South-American Coleoptera. 291 



episterna nearly as in that species, narrowed posteriorly. 

 Metasternum very closely and delicately punctured, finely 

 pilose. Abdomen not very thickly punctured. Legs shining, 

 sparingly punctured. 



Hab. Chiguinda. 



There is a little doubt to which genus this species should 

 be referred. Udeterus, Thorns., is founded on a male exam- 

 ple ; and the present species may be a female of an allied 

 species ; Thomson's figure, however, does not represent any 

 lobe at the base of the thorax — a character almost of generic 

 importance in this case. Themnesthes, Bates (Ent. Mo. Mag. 

 xii. p. 51), has the thorax of my species, agreeing in the 

 lateral spine and basal lobe ; but the metathoracic episterna do 

 not differ from those of Myzomorphus, and cannot certainly be 

 said to be " parallelogrammical " as in Tkemnesthes. The 

 second joint of the antennas is distinct in all three insects. 



Episacus, n. gen. 



General form of Calloctenus, but broader. Antennae of 

 m ale scarcely reaching beyond the apex of the elytra ; the 

 third to tenth joints with the anterior angle produced into a 

 moderately long acuminate process ; the eleventh joint very 

 long, very narrow at the base, and gradually becoming wider 

 to a little before the apexj where it is suddenly smaller, 

 giving the appearance of a twelfth joint. Thorax strongly 

 transverse, obliquely narrowed anteriorly; the posterior angles 

 acute, slightly prominent. Scutellum transverse, rounded 

 posteriorly. Elytra a little wider than the thorax, moderately 

 narrowed to the apex, which is obtuse, the outer angle 

 rounded, the sutural angle acute. Prosternal process conical, 

 scarcely produced beyond the coxa?, meeting a nearly similar 

 process of the mesosternum. Metasternum with a deep lon- 

 gitudinal impression. Episterna very broad, but narrower 

 posteriorly. The head, thorax, and body beneath with long 

 pile. 



The form of the sterna and the transverse scutellum at 

 once separate this from Calloctenus. 



Episacus jrilosicollis, n. sp. 



Olivaceo-ooneus ; capite thoraeequc fulvo-pilosis ; clytris nigris, 

 purpurascentibus, denso fortitcr punctatis, postice velutinis, lincis 

 nonnullis elevatis nitidis. 



Long. 8-| lin. 



Thorax twice as broad as long, obliquely narrowed from 

 the posterior angles to the front, impressed on the disk, rather 



