IV. NONAGRIA SUBCARNEA, N. S. 



D. S. KELLICOTT. 



The larvae of two species of Nonagriinae occur abundantly as 

 borers in Typha latifolia growing in the vicinity of Buffalo. One 

 is that of Sphida oblujuata, G. and R., the other that of a species 

 which, I believe, has not been described. I have known and 

 observed these larvae for several years, but have not yet made 

 out the differences in the earlier stages of growth with much 

 certainty. The adult caterpillars, however, are distinguished 

 with ease, either by their structure or by their habits, so I shall 

 describe only the adult of the one which I have called Nonagria 

 subcarnea, and compare it with that of S. obliquata; also with that 

 of N. typhce of Europe, one of which Mr. A. R. Grote has been 

 kind enough to furnish me. 



This larva attains a length of 55 mm.; it is cylindrical, slender, 

 naked, smooth and somewhat shining. The color is rather light; 

 the skin in some examples is decidedly carneous, in others smoky, 

 particularly on the thoracic rings. The lines are almost obsolete; 

 the piliferous spots are small and round; a weak chestnut hair 

 arises from each. The anal and thoracic shields are slightly cor- 

 neous, brown and shining. The thoracic rings are strongly folded 

 transversely. The spiracles are narrowly elliptical, even slit-like, 

 with the rings shining black. The hemispherical head is light in 

 color, mottled with ocherous. 



The differences between this larva and that of N. typhce are 

 ample for its ready separation. It is less stout than typhce; the 

 spiracles are more narrow and longer; the epicranial suture is 

 much longer, the fork not extending so far up on the head; and 

 the color of the head of typhce appears to be quite uniformly 

 brown, while this one is mottled. 



It may be separated from the larva of S. obliquata by its light, 

 often carneous hue, that species being darker or quite black; the 



