AMERICAN HYUENOPTERA. 77 



Notes on North American TENTHREDINID.E, 

 with descriptions of new species. 



BY EDWARD NORTON. 



Abia Kennicotti, Norton. 



Var.— Color wholly greenish-blue, with metallic reflections, hairs blackish; 

 fine cinereous hair is visible in certain lights on all the segments of the tergum ; 

 tarsi whitish ; wings distinctly clouded on the second marginal and the upper 

 half of third submarginal cells, the basal band as in other specimens; apical 

 edge of all the segments of the tergum whitish. 



Hub. — Texas. (Belfrage.) One specimen. 



PTE\OS, nov. gen. 



Ptilia, Sec. 2. Norton, Trans. Am. Ent. Soc. ii, p. 367. 1869. 



Tenthredinidse, Subfam. 2, Div. E. — Wings with one marginal, ap- 

 pendiculate cell and four submarginal cells, the second receiving two 

 recurrent nervures ; the second cell is long and the third is wider than 

 high; lanceolate cell petiolate. Under wing not appendiculate, and 

 with two inner cells. Antennae 3-jointed, slender, furcate in males, 

 ciliate ; maxillary palpi 4-jointed. Legs as in Ptilia; tarsi without 

 processes beneath, not dilated, first joint longest ; tibiae with two apical 

 spurs, no side spurs. 



Ptenos texanns. 



Ptilia texana, Norton, Trans. Am. Ent. Soc. ii, p. 367, $ % . 1869. 

 Texas. (Coll. Am. Ent. Soc.) 



Ptenos niger, n. sp. 



'£,.— Length 0.20; hr. wings 0.46 inch. — Color black; antennse not as long as 

 thorax, slender ; third joint furcate, with long coarse cilise, bent at tip, piceous ; 

 a piceous spot on each side of thorax, the edges of basal plates, of first segment, 

 and of each segment of venter, piceous ; palpi pale ; nasus and labrum fringed 

 with white hair; abdomen thick; legs blackish-piceous, with the apex of fe- 

 mora and most part of tibiae pale, their base piceous; wings hyaline, basal half 

 violaceous, sub-obscure, stigma piceous. 



Texas. (Coll. Am. Ent. Soc.) 



Ptenos nigropectus, n. sp. 



'J,.— Length 0.22; br. wings 0.46 inch. — Head, most part of thorax and apex 

 of tergum black; tegulse, collar, anterior angle, sutures of metathorax at sides, 

 and most of abdomen yellow-red; the very broad membranous notch waxen 

 whitish ; the four anterior legs yellowish below the tips of femora, black above ; 

 hinder legs black, becoming piceous below the femora; stigma and costal space 

 yellowish, basal half of wings smoky-yellow, apical half clearer, nervures 

 blackish ; antennte furcate, ciliate, slender, shorter than thorax, ciliae black. 



Texas. (Coll. Am. Ent. Soc.) 



