96 Mr. G. C. Champion's Revision of the Mexican 



33. Polemius xanthoderes, n. sp. 



(J. Comparatively short, shining, clothed with rather coarse 

 cinereous pubescence; black, the sides of the head in front, the 

 mandibles, the two basal joints of the antennae beneath, the pro- 

 thorax, the tibiae to near the apex, and the tarsal claws, testaceous 

 or rufo-testaceous. Eyes small. Antennae rather stout, about 

 reaching the middle of the elytra. Prothorax shprt and broad, 

 transversely subquadrate, the margins narrowly reflexed, angularly 

 notched at the middle, and slightly thickened in front of the 

 emargination. Elytra rather short, subparallel, roughly sculptured. 

 Inner claw of anterior tarsi, and outer claw of the other tarsi, 

 simply dilated at base. 



Length (excl. head) 3-3|, breadth IrV-li mm. 



Hah. Mexico, Tierra Colorada in Guerrero (H. H. 

 Smith). 



Two males. A very small shining insect, with a broad, 

 transversely subquadrate, mesially notched prothorax in 

 the male, and comparatively short elytra, the prothorax 

 and the tibiae in part testaceous, the rest of the surface 

 almost entirely black. Amongst the species described by 

 Gorham P. xanthoderes is perhaps nearest related to P. 

 (Silis) minutus. 



34. Polemius cavicollis, n. sp. 



cj. Comparatively short, shining, thickly pubescent; black, the 

 points of insertion of the antennae, the mandibles, and prothorax 

 (a transverse patch on the disc at the base excepted) testaceous. 

 Eyes moderately large. Antennae long, nearly reaching the apex 

 of the elytra, closely j^ilose. Prothorax small, transverse, hollowed 

 down the middle behind, rounded at the sides, the margins explanate, 

 reflexed, obliquely plicate, and deeply sinuate before the prominent 

 hind angles. Elytra rather short, subparallel, and roughly sculp- 

 tured. Inner claw of anterior tarsi, and outer claw of the other 

 tarsi, feebly dilated at base. 



Length (excl. head) Sf, breadth \\ mm. 



Hah. Mexico, Rincon in Guerrero, 2800 ft. {H. H. 

 Smith). 



One male. A little more elongate than P. xanthoderes 

 {(^), the eyes larger, the antennae much longer, the legs 

 wholly infuscate, the prothorax rounded at the sides, the 

 latter hollowed and obliquely plicate behind the middle, 

 the hind angles prominent, the disc deeply excavate pos- 

 teriorly. 



