PHILEUBUS. 341 



B. Anterior tibiw quadridentate. 



8. Phileurus didymus. 



Scarabceus didymus, Linn. Syst. Nat. i. 2, p. 545 ; Oliv. Ent. i. 3, p. 42, t. 2. fig. 9. 



Phileurus didymus, Burm. Handb. der Ent. v. p. 158. 



Phileurus bajulus, Casteln. Hist. Nat. Ins. Col. ii. p. 116 (nee Perty). 



Phileurus affinis, Reiche, Ann. Soc. Ent. Fr. 1859, p. 12 (nee Burm.). 



Hab. Mexico, Cordova {Salle, Hoge), Toxpam (Salle), Jalapa, Tapachula in Chiapas 

 (Hoge), Temax in North Yucatan (Gaumer) ; Guatemala, Cerro Zunil (Champion); 

 Nicaragua, Chontales (Belt, Janson) ; Costa Rica ( Van Patten) ; Panama, Volcan de 

 Chiriqui 2000 to 3000 feet (Champion). 



Varies in size from 28 to 50 millim. The thoracic tubercle on the fore margin 

 followed by a broad depression, from which commences the dorsal sulcus, are constant 

 characters in all the examples ; but the quadridentate anterior tibiae is subject to 

 exceptions, as the upper tooth is sometimes scarcely perceptible, or disappears alto- 

 gether. The tridentate P. affinis, Burm., which is reunited by Reich e and Gemminger 

 and Harold as a var. to P. didymus, is, however, probably a distinct species, as it differs in 

 the absence of the broad pit behind the thoracic tubercle, whilst the P. affinis described 

 by Reiche as distinct is clearly the same as P. didymus, the absence of a scutellar stride, 

 adduced as the sole character, being of common occurrence in the species. 



9. Phileurus microps. 



Phileurus microps, Burm. Handb. der Ent. v. p. 161 \ 

 Hab. Mexico 1 (Salle, ex coll. Sturm). 



A single example from Sturm's collection, agreeing very well with Burmeister's 

 description. 



10. Phileurus valgus. 



Scarabceus valgus, Linn. Syst. Nat. i. (2) p. 546 ; Oliv. Ent. i. 3, p. 43, t. 17. fig. 160. 



Phileurus valgus, Burm. Handb. der Ent. v. p. 160 1 ; Horn, Trans. Am. Ent. Soc. viii. p. 147 



(1880) \ 

 Phileurus castaneus, Haldem. Proc. Ac. Phil. i. p. 304. 



Hab. North America, Texas 2 . — Mexico, Jalapa (Hoge), Temax in North Yucatan 

 (Gaumer)-, Guatemala, El Eeposo (Champion). — South America, Colombia to S. Brazil 1 ; 

 West Indies \ 



Var. P. capra (Dej., coll. Salle). Major (28 millim.), tibiis 4 posticis extus medio fortius denticulatis spinisque 

 apicalibus longioribus, elytrorumque interstitiis haud altematim elevatis. 



Hab. Guatemala, Yzabal (Salle). 



The largest examples of this species are distinguished from the smallest of P. didymus, 



