CETONIINVE 341 



Basal angles prominent, abruptly shining, generally but not always 

 subisolated by an obliquely impressed line 4 t 



3 Body stout and massive, the basal thoracic angles broadly rounded; 

 mes-epimera very feebly convex and not prominent from above, 

 the elytra broadly convex, each with two feeble costules as in 

 Cetoniini. [Type Ps. leucosticta Burm.] Psilocnemis 



Body narrow and elongate, the basal thoracic angles obtuse but not 

 broadly rounded; mes-epimera greatly visible from above, tumid; 

 elytra abruptly flat on the disk, not bicostulate. [Type G. velutinus 

 Westw.] Genuchinus 



4 Legs long, the anterior tarsi distorted; head elevated and cariniform 

 along the sides and deeply transversely fossate at base; elytra with 

 the deplanate discal part margined each side by an elevated ridge; 

 body rather large in size. [Type Cremast. planatus Lee.]. 



Macropodina 



Legs short, the anterior tarsi not distorted; head not elevated along the 

 sides or transversely fossate at base; elytra sometimes nearly flat 

 but never having a sublateral abruptly elevated ridge; pronotum 

 without trace of marginal beading as in Macropodina. [Type C. 

 castanece Knoch] Cremastocheilus. 



5 Body rather slender, parallel, the elytra convex laterally; legs short,, 

 the tarsi regular, nearly as in Cremastocheilus. [Type Cremast.. 

 saucius Lee.] Trinodia 



The vast majority of the species belong to the last two genera of 

 the table and Genuchinus is the only genus that extends far to the 

 southward and into South America. The South American 

 Cyclidius of MacLeay is not defined above, as I only have elongatus. 

 Oliv., at present and there are apparently two genera confounded 

 among its few described species. 



Psilocnemis Burm. 



Although suppressed for some unaccountable reason by Dr. Horn 

 in his revision of Cremastocheilus (Proc. Am. Phil. Soc., 1879, p. 382), 

 this genus is amply valid. The body is more ventricose than in 

 any other, the head and prothorax being rather small in comparison 

 with the hind body. The mentum is unusually large and trans- 

 verse, nearly flat at the bottom, with strongly reflexed posterior 

 edge, which is feebly and posteriorly lobed at the middle, the 

 anterior margin broadly, transversely subtruncate, the lateral 

 angles well marked but not sharp and the surface highly polished 

 and sculptureless; the vertical anterior surface of the reflexed 

 clypeal apex forms a large polished plate adjoining the anterior 

 margin of the mentum and having its lower edge sharply defined, 



