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



37. Silis omiltemia, n. sp. 



$. Elongate, rather shining, black, the mandibles and pro thorax 

 (a narrow median vitta and the outer and anterior margins excepted) 

 rufo-testaceous ; somewhat thickly clothed (the antennae included) 

 with fuscous pubescence, the hairs on the rufescent portion of the 

 prothorax yellowish. Head broad ; mandibles stout, abruptly 

 bent ; antennae rather slender, subfiliform, about reaching the basal 

 third of the elytra. Prothorax short, strongly transverse, depressed 

 down the middle behind, somewhat dilated posteriorly, the margins 

 rather broadly explanate, reflexed, sinuate, and constricted at the 

 base, the hind angles prominent. Elytra very elongate, wider than 

 the prothorax, sinuate at the sides (perhaps due to shrinkage after 

 death), rather roughly sculptured and obsoletely costate. 



Length (excl. head) 7, breadth 2\ mm. 



Hah. Mexico, Omilteme in Guerrero, 8000 ft. {H. H. 

 Smith). 



One example. Larger and broader than the Guatemalan 

 S. sicula, Gorh. ; the mandibles bent as in the female of 

 that species, but stouter; the elytral sculpture not nearly 

 so coarse and more confused; the antennae subfiliform. 

 The prothorax is very short and has a dark reflexed margin 

 as in S. sicula, a median vitta, however, being present in 

 S. omiltemia. Till the male is discovered the Guerrero 

 insect is perhaps best placed under Silis. 



38. Silis lissoderes, n. sp. 



$. Moderately elongate, shining, fusco -pubescent ; black, the 

 front of the head, the mandibles, and the sides of the prothorax 

 broadly (leaving a basally and apically dilated broad black patch 

 on the disc), testaceous. Eyes small. Mandibles abruptly bent. 

 Antennae rather slender, short, barely reaching the basal third of the 

 elytra, pilose. Prothorax short, strongly transverse, gradually 

 narrowed anteriorly, the margins moderately explanate, thickened, 

 and constricted in front of the acute hind angles, the surface almost 

 smooth. Elytra moderately long, wider than the prothorax, 

 parallel, densely, rather finely sculptured and obsoletely costate. 



Length (excl. head) 4|-5, breadth 1| mm. 



Hah. Mexico, Cuernavaca in Morelos [H. H. Smith). 



Two females. This insect seems to be allied to S. 

 sepulchralis, Gorh., from the Guatemalan mountains, 

 differing from the corresponding sex of that species in the 



