22 PEOCEEDIISrGS OF THE NATIONAL MUSEUM vor.. 78 



stigma paler; abdomen black, first segment largely ferruginous, other 

 tergites apicaliy and laterally white. 



Type-locality. — Trinidad Rio, Panama. 



Type.— C?it. No. 42188, U.S.N.M. 



One female taken June 6, 1912, by August Busck. 



20, POLYCYRTUS (POLYCYRTUS) SULCATILOBUS, new species 



Female. — Length 13 mm. 



Vertex in front view flat; frons with scrobes shallow, horn very 

 thick conical with a large pit on each side of its dorsal surface ; eyes 

 weakly convergent below, comprising much less than two-thirds total 

 width of head; face shallowly impressed on each side of middle, 

 minutely alutaceous, distinctly, sparsely punctate above ; malar space 

 as long as basal width of mandible, cheeks in front view convex^ 

 mouth as broad as narrowest width of face ; temples in side view 

 very broad, occipital carina convergent above with posterior margin 

 of eye, rather low, straight and joining hypostomal carina at its outer 

 third, latter very high beyond junction ; diameter of an ocellus hardly 

 two-thirds as long as ocell-ooiilar line and shorter than postocellar 

 line. Thorax polished ; pronotum longitudinally striate in middle of 

 posterior margin, anterior lateral margin with the carina high, 

 epomia strong and forming a carinate angle at anterior end of welt- 

 like humeral margin ; prescutum rather low ; lateral lobes each with 

 a deep sulcus in middle; scutellum not elevated; prepectal carina 

 obsolete above ; subalar tubercle not carinate ; metapleurum sparsely 

 punctate anteriorly, obliquely rugose posteriorly; propodeum 

 medially impressed basally as far as apophyses, carina curving 

 sharply forward medially, spiracle elongate oval, apophyses stout 

 conical, closer to carina than to apex; hind femur much less than 

 twice as thick in middle as at apex, inner calcarium two-fifths as 

 long as basitarsus ; areolet normal, recurrent and nervulus antef urcal^ 

 postnervulus broken at middle, nervellus at lower third. Abdomen 

 stout, second tergite two and a half times as long as broad at base, 

 much shorter than first ; sheath slightly shorter than hind tibia. 



Head black; orbits, temples, cheeks and malar space, palpi, apex 

 of horn, and annulus on flagelar joints 6-12 and apex of 5 Avhite; 

 prothorax black and white, the propleura and lower and humeral 

 margins of pronotum broadly white; mesoscutum black with two 

 lines on disk white; scutellum apicaliy and the carinae white; post- 

 scuteilum white, the lateral areas black; mesopleurum ferruginous 

 with upper margin black and a large triangular spot in upper an- 

 terior angle white; metapleurum ferruginous with a white spot in 

 its upper division; propodeum ferruginous; legs ferruginous with 



