of the Genus Go\oh. 139 



transverso, antice modice contracto, postice parum sinuato, 

 angulis posticis distinctis, coruu sat angusto, antrorsum oblique 

 producto, subtus arcuato, excavato, dense flavo-hirto, apice 

 acuminato, hand clavato, pronoto ubique dishncte punctato ; 

 scutello lato, linea profunda augulata punctisque irregularibua 

 impresso ; elytris opacis, subtiliter punctatis, stria profunda 

 suturali aliisque obsoletis gemiuatis ; pygidio fere omnino 

 rugoso, subtus medio grosse punctato ; pedibus anticis modice 

 elongatis, tibiis tridentatis ; mandibulis apice iutegris, truncatis, 

 extus subtiliter sinuatis. 

 Long. 35-49 mm. ; lat. max. 19-25 mm. 



Hab. Colombia : Cauca Valley. 



Numerous male specimens were found by Mr. W. E. Pratt. 

 The British Museum is indebted to Colonel F. Winn Sampson 

 for this addition to the collection. 



Although varying considerably in colour from a deep 

 brick-red to nearly black it is always of a sombre shade, 

 which distinguishes it from all the other species of Golofa, 

 Avith the exception of the quite dissimilar G. imbellis, Tlioms. 

 The armature of the male is also quite distinctive, the 

 thoracic horn being more directed forward than usual, and 

 in the series of 45 specimens I have examined showing much 

 less than the normal degree of variation in its length, which 

 in the best-developed specimens is about equal to that of the 

 .pronotum in the middle. It is neither dilated at the end, 

 as in (r. claviger, L., and allied species, nor very slender, as 

 in G. cegeon, eacus, &c., and the species may probably be 

 regarded as representing a primitive type showing the nearest 

 approximation to Spodistes and other allied genera. The 

 pronotum is distinctly and fairly evenly punctured, and 

 the elytra moderately strongly, especially near the suture. A 

 small but distinctive feature is the deep angular groove, not 

 composed of punctures, always found upon the scutellura. 

 This occurs also in G. claviger, but is absent in G. humboldti 

 and inconstant in other species. The hairy clothing of the 

 base of the pygidium aud the lower surface of the body is 

 short and inconspicuous, and the stridulatory ridges of the 

 propygidium are tine and regular towards the margin of the 

 segment and much better developed than in G. eacus. 



Golofa argentina, sp. n. 



cS . Castaneo-rufa, capite, pronoti medio, sutura, tibiis tarsisque 

 plus minusve infuscatis ; capite cornu gracili, recurvato, apice 

 acuto, armato, clypeo angustato, apice bilobato, vertice grosse 

 punctato; prothorace brevi, sat lato, polito, minute sat sparse 

 punctato, antice medio circulariter excavate et dense fulvo-hirto, 



