and Central American Telephorinae. 49 



Rather broad, black, the anterior margin of the head, the mandibles 

 in part, a broad oblique submarginal stripe on each side of the 

 prothorax, and sometimes the last two ventral segments, yellow. 

 Eyes not prominent. Antennae short, stout, serrate, tapering 

 towards the tip. Prothorax strongly transverse ; in (J subquadrate, 

 widened posteriorly, and with a deep, narrow, abrupt notch on 

 each side just behind the middle ; in $ broader, explanate, the sides 

 rounded, sinuate at about the middle. Elytra more or less explanate 

 from a little below the shoulder. Inner claw of anterior tarsi 

 broadly lobed, and outer claw of the other tarsi split, in c^. 



cJ. Internal sac, as seen evaginated, disclosing an extremely long, 

 acuminate, bisinuate flagellum, a shorter, stout, curved tube beneath 

 it, and three very long, hook-like processes on each side. (Figs. 16, 

 16a.) 



Hab. Guatemala, Duenas and Purula. 



In the pair from Duenas the last two ventral segments 

 are flavescent, the smaller example ($) from Purula having 

 the abdomen black. The intermediate tarsal claws are 

 now wanting in the unique male, but Gorham says the 

 outer one is not lobed. The Mexican Polemius nigro- 

 fnarginatus and P. nigrolimbatus are similarly coloured 

 forms, but the males of these insects have one of the 

 claws of each foot simply lobed at the base, and none of 

 them cleft. 



39. Discodon melancholicum. 



Discodon melancliolicum, Gorh., Biol. Centr.-Am., Coleopt. 



iii, 2, p. 81 (excl. Parada specimen). 

 Discodon triste, Gorh., loc. cit. pp. 82, 287 (specimens from 



Guanajuato and San Luis Potosi only). 



Rather shining, black, the prothorax usually in part flavous or 

 rufescent at the sides (leaving a large cruciform black patch or 

 median vitta on the disc black), in some specimens entirely black. 

 Antennae (cJ) long, subserrate, closely set with short bristly hairs, 

 slightly tapering towards the tip; (?) shorter and more slender, 

 sparsely pilose. Prothorax of cj with the sides slightly notched 

 at about the middle and subparallel thence to the rectangular hind 

 angles, of $ moderately explanate and very feebly sinuate, and 

 with the hind angles obtuse. Elytra about as wide as the pro- 

 thorax at the base, and at most very feebly explanate. Inner claw 

 of anterior tarsi broadly lobed, and outer claw of the other tarsi 

 cleft at the tip, in ^. 



cJ. Eighth ventral segment carinate, rounded and feebly cleft at 

 TRANS. ENT. SOC. LOND. 1915. — PART I. (MAY) E 



