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



lar general surface into a series of latticed ridges. They are as follows : 

 (i) large, intersegmental, angularly elliptical; (2) small, addorsal, 

 segmental, rounded triangular; (3) under the subdorsal lidge, small, 

 triangular, shallow; (4) large, lateral, intersegmental, elongate or nar- 

 rowly elliptical; (5) of moderate size, above the lateral ridge, rounded 

 triangular, segmental ; (6) very small, shallow, alternating with the lower 

 part of the fifth series just above the lateral ridge. In the subventral 

 space a shallow ill-defined series (7) alternate with the spiracles, and 

 another similar one (8) is situated below them. 



This larva is throughout very smooth, the setce practically disap- 

 pearing at first molt. The coloration is green, a large red mark in the 

 shape of an irregular diamond or large blurred cross gradually appears 

 on the back, beginning in the form of a small patch between two yellow 

 lines. The marking appears to be mimetic of red patches or galls on 

 its food plants. 



The larva is rather highly specialized, especially in regard to its 

 skin structure which somewhat approaches that of Eulimacodes, while 

 the setae disappear early. Its shape, however, is quite normal and typ- 

 ical of the smooth Eucleids in general, and the setae of stage I are in a 

 less advanced degree of degeneration than in Apoda y-i/wersa or Tortri- 

 cidia fasciola. 



Affinities, Habits, etc. 



This larva is allied to the small species which I have doubtfully 

 identified as Heterogenea flexiiosa and doubtless also to the European 

 H. asella, though this has not been examined by me. It belongs to 

 the group of the northern smooth Eucleids, and represents a more primi- 

 tive state than Apoda in that setse ia and ib on joint 4 and i and ii on 

 joints 5 to 12 are partly united into a furcate or Y-shaped spine, both 

 limbs of equal length, whereas in Apoda one limb has been reduced to 

 a slight prominence. 



The moths emerge over a considerable period of time. Full grown 

 larvae may be found unusually early, often during July, while others do 

 not mature till late in September. This power of early emergence 

 gives the species a northern range. In the Adirondacks it was the only 

 Eucleid met with. In Long Island eggs and young larvae Avere found 

 on the trees at the same time that other larvae were matured. 



The larva is a rather low feeder, occurring on higher bushes and 

 the lower branches of trees, along the edges of woods, etc., not as a 

 rule in very shaded locations. Rarely more than one larva is found on 



