16 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



12. POLYCYRTUS (POLYCYRTUS) NIGRICLYPEATUS, new species 



Fe7)iale. — Length 13 mm. 



Vertex in front view concave; frons with rather deep scrobes, 

 horn stout conical with two small pits above base; eyes convergent 

 below, comprising nearly two-thirds total width of head; face pol- 

 ished, with a median elevation, malar space much longer than basal 

 width of mandible, slightly constricted, mouth hardly as broad as 

 narrowest width of face ; occipital carina in profile slightly converg- 

 ent above with posterior margin of eye, very prominent below and 

 separated from hypostomal carina by a deep groove; temples 

 strongly concave, oblique, about a third as long as short diameter 

 of eye; diameter of an ocellus little more than half as long as 

 ocell-ocular line, but fully a half longer than postocellar line; basal 

 joint of flagellum nearly ten times as long as thick. Thorax pol- 

 ished; anterior lateral carina of pronotum not especially high, 

 epomia absent; prescutum elevated, lateral lobes of mesoscutum 

 somewhat flattened; scutellum high, compressed; prepectal furrow 

 only obsoletely foveolate; metapleurum obsoletely punctate in mid- 

 dle; pro.podeum medially impressed, especially basally where the 

 impression is flanked by high rounded elevations, carina slightly 

 curved medially, spiracles elongate, apophyses long, curved, much 

 nearer carina than apex; hind femur slender, much less than twice 

 as thick in middle as at apex; inner calcarium a little more than a 

 third as long as basitarsus; areolet narrow, recurrent and nervulus 

 interstitial or nearly; postnervulus broken in middle, nervellus at 

 lower fourth. Abdomen narrow, second tergite more than four 

 times as long as broad at base, broadly constricted near base, nearly 

 as long as first ; sheath almost exactly as long as hind tibia. 



Head black with only mandibles, palpi, and flagellar joints 5-10 

 white, basal joint of maxillary palpus piceous; thorax immaculate 

 ferruginous; legs concolorous, front pair paler, front and middle 

 tarsi apically infuscate, hind femur Ijlack except at base, tibia yel- 

 lowish, tarsus whitish; wings hyaline, veins and stigma black; ab- 

 domen black, petiole ferruginous, other tergites apically and laterally 

 white, the apical bands angulately broadened medially; venter white, 

 gastrocoeli reddish. 



Type locality. — Rio Trinidad, Panama. 



Type.— Cat. No. 42181, U.S.N.M. 



One specimen taken March 29, 1912, by August Busck. 



13. POLYCYRTUS (POLYCYRTUS) IMPRESSUS, new species 



Fenude. — Length 12 mm. 



Similar in form to nigriclypeoius as described above but differ- 

 ing as follows: Frontal horn almost subclavate in profile; malar 



