322 LAMELLICOENIA. 



The male, of which there are many examples, is readily distinguishable from the 

 same sex of the other species by the absence of thoracic fovea and marginal tubercle, 

 and by the tridentate anterior tibiae ; in all examples the thorax is free from traces 

 of marginal stria along the base, except near the angles. The female is not distin- 

 guishable, except in size, from the same sex of C. cultripes. 



The numerous specimens may, perhaps, be only degraded forms of one or other of 

 the two larger species ; some females (C. clunalis) are of similar size, and are distin- 

 guishable from C.fairmairei only by the base of the thorax being margined. One 

 male specimen in the Salle collection is labelled, in Fairmaire's handwriting, as 

 Orizabus sallmi 2 ; but its small size shows that it was not included in his description 

 and dimensions of that species. 



4. Cheiroplatys isodonoides. 



Orizabus isodonoides, Fairm. Rev. et Mag. Zool. 1878, p. 263 \ 

 Eab. Mexico, Toluca l {Salle, Edge), Mexico city, Salazar (Edge). 



A small species, similar to the preceding, but of shorter, subquadrate-ovate form, and 

 distinguished from all others of the genus by the transverse carina near the frontal 

 suture, extending from side to side in front of the eyes, and parallel to the straight 

 apical carina of the clypeus. The anterior tibiee of the male are dilated and unisinuate 

 externally. 



Subfam. ORYCTINM 



XYLORYCTES. 



Xyloryctes, Hope, Col. Man. i. p. 90, t. 2. fig. 7 (1837) ; Burmeister, Handb. der Ent. v. p. 207; 

 Lacordaire, Gen. Col. iii. p. 432. 



A genus consisting of four described species, peculiar, so far as at present known, to 

 North America, from temperate latitudes to the Isthmus of Panama, and to the West 

 Indies. 



Lacordaire is in error in stating that this genus has stridulating-strise on the propy- 

 gidium. That segment is simply punctured. 



l. Xyloryctes satyrus. 



Scarabatus satyrus, Fabr. Syst. Ent. p. 12 (177-6) 1 ; Olivier, Ent. i. 3, p. 39, 1. 11. fig. 94 2 ; Drury, 



111. Ex. Ins. i. t. 34. figg. 1, 2 ( $ ? ). 

 Xyloryctes satyrus, Bnrm. Handb. der Ent. v. p. 208 3 . 



Hab. Noeth Ameeica x 2 3 . — Mexico (Flohr), Paso de San Juan in Vera Cruz, Zimapan 

 in Hidalgo (Edge). 



The Mexican examples agree with others from the Atlantic States, except that some 

 -of them have distinctly longer elytra, and at the same time the sides of the thorax in 



