298 AMERICAN HYMENOPTERA. 



black, brown beneatb on apical portion ; wings hyaline, nervuresaud stigma dark 

 brown, paler at base; humeral cross-nervure of hind wings slightly broken below 

 middle and the nervure leading from it scarcely indicated ; abdomen is consider- 

 ably compressed and truncated at apex ; the face has two very obscure white 

 lines leading from the scape to the clypeus. 



% . — Differs in having the entire face, scape beneath and lai'ge cuneiform spot 

 on margins of mesonotum pale; abdomen not compressed at apex and segment 

 2 black, except at apex. 



Two females from Moscow, Idaho (Prof. Aldrieli), and one male 

 from Colorado ; females in coll. G. C. D. ; male in coll. U . S. Nat. 

 Mus. 



Jflesoleius convexiis n. sp. 



9. — 8 mm. Black, abdomen rufous, except base of petiole, which is black; 

 legs rufous ; clypeus, mouth-parts, tegulse, point in front and spots on lateral 

 margin of mesonotum, yellow; antennae brownish red, scape dusky; wings hya- 

 line, nervures and stigma brown ; humeral cross-nervure broken considerably 

 below the middle: abdomen large, arched, broadly convex ; ventral fold large; 

 carinse on petiole distinct; face concave at base of clypeus. 



One specimen from New Hampshire Uype, coll. Amer. Ent. Soc. ). 



Mesoleius siibiiiar$;iiiatu»i Cress. (Tryphon), Pr. Ent. Soc. Phil. iii. 274. 



Cri/pfoceiitruK subiuarghuitus Cress., Walsh, Trans. St. Louis Acad, iii, 157. 



Tri/phon canaHcidntas Prov., Nat. Cau. vii, 116. 

 '^ 9 . — 5-8 mm. Black, with more or less of face, clypeus, mouth-parts, cheeks 

 beneath, scutellums, tegula?, spot in front, sometimes triangular spot on margins 

 of mesonotum. apical margins of abdominal segments (least so on first two or 

 three), broad annulus on posterior tibiae and tibial spurs white; the' %, has all the 

 above parts white and also the four anterior coxae and trochanters; meso- and 

 metasteruum and pleurje, rufous; legs rufous with posterior tibiae at apex and 

 usually base and hind tarsi, black ; antennae brown, darker at base ; wings hya- 

 line, nervures and stigma brown ; sometimes the % has the sterna, pleural, pectus 

 and scape beneath white. 



Fifteen females and fonr males from Massachusetts, New Hamp- 

 shire, Canada, New York, Michigan, Texas, Colorado, Nevada, 

 Washington and So. California. Date of collection September 20th 

 and October 2d and 5th (types, coll. Amer. Ent. Soc). 



IVIesoleiiis pulchraiiotus n. sp. 



'^ . — 5 mm Head, line on prothorax above collar, metanotnm, abdomen, base 

 and apex of tibiae and tarsi of hind legs, black; mesonotum, upper mesopleurae 

 and all of metapleurae, honey -yellow ; all the rest of the body including the legs, 

 apical margins on abdominal segments and large triangular spots on lateral mar- 

 gins of mesonotum, pure white; antenn* brown, paler beneath, scape white; 

 wings hyaline, beautifully iridescent, nervures and stigma yellowish brown^ 

 carinae on basal segment of abdomen small ; antennae slightly longer than body. 



One specimen from Texas (type, coll. Amer. Ent. Soc). 



Mesoleins inellipes Prov., Fauue Ent. Cau. ii, 416. 



'Jj 9. — 6-7 mm. Black, with lower mesopleurse, sternum and pectus rufous 



