BOTHYNTTS. 319 



BOTHYNUS. 



Bothynus, Hope, Col Man. i. p. 95 (1837) ; Burmeister, Handb. der Ent. v. p. 115, § II. (1847) ; 

 Lacordaire, Gen. Col. iii. p. 413. 

 A genus containing five described species from South America. It is very insuffi- 

 ciently distinguished by the authors above cited from Scaptophilus, of which eleven 

 species from the same region and from the West Indies have been described. With 

 Corynoscelis, Burm., the three genera form a small group, distinguished from Ligyrus and 

 its allies by the propygidium being more or less strongly produced in the middle, and 

 restricting the length of the pygidium, and its surface being scored in both sexes with 

 line transverse striae as part of the stridulating-apparatus. 



1. Bothynus quadridens. (Tab. XVIII. fig. 22.) 



Corynoscelis quadridens, Taschenberg, Zeitschr. f. d. gesammten Natnrwissensch. i. Neue Folge, 

 p. 185 \ 

 Hah. Mexico, Oaxaca (Salle), Tres Marias Is. (Forrer) ; Beitish Honduras (Blanca- 

 neaux); Panama, Chiriqui (Trbtsch). — South America; Ecuador 1 , 



c? . Tarsi antici ungue exteriore valide dentato, sed nee incrassato nee defiexo. 



Five examples. This species is possibly the Podalgus complanus, Burm. Our 

 examples agree perfectly with Taschenberg's description, except that no mention is 

 made there of an obtuse prominence in the middle of the hind margin of the confluent- 

 punctate thoracic fovea. This exists in all, except in a feebly-developed female. The 

 insect is glossy-black or piceous, with nearly smooth elytra, which at most have a 

 feebly-indicated sutural stria, and a few other faint striae near the base. 



A specimen from Tres Marias Islands is figured. 



2. Bothynus simplicitarsis. 



B. quadridenti simillima, differt solum unguibus tarsorum anticomm in tf simplicibus. Oblongus, interdum 

 latius oblongus, nigro-nitidus, subtus picescens et vulpino-rufo birtus ; mandibulis valide et acute tridentatis ; 

 capite punctato-scabroso, clypeo elongate attenuato, lateribus sinuatis, apice acute bidentatis, fronte 

 tuberculo compresso basi dilatato ; tborace mediocriter transverso, lateribus cum angulis posticis rotun- 

 datis, margine antico medio unituberculato, disco anteriore late foveato, ruguloso-punctato, foveas margine 

 poateriore medio plerumque obtusissime unituberculato, lateribus discrete punctatis, versus basin sublsevi, 

 margine basali stria paullo impresso, confuse punctato ; elytris fere laevibus, plus minusve subtiliter 

 striato-punctulatis, stria suturali baud impressa. Tibiae anticae valide 4-dentatas ; 4 posteriores extus 

 acute biearinatse carinisque extus in dentem productis, apice flexuosae, setosas. 



c? . Pygidium paullo convexum ; segmentum ultimum ventrali apice late et profunde sinuatum. Tarsi antici 

 unguibus simplicibus. 



2 . Propygidium medio minus productum ; pygidium planum vel concavum ; segmentum ultimum ventrale 

 latum, apice integrum. 



Long. 27-32 millim. <f $ . 



Hob. Guatemala, Coban in Vera Paz (Champion, Conradt). Eighteen examples. 



