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



6^. Prothoracic margins compressed at 



middle and notched in front of 



the hind angles Species 56-58. 



III. Anterior and intermediate tarsi with one 

 of the claws broadly lobed at base, and 

 the posterior tarsi with one claw cleft ; 

 prothoracic margins notched at or be- 

 hind middle : species large, Lampyri- 

 form or Telephoriform Sjjecics 59-64. 



Section I. 



1. Discodon erosum. 



Discodon erosum, Gorh., Biol. Centr.-Am., Coleopt. iii, 2, 

 p. 79 ((^ $) (excl. the var. from Cuernavaca, (^) {nee 

 p. 285). 



Elongate, shining, finely pubescent; black, the head (eyes 

 excepted), the base of the mandibles, the prothorax, scutellum, 

 coxae, and trochanters, and the femora to near the apex, flavous 

 or fiavo -testaceous. Eyes moderately large and prominent in ^, 

 smaller in $. Antennae very long, filiform. Prothorax trans- 

 verse, bicallose on the disc behind, with strongly reflexed, sinuate 

 margins ; the latter with an oblique notch near the base in (J, and 

 an abrijpt arcuate emargination at the basal third in $. Elytra 

 very long, subparallel, wider than the prothorax. Inner claw of 

 anterior tarsi cleft at tip and broadly, acutely triangularly dilated 

 at base, and the outer claw of the other tarsi deeply cleft, in q. 



cJ. Eighth ventral segment broad, short, produced on each side 

 at the apex into a long, oblique, inwardly-directed, stout, spiniform 

 process, the tips of the two processes nearly meeting (fig. 3) ; [ninth 

 segment injured by dissection] the evaginated internal sac disclosing 

 numerous spines and a pair of stout, elongate hooks (fig. 3a), two 

 other long, stout hooks remaining within the cavity. 



Hab. Mexico, Toxpam and Cordova in Vera Cruz. 



Redescribed from the pair from Vera Cruz named by 

 Gorham, who did not observe the double modification of 

 the inner anterior tarsal claw, etc., of the male. D. erosum 

 must be taken as the type of Discodon, one claw of each 

 tarsus being cleft in (^ ; but the fissure of the claw of the 

 anterior pair is not easily seen till the tarsus is removed. 

 The so-called variety from Cuernavaca is a very different 

 insect. 



