12 PBOCEEDINGS OF THE NATIONAL MUSEUM vol.78 



Subgenus Polycyrtus Spinola 



Polycyrtus Spinola, Ann. Soc. Ent. France, vol. 9. 1840, p. 154. Genotype. — 



Polycyrtus histrio Spinola. 

 Polycyrtimorpha Viereck, Proc. U. S. Nat. Mus., vol. 46, 1913, p. 383. 



Genotype. — Polycyrtimorpha amoenus Viereck. 



As here treated this subgenus is a somewhat heterogeneous group 

 that might, perhaps, be divided into two or more subgenera. The 

 group comprising the last five species, characterized by the complete 

 apical carina and apophyses reduced to higher portions in the carina, 

 is apparently as distinct from the rest of the species as is the sub- 

 genus Cryptanuridimorpha although the character is not intrinsically 

 so strong. Similarly carinispinis, bulhosus, inf?'actus, and ruflpleuris 

 apparently are isolated examples of other minor groups that might, 

 I^erhaps, be elevated to subgeneric rank. 



The unavailability of the complete or incomplete occipital carina 

 as a generic or even a subgeneric character, as used by Viereck to 

 separate his Polycyrtimorpha from Polycyrtus^ is demonstrated by 

 the fact that it would divide the otherwise compact group of s^De- 

 cies with complete apical carina. In the foregoing key to species 

 I have used this character in a modified form for the separation 

 of species or small groups of species. 



7. POLYCYRTUS (POLYCYRTUS) ORNATIFRONS, new species 



Female. — Length 13 mm. 



Vertex in front view deeply concave; frons with scrobes deep 

 but not defined on inner side; horn slender with apex rounded and 

 with two pits on frons above its base; face distinctly punctate, 

 longitudinally impressed on each side of middle; eyes convergent 

 below, comprising nearly two-thirds width of head at level of 

 antennae; malar space distinctly shorter than basal width of man- 

 dible, constricted, mouth a little wider than narrowest width of 

 face; temples in side view very narrow, occipital carina convergent 

 above with posterior margin of eye, prominent below and separated 

 from hypostomal carina by a deep groove; temples from above con- 

 cave, weakly oblique, less than a third as long as short diameter of 

 eye; diameter of an ocellus nearly three-fourths as long as ocell- 

 ocular line and nearly twice postocellar line; basal joint of flagel- 

 lum about seven times as long as thick. Thorax polished, 

 mesopleurum sparsely punctate, metapleurum obliquely rugose ; pro- 

 notum with a high elevation on its anterior lateral margin sur- 

 mounted by a high carina, epomia wanting; prescutum rather low, 

 lateral lobes somewhat flattened; scutellum high, compressed; 



