18 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



15. POLYCYKTUS (POLYCYRTUS) CONVERGENS, new species 



Female. — Length 15 mm. 



Differs from foregoing description of nigriclypeatus as follows: 

 Vertex in front view very strongly concave; frontal horn more 

 slender, cylindrical with apex rounded; the pits above base large, 

 face sparsely weakly punctate and with an obliquely longitudinal 

 impression on each side rather than a median elevation ; malar space 

 much shorter than basal width of mandible; mouth fully as broad 

 as narrowest width of face; diameter of an ocellus two-thirds as 

 long as ocell-ocular line; first flagellar joint hardly eight times as 

 long as thick. Anterior lateral margin of pronotum strongly an- 

 gulate, the carina high; prescutum low; metapleurum distinctly 

 though sparsely punctate in middle; propodeum much more shal- 

 lowly impressed, the impression extending only a short distance be- 

 hind the carina, basal elevations much less prominent, carina more 

 strongly bent medially, apophyses much shorter, straight, com- 

 pressed, midway between carina and apex; hind femur nearly twice 

 as thick in middle as at apex; inner calcarium two-fifths as long 

 as basitarsus; areolet rather broad, recurrent antef ureal, nervellus 

 broken just above lower third. Second tergite about three and one- 

 half times as long as broad at base; sheath distinctly shorter than 

 hind tibia. 



Face and clypeus as well as mouthparts white ; annulus beginning 

 on fourth joint of flagellum; apex of scutellum and postscutellum 

 blackish; petiole largely black above, pale below; extreme apex of 

 pospetiole white, apical white bands of other tergites of uniform 

 width, not broadened medially. 



Type-locality. — Yarhuarmayo, Peru. 



Type.—CBi. No. 42184, U.S.N.M. 



One specimen taken by C. H. T. Townsend. 



16. POLYCYRTUS (POLYCYRTUS) ISTHMUS, new species 



FeTTiale. — 12 mm. 



Vertex in front view shallowly concave; frons with scrobes deep 

 but not defined on inner side, horn stout, conical, with a tubercle 

 above its base; eyes convergent below and comprising nearly two- 

 thirds total width of head at antennae ; face shining, minutely aluta- 

 ceous and sparsely punctate, shallowly impressed on each side of 

 middle; malar space much shorter than basal width of mandible, 

 hardly constricted, mouth fully as broad as narrowest width of face ; 

 temples iij side view bro.'»d, convergent above with posterior margin 

 of eye, occipital carina very high below, where it recurves sharply 

 to meet the hypostomal carina far beyond middle of latter with a 

 narrow notch just before the junction, hypostomal carina very high 



