34 E. T. CRESSON. 



puuctui'ed, stigmata of first segment placed in the middle, tip slightly 

 and gradually dilated. Length 5 lines. 

 One S specimen. 



2. Mesoleptus melleus, n. sji. 



% . — Honey-yellow, smooth and polished ; f\ice, vertex below ocelli, 

 clypeus, mouth, a very broad annulus on antennae, scape, and tegulae, 

 pale lemon-yellow; rest of antennae, and spot covering ocelli, black; 

 tarsi yellowish ; wings yellowish-hyaline, iridescent, apex faintly dusky, 

 nervures brown, stigma pale ; base and apex of third, and the follow- 

 ing segments entirely, fuscous. Head short, face broad, eyes large, 

 clypeus small, transverse; antennae as long as the body, rather slender, 

 filiform, subpubescent ; scutellum convex ; metathorax rounded, 

 smooth and polished; wings large and broad, areolet wanting; legs 

 slender; abdomen clavate. subconvex, subpetiolated, smooth and po- 

 lished, first segment channelled at base, apical segments subcom- 

 pre^sed. Length 31 lines. 



One S specimen. 



3. Mesoleptus bardus, n. sp. 



Z . — Clothed with short pubescence ; head black, face, anterior 

 orbits, clypeus, mouth and lower part of cheeks, yellowish; on each 

 side of clypeus and posterior orbits stained with reddish; antenn;T9 

 black, with a broad yellow annulus, scape honey-yellow ; thorax ferru- 

 ginous, collar, tegulae; and scutellums yellow ; spot on prothorax, scu- 

 tellar region, sutures of thorax, and pleura beneath, black, metatho- 

 rax honey -yellow ; wings subhyaline, beautifully iridescent, nervures 

 and stigma brown; legs honey-yellow, the tarsi and four anterior coxa) 

 and trochanters yellowish, sometimes the posterior coxae and trochan- 

 ters and their femora within black; abdomen blackish, apical margin 

 of, or dorsal stains on, all the segments dull honey-yellow. Head 

 large, buccate, clypeus convex, anterior margin broadly rounded and 

 margined ; antennae long, slender ; mesothox'ax shining, subtrilobed in 

 front, punctured on the disk; scutellum subconvex; metathorax ex- 

 cavated behind, elevated lines sharply defined ; wings ample, areolet 

 broad, 5-angular; legs subrobust; abdomen petiolated, elongate, flat- 

 tened, first segment squarely dilated at tip. Length 31 lines. 



Two S specimens. 



4. Mesoleptus imbecillis, n. sp. 



% . — Honey-yellow; head, pro-audmesothorox, scutellar region, and 

 pleura, black ; clypeus, mouth, collar, tegulae, line beneath, scutellum, 

 postscutellum, and anterior coxae and trochanters white : wings hya- 



