332 LAMELLICOENIA. 



5. The horn still shorter ; the thoracic elevation advanced nearer to the front margin, 

 with a glabrous fovea in front. 



Fairmaire has proposed (Rev. et Mag. Zool. 1878, p. 266) to reverse the decision of 

 Eeiche, who referred Scarabceus barbicomis, Latr., to the prior S. agenor of Olivier, 

 and to regard it as synonymous with Podischnus tersander, Burm. In this I cannot 

 help disagreeing with him, as the description and figure of Latreille apply exactly to 

 the minor development described above (No. 3) of P. agenor, and do not at all agree 

 with the other species. Fafrmaire appears to have been misled chiefly by the simple 

 and flattened (from front and rear) cephalic horn of Latreille's figure ; but this is the 

 condition of the horn of P. agenor in minor developments, and the base is similarly 

 flattened even in fully-developed males. As to the general form of the body, the figure 

 of Latreille is that of an elongate-oblong insect like P. agenor, and not of a short and 

 posteriorly-dilated species like P. tersander. The thoracic horn of the figure is also 

 totally unlike the form assumed by P. tersander in any of its developments. 



We figure two males from Chontales, and a male minor and a female from Lion 

 Hill, Panama. 



2. Podischnus tersander. (Tab. XX. figg. 1, la, 6; 2,2 a, ? .) 



Podischnus Tersander, Burm. Handb. der Ent. v. p. 239 \ 



Mixigenus Leander, Thorns. Arcana Naturae, p. 7 2 . 



Mixigenus barbicomis, Fairm. Rev. et Mag. Zool. 1878, p. 266 (nee Latr.) 3 . 



Hah. Mexico 123 , Orizaba (Salle) ; Nicaragua, Chontales (Belt). 



Fairmaire retains Thomson's genus Mixigenus for this species, but does not specify 

 the points of structure in which it differs from Podischnus. The two species, in fact, 

 agree unusually well in all characters on which genera are founded in Dynastidse. The 

 structure and armature of the legs are strikingly homogeneous, especially the sharply- 

 toothed (instead of bristly) transverse ridges of the four hinder tibiae. 



We figure a male and a female from Orizaba. 



GOLOFA. 



Golofa, Hope, Trans. Ent. Soc. Lond. ii. p. 42 (1837) ; Burmeister, Handb. der Ent. v. p. 246; 

 Lacordaire, Gen. Col. hi. p. 443. 



This fine genus, one of the most remarkable forms of Dynastidee found in the New 

 World, is widely distributed over the tropical zone of the American continent, and is 

 recorded, though possibly in error, as found in Chili. Fourteen species have been 

 described ; but some of them are founded on varieties, the species being subject to 

 more than the usual range of modification as regards the shape of the horn-like 

 processes of the head and thorax, and the size and colour are equally variable. 



