CHALCID FLIES OF GENUS PERILAMPUS — SMULYAN 409 



PERILAMPUS ROBERTSONI Crawford 



Perilampus robertsoni Crawford, Proc. Ent. Soc. Washington, vol. 16, p. 71, 1914.. 



Female. — Length about 2.5-3 mm. Head: Frons meeting vertex 

 in a more or less sharp angle, sometimes with a semblance of a 

 carina; emargination of fron to vertex usually conspicuous, the scrobal 

 cavity rather deep, its sides sloping rather sharply; front and face 

 smooth except for hair pimctures; hyperclypeal area as long as or 

 nearly as long as clypeus; cheeks straight or nearly straight; head in 

 front view somewhat elongate and subtriangular, very distinctly 

 narrowed below eyes ; eyes not reaching level of base of clypeus ; face 

 below eyes sometimes somewhat concave. 



Thorax: Area along inner margin of parapsides smooth (sometimes 

 more or less roughened in the males); umbilicate punctures on 

 mesoscutum and scutellum angulated, interspaces thin, mere septa; 

 anterior edge of pronotum at lateral angles not depressed, the 

 punctate portion of pronotoprepectal area dorsally occupying half 

 or more than half of distance between anterior edge of pronotum 

 and tegula of wing; axilla with a triangular or roughly triangular 

 extension as wide as long on side of scutellum, the base extending 

 to or above middle of axilla, face of axilla sloping more or less toward 

 base of extension and not depressed or excavated above base of 

 extension; basal shallow furrows on underside of apex of scutellum 

 turning caudad medially and meeting on the median line at an acute 

 angle; neck of propodeum coarsely sculp tiu-ed; wing hairs short and 

 pale ; postmarginal vein about as long as or only slightly longer than 

 stigmal vein, its apex rather distinct; thorax as a rule about 1.5 

 mm in length. 



Abdomen: Posterior face more or less longer than wide; first 

 tergite petioliform, witliout an elevated anterior margin or flange 

 and usually m.ore or less rugosely sculptured, sometimes almost 

 entirely smooth. 



Color: Black; head and abdomen often with a grajdsh reflection; 

 flagellum of antenna grayish dull dark brown to grayish brown, 

 more or less pale on under side; scape greenish; legs brown, in part 

 with a greenish tinge or reflection, coxae and femora sometmies black 

 or blackish, the apices of femora sometimes testaceous or reddish, 

 tips of intermediate and posterior tibiae and anterior tibiae except 

 a stripe above testaceous or reddish, tarsi testaceous or reddish; 

 wings hyaline, veins testaceous, sometimes reddish basally. 



Male. — Length about 2.25-2.75 mm. Similar to female; but the 

 frons meeting vertex in a distinct angle, often with a rather distinct 

 carina above, the emargination of frontovertex more pronounced and 

 the sides of scrobal cavity more sharply sloping than in the female; 

 head usually somewhat transverse and eyes usually reaching base of 

 clypeus; scape rather broad apically, the portion bearing sensorial 



