168 Mr. H.W. Bates on the Endomychidoe of the Amazon Valley. 



dilated from a little before the middle, fore-angles obtuse, the hinder 

 right-angled, not perceptibly punctate ; rufous shining, with a silky 

 gloss. Elytra shaped like those of C. discoideus, surface coriaceous, 

 evenly and moderately punctured, scarcely shining; each with two 

 largo blue-black patches, one larger on the basal part of the disk, one 

 smaller on the apical part, leaving a rufous margin of about equal 

 breadth all around them. The under surface of the body and legs 

 rufous. 



I have only one example of the present species, which was taken 

 at Serpa, on the Guiana side of the Lower Amazon. I was at first 

 inclined to refer it to the C. quadrimaculatus of Gerstaecker ; but the 

 nature of the thoracic surface, the colour of the antennae, and the 

 shape of the spots of the elytra, as described by that author, seem 

 to show that we have here to deal with a different species. 



12. Corynomalus angulicollis, n. sp. 



C. rufo-ferrugineus, antennarum articulis interdum nonnullis ante clavam 

 fuscis, ipsa clava nigra ; prothorace apud medium angulariter ampliato, 

 angulis omnibus acutis, opaco ; elytris subnitidis vel fere opacis, in 

 femina postice subampliatis, punctatis, nigro-cyaneis apicibus runs, vel 

 rufo-ferrugineis plagis magma cyaneo-fuscis. — Long. lin. 3| ( tf $ ). 



Rusty-red. Antenna? with the third joint as long as the two follow- 

 ing united, a variable number of joiuts preceding the club fuscous, some- 

 times the extreme tips of the seventh and eighth joints alone dusky. 

 Prothorax from the base slightly narrowed to one-third the length, 

 then abruptly widened to two-thirds the length, afterwards slightly 

 narrowed to the tip, the dilatation forming an obtuse angle ; fore angles 

 prominent, hind angles produced and acute, the usual grooves strongly 

 marked, the whole surface opake. Elytra in the male cordate, very 

 slightly narrowed from behind the shoulders to after the middle, in the 

 female oval, gradually widened from the shoulders to about the middle, 

 then rounded and more slowly narrowed to the apex, the shoulders 

 with a long and narrow callus bordered on the inner side by an oblong 

 deep fovea, the whole surface rather closely covered with moderate- 

 sized punctures and slightly shining ; they present the following di- 

 versities of coloration : — 



1. Rusty-red unicolorous. 



2. Rusty-red, with an obscure greenish-fuscous stripe along the 

 disk near the suture, interrupted in the middle. 



3. Rusty-red, each with two large subtriangular greenish-fuscous 

 patches on the disk, one occupying the basal half, the other the 

 apical, leaving around them a rusty red border of equal breadth. 



4. Dark-blue or greenish-black ; apex, the extreme margin from 

 the apex to about the middle, the basal margin and humeral callus 

 narrowly pale ferruginous. 



