420 SEEEICOENIA. 



3. Aptopus longipennis. 



Elongate, rather narrow, somewhat sparsely clothed with long yellowish- cinereous pubescence ; brown, the 

 head and prothorax a little darker in colour than the elytra ; beneath piceous : the antennas piceous, with 

 the first joint and the base of each of the others ferruginous ; the legs fusco-ferruginous. Head rather 

 sparsely, unequally punctate ; antenna? slender, extending to about the basal fourth of the elytra. 

 Prothorax broader than long, a little wider at the base than at the apex, rounded at the sides, the latter 

 feebly sinuate behind ; the hind angles rather short ; the surface somewhat sparsely, unequally punctate, 

 the punctuation becoming a little closer towards the sides, the intermixed finer punctures less numerous 

 than the larger ones on the middle of the disc ; the base with a short deep sulcus on either side. Elytra 

 three and one-half times the length of the prothorax, and much wider than it, subparallel to the middle 

 and gradually narrowing thence to the apex ; finely punctate-striate, the interstices feebly convex, flatter 

 on the disc, and sparsely punctate. Beneath closely and finely punctured, the metasternum with con- 

 spicuous intermixed coarser punctures. 



Length 9£, breadth 2| millim. ( § .) 



Ilab. Guatemala, Totonicapam 10,000 feet (Champion). 



One specimen. This species resembles A. pruinosus and its allies, but differs from 

 all of them in its relatively very elongate elytra and rather narrow shape. The mixed 

 punctuation of the thorax and metasternum and the non-divergent thoracic hind angles 

 distinguish it from A. campylinus. 



4. Aptopus longicollis. 



Elongate, shining, somewhat sparsely clothed with long yellowish-cinereous pubescence ; piceous-brown, or 

 obscure castaneous with the sides or the sutural region of the elytra broadly darker; the antennae and legs 

 ferrugineo-testaceous, the antennas sometimes darker. Head thickly punctured ; antennas slender, half the 

 length of the body in the male, a little shorter in the female. Prothorax nearly or quite as long as broad 

 in the male, shorter in the female, moderately rounded at the sides, narrowing a little in front and behind, 

 the sides feebly sinuate before the base; the hind angles moderately produced; the surface sparsely, 

 finely punctate, with intermixed slightly finer punctures ; the base with a short deep sulcus on either 

 side. Elytra elongate, much wider than the prothorax, subparallel to the middle and narrowing thence 

 to the apex, the humeri rounded ; deeply punctate-striate, the striae rather coarsely punctured, the 

 interstices convex and sparsely punctate. Beneath densely, very finely punctate, with scattered coarser 

 punctures intermixed. 



Length lO^-llf, breadth 3-3| millim. (<?$.) 



Hah. Mexico, Amula in Guerrero (H. H. Smith), Jalapa (Edge), Panistlahuaca and 

 Juquila in Oaxaca (Salle). 



This insect is very closely allied to A. pruinosus ; but when males of each from the 

 same localities are compared it is evident that the thorax in A. longicollis is more 

 elongate (considerably broader than long in the male of A. pruinosus) and more 

 sparsely punctate ; the el ytral interstices are also less thickly punctured. The females, 

 however, are scarcely separable. 



5. Aptopus rufomarginatus. (Tab. XIX. fig. 6.) 



Elongate, broad, robust, flattened above, shining, somewhat thickly clothed with yellowish-cinereous 

 pubescence ; black, the elytra with the sides from immediately below the humeri to the apex broadly 

 ruf'ous ; the antennas and legs piceous, the tarsi obscure ferruginous. Head rather sparsely punctate ; 



