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



Moderately elongate, shining, finely pubescent; piceous or 

 fuscous, the head in front and at the sides behind, the mandibles, 

 the sides of the prothorax narrowly, the sutural and outer margins 

 of the elytra, the femora to near the apex, and the intermediate and 

 posterior tibiae in part or entirely, testaceous. Eyes very large in 

 (J, much smaller in $. Mandibles abruptly bent in $. Antennae 

 rather closely pilose in both sexes, long in (^, a little shorter in $, 

 joint 2 small. Prothorax ((J) transverse, narrowed behind, the 

 margins reflexed, plicate, and shallowly notched at the middle, the 

 hind angles not prominent; ($) widened posteriorly, the margins 

 feebly sinuate and explanate to the base, the hind angles prominent. 

 Elytra long, subj)arallel, wider than the prothorax, roughly sculp- 

 tured. 



Length (excl. head) 4|-5, breadth l^-l^^ mm. (cj $.) 



Hab. Panama, slopes of the Volcan de Chiriqui. 



Kedescribed from three males and six females. The 

 mandibles of the female are incorrectly described by Gorham 

 in his diagnosis, as " fortiter curvatis," as shown by the 

 $ of S. ardua dissected by him and his comparative remarks 

 on that species under S. sicula, the organs in question being 

 abruptly bent, as in the same sex of the last-named insect 

 and S. ohlita. S. ardua is a little more elongate than 

 S. ohlita; the antennae are infuscate, or have at most the 

 apical joint paler; and the prothorax has the lateral 

 margins, and the elytra the sutural and outer margins, 

 testaceous. 



24. Silis bugabensis. 



$. Silis bugabensis, and var. apicipennis, Pic, Melanges 

 exot.-entom. fasc. v, pp. 4, 5 (March 1913). 



Silis lineata, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, p. 296 

 {nee p. 95). 



Silis lineola, Gorh., loc. cit. p. 296 (part.) (Panama speci- 

 men). 



Moderately elongate, rather shining, somewhat thickly pubescent, 

 the pubescence ochreous on the flavous portions of the surface; 

 nigro-piceous or black, the antennae with from 1-4 of the outer 

 joints, the head and prothorax (a broad continuous median vitta 

 excepted), the elytra (except the suture to a greater or less extent, 

 and often the apical half also [var. apicipennis]), and usually the 

 base of the femora, flavo -testaceous. Eyes large in ,$, smaller in $. 

 Antennae slender and nearly reaching the apex of the elytra in (J, 

 shorter in $. Prothorax {^) a little broader than long, rather 



