1864.] 285 



Genus EXOCHUS. Grav. 



Section 1. — Areolet small. 



1. Exochus apicalis. n. sp. 



Black, shining: face, orbits and tegulse, yellowish; legs and apex of abdomen 

 rufous. 



Male. — Black, shining, thinly clothed with a very short, appressed, 

 pale pubescence; face, mouth and orbits, yellowish, tinged with pale 

 rufous ; antennte about half the length of the body, riifo-piceous. Tho- 

 rax flattened above, shining ; tegulse yellowish ; metathorax abruptly 

 truncate behind, its posterior face concjive, on the disk above two not 

 well-defined, approximate, longitudinal carinas forming a narrow, elongate 

 central area. Wings hyaline; nervures and stigma black, the former 

 pale at base ; areolet minute, oblique and petiolated. Legs rufous, the 

 coxae black. Abdomen sessile, shining, cylindrical, very slightly nar- 

 rowed at base; the two apical segments rufous. Length Si' lines; ex- 

 panse of wings 5 lines. 



ffab. — Illinois. Dr. Samuel Lewis. 



2. Exochus fulvipes, n. sp. 



Bl^ick, polished: legs pale fulvous; wings hyaline, areolet oblique, petio- 

 lated. 



Male. — Black, smooth and polished, slightly pubescent; palpi pale- 

 yellowish ; antenna? brown-black above, rufo-piceous beneath, tinged 

 with yellow towards the base ; tegulai pale yellowish. Wings hyaline. 

 slightly iridescent; nervures and stigma black, pale at base; areolet 

 minute, oblique, and petiolated. Legs entirely pale fulvous. Abdomen 

 subcylindric, slightly narrowed at base, the second and following seg- 

 ments equilateral. Length 2t — 3 lines; expanse of wings 4 — 5 lines. 



Female. — Resembles the male, but the abdomen is shorter and 

 broader ; the ovipositor is yellowish and slightly exserted. 

 Hah. — Pennsylvania. E. T. Cresson. 



.3. Exochus pygmaeus, n. sp. 



Black, polished; legs pale fulvous; wings hyaline, areolet triangular, not 

 petiolated. 



Male. — DilFers from E. fulvipes only in the much smaller size, and 

 in the areolet of the superior wings being triangular, much larger and 

 not at all petiolated. Length 2 lines; expanse of wings 3j lines. 



Hah. — Illinois. Dr. Samuel Lewis. 



