162 Mr. H. W. Bates on the Endomychidae of the Amazon Yallc)/. 



acutis, fere opaco, sericeo-nitente ; elytris violaceo-nigris, nitidis, for- 

 titer subrugoso-pimctatis. — Long. lin. 5 ( $ ). 



Pitchy, scarcely shining. Head opake. Antenna} stout, third joint 

 about as long as the fourth and fifth united, the two latter of equal 

 length, the sixth, seventh, and eighth joints much shorter and uniform 

 in length j basal joint pitchy-red, the club black, opake, the rest shining 

 black. Thorax much narrower and more elongate than is usual in this 

 genus, fore-angles rather produced and acute, the sides from the base 

 narrowed to one-third the length, then gradually dilated to near the 

 apex, whence they are again narrowed to the apex, the side furrows 

 not reaching to the middle, the longitudinal line faintly impressed, not 

 perceptibly punctured, pitchy with a slight silken gloss. Scutellum 

 shining, with a large opake fovea in the middle. Elytra nearly covered 

 with large and deep punctures, many of them connected by ruga;, inter- 

 stices convex in some places, smooth and shining, globose-convex, of 

 equal breadth from the shoulders to two-thirds their length, then 

 gradually narrowed to the apex, the external flattened margins very 

 narrow; pitchy, with a violet tinge. Body beneath reddish-pitchy, 

 including the under margins of the elytra, which arc coarsely punc- 

 tured. Legs pitchy-red, base of the hind femora and all the tibia) 

 black. 



I have one example only of this large and distinct species, which 

 was taken at Fonte Boa, on the Upper Amazons. 



2. Corynomalus rugosus, n. sp. 



C. subglobosus, piceus vix nitidus, antennis, articulis duobus basalibus 

 exceptis, tibiisque nigris ; thorace angusto, fere opaco, sericeo-nitente ; 

 elytris aaneis nitidis fortissime rugoso-punctatis. — Long. lin. 3^ ( $ ). 



Head pitchy-red, very finely punctured, slightly shining. Antennas 

 with the joints short and stout, their relative lengths the same as in 

 the preceding species; the basal joint red, the second pitchy ; the club 

 opake, the rest shining black. Thorax similar in shape to that of the 

 preceding, but considerably shorter in comparison to its breadth, yet 

 notably longer than the other species of the genus, reddish-pitch}', 

 darker in the middle, very obscurely punctured, shining with a very 

 slight silky gloss. Scutellum with a very large central fovea. Elytra 

 short, compact, of equal breadth from the shoulders to two-thirds their 

 length, then suddenly narrowed to the apex ; covered nearly throughout 

 with large and deep punctures, connected in groups by irregular rugffl, 

 the interstices convex; brilliant dark brassy, the external margins 

 moderate in breadth and ferruginous towards the apex. Breast piceous, 

 scarcely shining, abdomen rusty-red, shining, the margins of the elytra 

 piceous-brassy and coarsely rugose punctate. Femora and tarsi bright- 

 red, tibiae black. 

 I have only one example of this handsome species, which I took 



at St. Paulo, on the Amazon, near the Peruvian frontier. 



