346 SERKICOENIA. 



antennae and a narrower and more parallel thorax than the females. In some 

 specimens the finer interstitial punctuation of the thorax is a little coarser and closer 

 than in others. A specimen ( d ) of a Monocrepidius sent me by Mr. Wickham, from 

 Arizona, probably belongs to this species. We figure a male of M. parallelus from 

 Guanajuato. 



10. Monocrepidius annulicornis. 



Elongate, rather narrow, moderately convex ; pitchy-brown, the hind angles of the prothorax testaceous, the 

 elytra pitchy-black ; the antennae piceous, with the apical three joints and the apex of each of the others 

 testaceous, the oral organ flavous, the legs testaceous ; above and beneath thickly clothed with short, 

 fine, cinereous hairs. Head thickly, finely punctate, declivous in front, the frontal carina broadly 

 truncate; antennas slender, not half the length of the body, joint 3 nearly twice as long as 2, the two 

 together longer than 4. Prothorax considerably longer than broad, a little narrowed in front, the sides 

 slightly rounded from the middle forwards and feebly sinuate behind ; the hind angles strongly produced, 

 slightly divergent, sharply carinate at the sides above and with a sharp oblique carina extending from the 

 apex inwards ; the surface closely, finely punctate, with indications of a short median groove before the 

 base. Elytra about two and one-fourth times the length of the prothorax, subparallel in their basal half, 

 and rapidly narrowing thence to the apex,, the apices conjointly rounded ; deeply punctate-striate, the 

 interstices feebly convex throughout and somewhat thickly punctured. Beneath densely, finely, uniformly 

 punctate. Fourth tarsal joint strongly lamellate beneath. Fifth ventral segment with a very short 

 smooth line in the middle at the apex. 

 Length 10|, breadth 2| millira. 



Hob. Mexico, Cuernavaca (Salle). 



One specimen, probably a male. Closely allied to M. pruinosus, but differing from 

 it in the sharply bicarinate hind angles of the thorax, the partly infuscate antenna?, the 

 longer pubescence, and the more coarsely punctured elytral striae. Smaller and less 

 elongate than M.flavangulus, the elytra rounded at the apex, the fifth ventral segment 

 without distinct mucro. 



11. Monocrepidius albinus. 



Monocrepidius albinus, Cand. Monogr. Elat. ii. p. 246 \ 



Hah. Mexico (coll. Janson, ex Laferte), Vera Cruz (Salle 1 ). 



There are two specimens of this species in the Salle collection, and I have found a 

 single example ( <? ) of it mixed with the series of M. lividus in the Janson collection. 

 The antennae are short in both sexes. 



12. Monocrepidius athoides. 



J 1 . Monocrepidius athoides, Lee. New Sp. Col. p. 84 (1863) l . 



$ . Monocrepidius mutuus, Horn, Trans. Am. Ent. Soe. iii. p. 312 (1871) 2 . 



Hob. North America, Texas 1 , Arizona 2 . — Mexico (coll. Janson, ex Candeze), Puente 

 de Ixtla in Morelos, Mescala in Guerrero (H. H. Smith), Ventanas in Durango, Iguala 

 in Guerrero, Cuernavaca, Jalapa (Hoge), Vera Cruz (Salle), San Francisco in Vera Cruz 

 (Wickham), Yucatan (coll. Janson), Teinax in North Yucatan (Gaumer). 



