1918.] F. H. Gravely: Passalidae of the World. 41 



margin. The marginal grooves are rudimentary, except in the anterior angles where they 

 form a pair of large circular pits punctured on the inner side. The scutellum is almost 

 entirely covered with punctures. The mesothoracic episterna resemble those of other 

 members of the genus. The mesosterrmm is matt and is entirely covered with hair-bearing 

 punctures except near the middle line behind. The metasternum is covered with 

 hair-bearing punctures, except the central area and the inner parts of the posterior 

 intermediate areas, which bear a number of hairless punctures behind. The abdominal 

 sterna are smooth. The elytra and legs resemble those of V. stemipunctatm. 



Verres corticola, (Truqui). 



Fig. V, 14, p. 34. 

 Passalus corticola, Truqui, 1857, p. 310. 



Numerous specimens from Guatemala and one from Mexico. Length 31-36 mm. 



The labrum is slightly concave in front. The mandibles resemble those of other 

 members of the genus. The central tubercle is fused with the pair of short parietal ridges to 

 form a massive protuberance, in front of which the more or less distinct frontal ridges 

 extend towards the inner tubercles at a somewhat obtuse angle to one another. The inner 

 tubercles are distinct as in V. cavicollis, but are situated on the anterior margin of the head 

 with only the angles of the clypeus visible in front of, or rather below, them. The angles of 

 the clypeus are somewhat more widely separated than the inner tubercles, and a pair of 

 rudimentary outer tubercles may perhaps be recognized in a pair of more or less tumid 

 areas connecting them. The addition to fig. v, 14, illustrates these tubercles and the 

 clypeus angle on the left side, being drawn on a larger scale than the main figure, and from 

 a more anterior position. The prothorax and mesothorax resemble those of V. furcilabris, 

 except that the scutellum is more sparsely punctured. The metasternum and elytra 

 resemble those of V. sternipunctatus. The abdominal sterna and legs resemble those of 

 other members of the gerus. 



The above mentioned species of Verres may be recognized as follows : — 



The clypeus extensive, oblique ; the inner tubercles obsolete . . . . . . 2. 



The clypeus smaller, almost vertical, or rudimentary ; the 



inner tubercles distinct . . . . . . . . . . . . 3. 



The labrum very deeply cleft ; the parietal ridges obsolete . F. furcilabris, p. 40. 

 The labrum less deeply cleft ; the parietal ridges short but 



distinct . . . . . • • • . . F. stemipunctatus, p. 10. 



The labrum very deeply cleft ; the clypeus distinct ; the apex 



of the central tubercle free ; a pair of large circular pits in 



the anterior angles of the pronotum . . . . . . F. cavicollis, p. 40. 



The labrum not deeply cleft ; the clypeus hidden and 



rudimentary ; the apex of the central tubercle not free ; 



the pronotum normal . . - . . . . . . F. corticola, p. 41. 



Genus PLATYVERRES, Bates, 1886, p. 9. 

 Type, Verres intermedins, Kaup, 187 1, p. 115. 



GT 



