and Central American Telephorinae. 125 



broader and much smoother head, with the anterior portion 

 testaceous, the almost smooth prothorax, with more 

 thickened margins, the parallel elytra, and the less thickened 

 antennae. 



DiTEMNOMORPHUS, n. gen. 



Tarsi each with one claw cleft at tip in (^; prothorax 

 with the lateral margins bi-incised, and strongly bilamellate 

 and unispinose in (^, deeply notched at base in $ ; the other 

 characters as in the section Ditemnus of Silis. 



Type, Silis mfifrons, Gorh. 



1. Ditemnomorphus rufifrons. (Plate IX, figs. 98, ^, 99 $, 

 prothorax.) 



Silis rufifrons, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, p. 97 



Hab. Guatemala, Chiacam in Alta Vera Paz. 



One male and three females of this species are available 

 for examination. The prothorax of the male has two long, 

 backwardly-directed lobes on each side, the posterior lobe 

 narrow, hooked at the tip, and armed at the base above 

 with a still longer, slender, acute, oblique spine ; that of 

 the female has a deep oblique notch in front of the acute 

 hind angles. The head, prothorax, and scutellum are 

 rufo-testaceous, and the rest of the surface is piceous or 

 black. The mandibles are bent in the female. 



Parasilis. 



Parasilis, Gorham, Biol. Centr.-Am., Coleopt. iii, 2, p. 307 

 (1885). 



This genus is based upon two allied forms from Chiriqui, 

 Panama. The diagnosis and remarks on the structural 

 characters must have been taken from the females of P. 

 colypJioides (the specimens marked " ? male " by Gorham 

 being also of that sex) ; there are, however, five males in 

 the " Biologia " series before me. The males of both 

 species have one of the tarsal claws of each foot cleft, the 

 sides of the prothorax obliquely plicate and angularly 

 notched at the middle, the eyes a little larger and more 

 prominent than in the female, and the last ventral segment 

 divided to the base. The very slender filiform antennae, 

 with elongate second joint, the coarsely punctured, parallel- 



