APTOPUS. 425 



Hab. Mexico, Amula 6000 feet and Omilteme 8000 feet, both in Guerrero 

 (E. E. Smith). 



A male from Amula and a female from Omilteme. Allied to A. uniformis, but 

 differing therefrom in having the thorax more narrowed behind (the base and apex 

 being about equal in width), very minutely punctured, and with the basal sulci reduced 

 to a short incision on either side. The female, which is broader and more robust than 

 the male, differs from the same sex of A. uniformis in having more oval elytra. 



12. Aptopus fuscipes. 



Moderately elongate, shining, cinereo-pubescent, piceous, the antennae and legs fuscous. Head closely, finely 

 punctate : antennae slender, extending to a little below the humeri. Prothorax slightly broader than 

 long, a little wider at the base than at the apex, rounded at the sides, the latter feebly sinuate before the 

 base : the hind angles short ; the surface closely, finely punctate, the punctuation becoming slightly 

 finer towards the base ; the base with a long, deep sulcus on either side. Elytra moderately long, much 

 wider than the prothorax, subparallel to the middle and narrowing thence to the apex ; very deeply 

 punctate-striate, the interstices strongly convex throughout and sparsely punctured. Beneath closely, 

 finely punctate, without intermixed coarser punctures. 



Length 7|, breadth 2| millim. 



Eab. Nicaeagua, Chontales (Belt). 



One specimen, in mutilated condition, resulting from the corrosion of the pin. This 

 insect closely resembles the Mexican A. lateralis, var. concolor, but is easily separable 

 from it by the uniform punctuation of the head, thorax, and under surface, there being 

 no trace of intermixed larger punctures. The punctuation of the thorax is distinctly 

 sparser and coarser than in A. uniformis. The specimen described is the only repre- 

 sentative of the genus we have received from Nicaragua. 



13. Aptopus omiltemanus. 



Elongate, moderately shining, rather sparsely clothed with long, fine, fulvo-cinereous pubescence ; brown or 

 reddish-brown above, darker beneath, the antennae and legs testaceous or ferrugiueo-testaceous. Head 

 closely, finely punctate ; antennae slender, half the length of the body in the male, shorter in the female. 

 Prothorax slightly broader than long, broader and more convex in the female than in the male, a little 

 wider at the base than at the apex, feebly rounded at the sides, the latter slightly sinuate before the base ; 

 the hind angles a little divergent; the surface closely, finely, uniformly punctate; the base with a short 

 sulcus on either side. Elytra elongate, in the male about one-half, and in the female considerably, wider 

 than the prothorax, flattened on the disc, subparallel to the middle and narrowing thence to the apex ; 

 deeply striate, the striae rather finely punctured, the interstices convex, flatter towards the suture, and 

 sparsely, finely punctate. Beneath densely, finely punctate, with widely scattered intermixed slightly 

 coarser punctures on the metasternum and on the middle of the ventral segments. 



Length 8§-ll, breadth 2|-3| millim. ( S 2 •) 



Eab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 



Two males and one female. In this species the thorax in the male is very narrow 

 compared with the elytra, the latter being elongate and flattened. The female closely 

 resembles the male of A. erichsoni, but may be known from it by its narrower and 



biol. centk.-amek., Coleopt., Vol. III. Pt. 1, December 1895. 3 I 



