28 PROCEEDINGS OP THE NATIONAL MUSEUM vol.78 



26. POLYCYETUS (POLYCYRTUS) ATRINASUTUS, new species 



Female. — Length 9 mm. 



This may prove to be the female of xobnthotliorax Brulle though 

 it differs from the males that I have determined as that species in 

 lacking the two pits at the base of the frontal horn though possess- 

 ing the tubercle, and in having the clypeus entirely and mandibles 

 partly black and the pronotum and propleura largely so. Other- 

 wise in the structural and colorational characters mentioned under 

 xanthothorax it agrees with that species and differs from 7nedialhus 

 Cushman. From mediaTbus it differs further in having the malar 

 space as long as basal width of mandible, the ocelli smaller; basal 

 joint of flagellum more slender; second tergite distinctly shorter than 

 first and hardly three times as long as broad at base; sheath nearly 

 as long as hind tibia. Clypeus black; mandibles largel}' black; an- 

 nulus beginning at base of joint 5; pronotum and propleura largely 

 black; scutellum at apex, postscutellum, and apophyses red, the scu- 

 tellum stained with piceous; front and middle legs darker, not at 

 all stramineous; tergites without median white spots, apicallj^ nar- 

 rowly reddish. 



Type-locality. — Minas Geraes, Brazil. 



Type. — In Paris Museum. 



One specimen taken at 1,000 meters by E. R. Wagner in 1903. 



27. POLYCYRTUS (POLYCYRTUS) COCKERELLAE Viereck 



Polycyrtics cockerellae Viebeck, Proc. U. S. Nat. Mus., vol. 43, 1912, p. 593, 

 female. 



Feniale. — Length 13 mm. 



Vertex in front view concave; frons with poorly defined scrobes, 

 horn rather small conical; eyes slightly convergent below and com- 

 prising nearly two-thirds total width of head ; face polished, slightly 

 impressed each side of middle, weakly punctate in impressions; 

 malar space opaque, distinctly shorter than basal width of mandi- 

 ble, weakly constricted ; mouth as broad as narrowest width of face ; 

 occipital carina convergent above with posterior margin of eye, 

 with only a small notch at its lower end, where it joins the hj'^pos- 

 tomal carina, latter rather low; temples from above flat, nearly 

 perpendicular to longtitudinal axis of body, little more than a 

 fourth as long as short diameter of eye; diameter of ocellus two- 

 thirds ocell-ocular line and distinctly longer than postoceliar line; 

 basal joint of flagellum fully eight times as long as thick. Thorax 

 and propodeum polished, nearly unsculptured ; pronotum with 

 anterior lateral carina short but high, epomia strong but not ascend- 

 ing to dorsal margin, humeral' margin weakly tumid, lower angle 

 longitudinally striate; prescutum not especially prominent, lateral 



