57 2 NE W YORK STATE MUSEUM 



yellowish with a bright emerald green tint on the thorax and entered the 

 ground. 



The adult female is nearly )^ inch in length, uniformly reddish yellow 

 marked with brown. 



Bibliography 



1895 Dyar, H. G. Am. Ent. Soc. Trans. 22 1308 



1896 Marlatt, C. L. U. S. Dep't Agric. Div. Ent. Tech. Ser. 3, p. 88 



Pteronus latifasciatus Cress. 



Brown-headed, purplish, solitary or partly gregarious sawfly larvae occur on white 

 birch. 



The larva of this insect was met with by Dr Dyar at Keene Valley 



and his description is as follows : 



Head vinous brown, dotted with brown over the vertex, eye black ; 

 width 1.6 mm. Body purplish vinous tinted, a metallic red-green shade 

 over the dorsum, partly produced by the food showing by transparency ; 

 segments indistinctly 6-annulate, shining, a lateral black shade band, scarcely 

 noticeable against the metallic shade, supplemented by black patches on the 

 folds around the spiracles, subventrally and on the bases of the legs, the 

 latter distinct against the pale purplish subventral color. Feet all pale, 

 yellowish tinged; abdominal on joints 6-1 1, 13, small ; anal plate and short 

 prongs black ; setae minute, seen with a lens. 



The adult insect is a dusky black, white-marked, sawfly about J/3 inch in 



length. 



Bibliography 



1895 Dyar, H. G. Am. Ent. Soc. Trans. 22 : 304 



1896 Marlatt, C. L. U. S. Dep't Agric. Div. Ent. Tech. Ser. 3, p. 50 



Amauronematus luteotergum Nort. 



A black-headed, greenish sawfly larva feeding gregariously on the edges of alder 

 leaves belongs to this species. 



This larva was met with by Dr Dyar on alder at Keene Valley N. Y. 



and he has described two stages as follows : 



Larva. Head shining black, sutures of mouth pale ; width .85 mm. 

 Feet on joints 6-1 1 and 13; anal prongs black. Body shining green, yel- 

 lowish subventrally and on the legs ; segments obscurely annulate, all 

 minutely pilose,, but no distinct tubercles ; a blackish subdorsal shade-band 



