and Central American TelepJiorinae. 123 



The general shape of the prothorax, however, approaches 

 that of the same sex of S. appendicularis, it being small, 

 strongly transverse, much narrowed anteriorly, and dilated 

 into a prominent thickened blunt tooth at some little 

 distance before the obtuse hind angle. The two other 

 specimens ($), from the same locality, doubtfully referred 

 by Gorham to S. aurita, probably belong to his S. pauxilla, 

 a variable insect ranging from Vera Paz to Chiriqui, and 

 (like S. erythroderes) here placed under Discodon. 



35. Silis chalybeipennis. (Plate IX, fig. 97, prothorax, ^J.) 



Silts chalybeipennis, Gorh., Biol. Centr.-Am., Coleopt. iii, 

 2, p. '300, pi. 12, fig. 18 (?). 



Hab. Panama, Volcan de Chiriqui, 4000-8000 ft. 



Recognisable by the testaceous head, antennae, palpi, 

 prothorax, and scutellum, the metallic blue elytra, and the 

 black under surface and legs. The prothorax has a very 

 deep abrupt notch in front of the acute, dentiform hind 

 angles in each sex, and the broadly explanate lateral 

 margins are also hollowed or constricted behind the middle, 

 this being more noticeable in the female than in the male. 

 The inner claw of the anterior tarsi, and the outer claw of 

 the intermediate tarsi, are dilated at the base in the male. 

 Six examples seen. S. chalybeipennis should perhaps 

 form the type of a new genus. 



The following species cannot be definitely placed till 

 the males are found. 



36. Silis sicula. 



Silis sicula, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, p. 298 



Hab. Guatemala, Purula in Vera Paz. 



This species, described from two females (one now without 

 antennae), may be known, at least in $, by its rather 

 coarsely, densely, subseriately punctate elytra; the small, 

 strongly transverse prothorax, with testaceous disc and 

 nigro-piceous margins, and the lateral margins sinuate 

 and reflexed ; the rather stout, tapering antennae ; and 

 the abruptly bent mandibles. S. sicula will probably 

 prove to belong to Polemius as here understood. 



