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



Antennae longer than the body, densely clothed with rather long 

 projecting hairs, joints 3-11 very elongate, 2 extremely short, 3-7 

 gradually widened to the apex, 8-11 narrower. Prothorax trans- 

 verse, arcuate in front, narrowing from the obtuse hind angles 

 and obliquely sulcate on each side towards the apex, the groove 

 impinging on the narrowly retlexed margin. Elytra wider than 

 the prothorax, parallel, roughly sculptured. Tarsal claws as in 

 P. proximus. 



Length (excl. head) 4, breadth 1^ mm. 



Hab. Panama, Bugaba (Champion). 



The above description is taken from a male from Bugaba 

 in perfect condition fomid placed in the " Biologia " 

 collection under P. (Silis) nigrita, Gorh., a very different 

 Guatemalan insect. The greatly developed eyes in the 

 male bring P. hirticornis near P. medianus, from the same 

 sex of which it differs in its still longer, more serrate, and 

 densely pilose antennae, and the much less quadrate pro- 

 thorax, the sides of which are strongly and obliquely plicate 

 towards the apex, instead of at the middle. A dissected 

 female from the same locality placed (but not quoted) by 

 Gorham under P. (Silis) proximus, with the antennae formed 

 as in that insect, probably belongs to the present species, 

 the prothorax being plicate laterally much as in the type 

 of P. hirticornis. 



31. Polemius dentimargo, n. sp. (Plate VIII, fig. 61, 

 prothorax, (^.) 



Silis proxima, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, 

 p. 298 (^, nee ?). 



(^. Moderately elongate, shining, clothed with long pallid hairs ; 

 piceous or fuscous, the sides of the head before and behind the eyes, 

 the base of the mandibles, the prothorax (a narrow median vitta 

 excepted), the sutural and outer margins of the elytra, the humeri, 

 and the legs in great part (the anterior and intermediate tibiae and 

 tarsi excepted), pale testaceous. Antennae long, slender, sparsely 

 pilose. Eyes very large. Prothorax transverse, the sides ex- 

 planate and feebly reflexed, dilated into a broad subangular tooth 

 before the middle, angularly notched beliind this, and constricted 

 at the base, the hind angles acute, the base sinuate. Elytra long, 

 subparallel, wider than the prothorax, roughly sculptured. Inner 

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

 dilated at the base. 



Length (excl. head) 4i-4|, breadth IJ mm. 



