° PECTINICOENIA. 



dibulis apice bidentatis ; thorace relative magno, sulco marginali undique lsevi, antice intus dilatato ; 

 elytris profunde striatis, striis fundo punctulatis, interstitiis omnibus tequalibus. 

 Long. 30 millim. ; tborax 9, elytra 18 millim. long. 



Hab. Guatemala, Purula in Vera Paz 4000 feet (Champion). 



Very similar to P. brews, Truqui, in all its proportions and in the sculpture of the 

 head, the only differences in the latter being that the frontal carinee terminate long 

 before the sulcus which limits the clypeus ; the horn or tubercle of the vertex is broadly 

 sulcate behind and the depressed areae are much smoother. The thorax differs in the 

 dilated sulcus on the anterior margin and the perfectly smooth lateral fovea. The antennal 

 club has the leaflets moderately elongated and minutely sculptured in both species, and 

 the lobes of the mentum are very coarsely punctured and hairy. The elytra in both are 

 almost angularly prominent in the middle of the base, and the basal edge runs obliquely 

 backwards to the rectangular shoulders. The mesosternum is glabrous and impunctate ; 

 the flanks of the thorax densely hairy. The legs have only a few hairs ; the middle tibiae 

 two strong spines, the hinder tibiae only one. 



Although Kaup gives the punctulate-hairy sides of the elytra as one of the chief 

 characters of the genus, he admits one species (P. quitensis) which has glabrous sides ; 

 this may be included in the same section as P. championi, although it differs in some 

 important particulars. 



Several examples, found in the dense humid forest. 



OILEUS. 



Oileus, Kaup, Monogr. der Passal. p. 58; id. ibid. p. 117. 



Differs from Proculejus in the tubercle of the head being developed into a long 

 horizontal horn, with a free tip projecting beyond the edge of the clypeus, and in the 

 obsolete frontal carinee. The sole species is much larger than the Proculeji, and differs 

 from them in the slightly impressed elytral striae. The elytra are relatively longer, but 

 have the same prominence in the middle of the base and rather more obtuse shoulders. 



Kaup founded his genus Oileus in his Prodromus (Harold's Col. Hefte, v.) on a 

 miscellaneous set of species four in number, which he subsequently, in his monograph, 

 separated into three genera with new names, transferring the name Oileus to a species 

 which was not included in the original genus. It is perhaps expedient to overlook this 

 irregularity, as a shifting of the names again, according to the rules of nomenclature, 

 would only tend to increase the confusion. 



1. Oileus heros. (Tab. I. figg. 6, 6a.) 



Passalus heros, Truqui, Rev. & Mag. . Zool. 1857, p. 262. 

 Oileus heros, Kaup, Monogr. der Passal. p. 58 \ 



Hab. Mexico, Huachinango 1 (Truqui, type in coll. Salle). 



