LIOGENYS. 155 



Liogenys is so closely linked to Diplotaxis by finely graduated forms and the structure 

 is so nearly identical, that there is no reason for the sharp separation of the two genera 

 as hitherto made in classifications of the Melolonthidse. 



LIOGENYS. 



Liogenys, Guerin, Voy. de la Coquille, Zool. ii., Col. p. 84 (1838); Burmeister, Handb. der Ent. 

 iv. 2, p. 12 (1858); Lacordaire, Gen. Col. iii. p. 268 (1856). 



An exclusively American genus, extending from Mexico to Chili, but apparently not 

 continued into temperate North America. About twenty species have been described. 



1. Liogenys quadridens. 



Melolontha quadridens, Fabr. Ent. Syst. Suppl. p. 131. 

 Liogenys quadridens, Burm. Handb. der Ent. iv. 2, p. 14 \ 

 ? Liogenys quadridentatus, Blanch. Cat. Coll. Ent. i. p. 168 2 . 



Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet {Champion). — South America, 

 Colombia and Guiana 1 , Amazons, Monte Video 2 . 



2. Liogenys morio. 



Liogenys morio, Burm. Handb. der Ent. iv. 2, p. 16 1 . 

 Hab. Central America 1 . 

 I have seen no species answering Burmeister's description. 



3. Liogenys macropelma. (Tab. ix. fig. 19.) 



Oblongus ( 5 magis ovata), minus convexus, niger vel castaneus, supra et subtus nudus nitidus, subtus et 

 pedibus rufo-piceis, antennis testaceo-fulvis ; sat grosse disperse punctatus ; capite mox ab oculis 

 angustato, clypeo late obtuse bidentato, cum fronte concavo ; elytris geminato-punctato-striatis ; pygidio 

 magno, subplano, apice late subtruncatim rotundato, grosse sed baud dense punctato ; ventris segmentis 

 2°-5 m longis, fere sequalibus, 6° mediocriter elongato : antennarum clava birsuta." 



$ . Pedes elongati, graciles ; tarsi postici graciles, subtus dense birsuti, articulo 1° sequente plus quam 

 dimidio breviore ; tarsi quatuor anteriores articulis 2°, 3° et 4° basi paullo dilatatis, l°-4 m subtus palmatis, 

 densissime pilosis. 



5 . Pedes et tarsi mediocriter elongati, horum articulis subtus minus dense pilosis, baud dilatatis. 



Long. 10-11 millim. 



Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 

 Numerous examples. 



4. Liogenys pubisternis. (Tab. IX. fig. 20.) 



L. pdlpali similis et afflnis, convexus, testaceo-ruf us, supra glaber nitidus, sternis femoribusque longissime 

 fulvo-birtis ; capite ab oculis rotundato- angustato ; clypeo producto, late bidentato, supra concavo 

 sparsim punctato ; thorace disperse punctato ; elytris sat crebre punctulatis utrinque costulis angustis 

 parum elevatis quatuor. Tarsi postici articulo 1° sequente paullo breviore. 



XX 2 



