196 EDWARD NORTON. 



Tliorax trilineate with black, scutel pale "a, vertebratus. 



40, integer. 



41, S. pomum. 



42, hospes. 



4.H. trivittatus. 

 Thorax bilineate with black 45, aureopectus. 



4(), mendicus. 

 Metathorax and part of terguiu black 47, chloreus. 



48, stigmatus. 

 JI. Thorax and abdomen ])ale 49, monochroma. 



1. Nematus concolor, n. sp. 



Wholly black; wings subhyaline, with a violaceous tinge. Length .24. Br. 

 wings 0.54 inch. 



$ . Black; antennaj rather stout; head rather coarsely punctured; 

 thorax with shallow, coufluent punctures; nasus smooth, with rounded 

 notch before, its edge and the labruiu reddish-white; abdomen ovate, 

 short; legs black, anterior tibise and tarsi dull piceous, inner claws large; 

 wings with a violaceous tinge, uervures piceous, second submarginal 

 with two angles beneath, widest at the first, a bulla covering most of 

 first submarginal cross line and another at the reception of the first re- 

 current nervure or submarginal nerve extending along the nerve. 



% . Antennae long and slender. 



Connecticut ; Albany, N. Y., Dr. Peck. (One 9 , one % .) 



2. Nematus Labradoris, n. sp. 



Shining black; tibise pale; wings hyaline. Length 0.24 — 0.32. Br. wings 

 0.56—0.76 inch. 



9- Black; body stout, as in SrlanJria. Antenucie moderate, flat- 

 tened ; all the joints of nearly ecjual length ; nasus moderately emargi- 

 iiate, face black ; labrum piceous ; tegulae black ; abdomen ridged 

 down the back, apex pale ; legs black ; apical half of anterior femora 

 beneath and all the tibiae, except tips of hinder pair dull white ; inner 

 spur of anterior tibiae large and blunt, tibiae pilose; second tooth of 

 claws as large as first; wings ample, hyaline, nerves brown, stigma and 

 costa pale greenish ; second submarginal with two angles beneath, 

 widest at first; the second recurrent nervure received very near the 

 second submarginal nervure. 



% . The male is (|uite slender and the anteniKC longer and more 

 slender. 



Labrador, (A. S. Packard, Jr.) Two 9 , one % . 



One of the females is not more than half the size of the other, but 

 preserves the same characteristics, 



3. Nematus malacus, n. sp. 



Black; tcguhe, trochanters and legs below knees pale. Length 0.28. Br. 

 win<i;s 0.60 inch. 



