and Central American Telephorinae. 119 



Hab. Mexico, Jalapa, Tapachula ; Guatemala, San Juan 

 in Alta Vera Paz, Zapote, Cerro Zunil ; Costa Rica, Irazu ; 

 Panama, Volcan de Chiriqui [types], Boquete, Bugaba. 



A widely distributed variable insect, occurring on both 

 the Atlantic and Pacific slopes. It may be separated from 

 S. ardua (at least in the typical form) by the narrowly 

 fusco-vittate prothorax, which is more rounded at the sides 

 and more constricted before the base in the male, and the 

 pale apical joints to the antennae; and from Polemius 

 pauperculus by the abruptly bent mandibles of the female 

 and the differently shaped prothorax of the male. In 

 S. ohlita the antennae and elytra are variable in colour, 

 being sometimes wholly fuscous or piceous, and the pro- 

 thorax is occasionally immaculate. Gorham's description 

 is contradictory as it stands : the mandibles of the female 

 are said to be strongly curved in the diagnosis and bent in 

 the general description ; the male labelled by him as type 

 has the sutural and elytral margins testaceous, of which 

 nothing is said in the description. The types were from 

 Chiriqui, the examples from the more northern localities 

 not being quoted. Thirty-eight specimens are before me, 

 including many males. Two of the three females from 

 Cerro Zunil, those with immaculate prothorax and dark 

 antennae, were enumerated by him under S. pauxilla, an 

 insect here referred to the genus Discodon. 



27. Silis scabripennis, n. sp. (Plate IX, fig. 89, 

 prothorax, ^.) 



Moderately elongate, shining, finely pubescent; black, the 

 anterior portion of the head, the mandibles, and prothorax testaceous 

 or flavo -testaceous. Eyes very large in c^, a little smaller in $. 

 Antennae long and slender, slightly shorter in $. Prothorax ((J) 

 small, much broader than long, rounded at the sides, constricted 

 anteriorly and before the base, the margins reflexed, plicate, and very 

 narrowly, obliquely excised behind the middle (the margin in front 

 of the notch acute or toothed and the portion posterior to it tri- 

 angular), the hind angles obtuse ; (?) broader, less narrowed behind, 

 the margin sinuate, thickened, and subangularly dilated anteriorly, 

 the hind angles acute and prominent. Elytra wider than the 

 prothorax, moderately long, subparallel, roughly sculptured and 

 faintly costate. Inner claw of anterior tarsi angularly, and outer 

 claw of the other tarsi more feebly, dilated at base in (^. 



Length (excl. head) 4i-4|, breadth H mm. (cJ ?.) 



