the primitive first stage was lost, be- 

 fore the setce had become poisonous spines and while the original num- 

 ber of warts were yet present on the thorax. It is only slightly removed 

 from the stem of the smooth Eucleids, differing from them in the 

 specialization of joint 5, the complete coalescence of sette land ii in stage 

 I, and in the only partial degeneration of the original setas* of the 

 warts, which is complete in the smooth Eucleids, but in Phobetron 

 advances slowly throughout ontogeny. The number of larval stages 

 appears to be abnormally large. I have not specially investigated the 

 constancy of this number. 



Affinities, Habits, etc. 



The allies of this larva are to be found in South America. Stoll 

 figures the larva of hipparchia exactly like that of pitheciiim, as far as 

 can be seen from the figure. We have also in Florida the species 

 beiitenmiielleri, which seems nearly allied, though the larva is unknown. 

 The habits are in general similar to those of the other Eucleidre. The 

 eggs are laid singly, and the larvae live on the under sides of the leaves 

 tilFthe last stage, where they rest on the upper side and feed fully ex- 

 posed. Full grown larvte may be found during September ; the eggs 

 are laid in July, and there is but a single brood. 



The full grown larva strikingly resembles a part of a dead leaf 

 which had fallen on the surface of the foliage. 



For material I am indebted- to Miss Morton for the eggs and stages 

 I and II, which she obtained from moths bred from cocoons which I 

 sent her for that purpose. I have also found the larva as young as stage 

 III, at Bellport, Long Island. Mrs. Knopf kindly made the original 

 drawings of figures 2 to 7, 13 and 14 of the plate. 



*The primary setae remain on the warts, single; the secondary wart hairs de- 

 generate and almost completely disappear in the last stage ; the final coating ot 

 fine hairs is, therefore, tertiary, and belongs to the special adaptations. 



