8 PECTINICOENIA. 



TRLENUKGUS. 



Gen. Proculejo affinis ; diflert elypeo quadridentato etc. Oblongus, convexus, elytris relative brevibus undique 

 glabris, humeris valde prominentibus. Clypeus quadridentatus, dentibus intermediis inter se valde distanti- 

 bus ; sulco transverso nullo. Cornu verticis elongatum, apice liberum, una cum tuberculis basalibus validis 

 liberisque tridentem elevatum horizontalem efficiens ; carina? frontales nullse. Thorax convexus. sulculo 

 marginali punctato, antice intus paullo dilatato et a margine recedenti. Elytra valde punctulato-sulcata, 

 interstitiis subconvexis et inaequalibus, 7° angustissimo. Tibiae intermedia? valide unispinosse spinisque 

 duabus minutis, carina superiori ciliata ; posticae xmispinosae. Antennarum clava longe trilamellata. 



In its quadridentate clypeus this genus agrees with Pseudacanthus, Kaup, the typical 

 species of which I have not seen. The two forms must, however, be generically distinct, 

 as Kaup says of Pseudacanthus that the antennalleaflets are " ziemlich kurz." 



1. TriaBimrgus subopacus. (Tab. I. figg. 8, 8a.) 



Sat elongato-ovatus, valde convexus, politus ; elytris fere opacis, valde punctato-sulcatis, interstitiis convexis, 

 insequalibus, 6° 7°que angustioribus ; thoracis fovea laterali laevissima ; mesosterno lateribus punctatis; 

 metasterno lateribus late punctulato-pubescentibus, apice utrinque plaga grosse punctata. 



Long. 36 millim. ; tborax 11, elytra 19 millim. long. 



Hal. Guatemala, Totonicapam {Champion). 



Two examples, found beneath pine bark at an elevation of about 10,000 feet. 



C. Antennal leaflets very short. 



PSEUDACANTHUS. 



Pseudacanthus, Kaup, Monogr. der Passal. p. 73. 



Kaup's definition of this genus is not satisfactory, and although I have not seen the 

 typical species (P. mexieanus) I doubt whether his second species (P. laticornis) can 

 remain associated with it. His third species (P. aztecus) is certainly not congeneric 

 with P. laticornis. In the doubt concerning the form of the base of the elytra and the 

 length of the antennal leaflets of the typical species, it seems advisable to leave 

 P. laticornis at present in the genus. All the species are from Mexico. 



1. Pseudacanthus mexieanus. 



Passalus mexieanus, Truqui, Eev. & Mag. Zool. 1857, p. 315 \ 

 Pseudacanthus mexieanus, Kaup, Monogr. der Passal. p. 73, t. 4. f. 1 2 . 



Hob. Mexico \ Vera Cruz 1 2 . 



No specimen of this species has reached us. One named P. mexieanus in the Salle 

 collection, as before mentioned, is a Proculejus. 



2. Pseudacanthus (?) laticornis. (Tab. I. figg. 9, 9a.) 



Passalus laticornis, Truqui, Rev. & Mag. Zool. 1857, p. 316. 

 Pseudacanthus laticornis, Kaup, Monogr. der Passal. p. 74. 



Eab. Mexico 1 , Jacale (Salle). 



