MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID^. C5 



long blunt tooth, the surface within obtuse, scarcely denticulate, while 

 the flagellar joints, after the tirst, are twice as long as thick. 



Habitat. — Nevada. 



Type 9 in Coll. Ashmead. 



Described from a single specimen. 



Mesitius miuutus. 



sp. uov. 



S . Length, 2.2'"'". Black, shining, the surface minutely coriaceous, 

 very finely sparsely pubescent. Head a little longer than broad across 

 the eyes. Mandibles rufous, not broadened at tips, the outer tooth 

 acute, followed by about 4 very minute deuticulations. Autennai 13- 

 jointed, long, brown ; scape stout, uot more than twice as long as thick 

 and very little longer than the first funiclar joint; pedicel and first 

 funiclarjoint about equal; the remaining joints longer, fully thrice as 

 long as thick. Prothorax twice as long as the mesouotum, rounded 

 anteriorly; mesonotum with 2 furrows more deeply impressed poster- 

 iorly; scutellum with two oblique fovea? opposite the mesonotal fur- 

 rows; metathorax subquadrate, the posterior angles a little rounded, 

 minutely coriaceous, with a median longitudinal carina and some very 

 short raised lines at base. Teguhne brownish-yellow. Wings hyaline, 

 the venation yellowish or pale; the transvei-se medial nervure curved 

 outwardly. Legs rufous, coxai and anterior femora black, the middle 

 and posterior femora fuscous. Abdomen polished black, shorter than 

 the thorax, the third segment one-third longer than the fourth. 



Habitat.— Arlington, Va. 



Type S in Coll. Ashmead. 



Described from a single specimen. 



Mesitius californicus, sp. nov. 



9. Length, 3.1-"'. Polished black, the head alutaceous. Head 

 oblong, 1^ times as long as broad, the eyes whitish. Mandibles brown- 

 ish-yellow, truncate but not broadened at apex,- the outer tootli acute, 

 followed by about 4 minute teeth. Antennas 13-jointed, extending to the 

 teguLoB; scape stout, piceous, as long as the three following joints united, 

 a little curved and narrowed at base; flagellum brown, tapering towards 

 tip; pedicel and first fiagellar joint about equal, the following joints 

 l.Uimes as long as thick, the last longer. Prothorax fully thrice as 

 long as the metanotum, rounded before; mesonotum with 2 nearly 

 parallel furrows and a delicate short line on the scapuhe; scutelhim 

 with 2 oblique fovea? at base; metathorax about 1^ times as long as 

 wide, minutely sculptured with a median carina and some faint, short, 

 irregular raised lines at base. Wings hyaline, very faintly tinged, the 

 nervures brown, the venation as in vancouverensis. Legs rufous, coxa 

 and anterior femora black, middle and posterior femora more or less 

 piceous. Abdomen oblong ovate, nearly as long as the thorax, black, 

 21899— No. 45 5 



