Dec, 1845.] 317 



rounded ; medial impunctured frontal space well defined ; antennae and palpi 

 rufous, the former with the processes dusky; mandibles prominent, dull rufous 

 at base, with the apical half black : thorax dark dull rufous, densely granulate, 

 with tho lobe slightly carinate, each side of which feebly indented : elytra color 

 of the thorax : abdomen rufous: pectus black, varied with dull rufous; feet dull 

 rufous, with the basal half of the femora blackish. 

 Var. a. As in the preceding 1 , with the elytra black. 



4. R. fasciatus. Deep black; elytra rufous, maculate with black. 2£ 1. long. 

 Pennsylvania. 



Ripiphorus fasciatus, Melsh. Catal. 



Deep black : head with the vertex almost regularly rounded, punctured as is 

 common ; antenna: testaceous, with the processes dusky ; paipi dull testaceous; 

 eyes pale brown : thorax granulate, as is common, with the basal lobe feebly 

 carinate, in front of which slightly transversely indented : elytra rufous, with 

 the base, a large lateral spot near the middle and apex, black; the lateral spot is 

 sometimes confluent with the tip and suture : beneath black; feet dull rufous, 

 with the femora of the posterior ones piceous. 



5. R. ambiguus. Black; elytra testaceous, with the tip and basal edge black. 

 3 1. long. Pennsylvania. 



Ripiphorus bicolor, Say, Journ. Acad. Nat. Sci. iii, 275 1 

 Deep black: antenna; testaceous, with the processes dusky: palpi dull testa- 

 ceous : thorax granulate or punctured as is common, with the basal lobe slightly 

 carinate, each side of which indented : elytra pale testaceous, with the tip and 

 basal edge black : lateral edge dusky behind the middle : feet and beneath black. 

 Var. a. As the preceding, with the thorax very dark duli rufous. The name 

 bicolor, has been previously applied by Olivier to another species. 



6. R. longipes. Deep black ; elytra pale testaceous, with the base, a sub- 

 marginal spot and apex testaceous; feet long. 2| 1. long. Pennsylvania. 



Deep black : head with the vertex rather regularly rounded : antennae testa- 

 ceous, with the processes blackish : palpi piceous: thorax deep black, with the 

 lateral margins obscurely rufous ; basal lobe slightly carinate, and each side be- 

 fore the lobe obsoletely indented : elytra pale testaceous, with the base, an oblong 

 submarginal spot and tip, black : beneath deep black: feet comparatively long 

 and slender, dull rufous, with the femora black, piceous. Resembles much in 

 the general color and the elytra! marking of Var. a. of impressus, but the pre- 

 sent species is much smaller, and the thorax differently indented. 



7. R. tlioracicus. Deep black; thorax dull rufous. 2-£ I. long. Penn- 

 sylvania. 



Deep black: head shining, with the vertex obtusely rounded, blackish-rufous: 

 antennas black, with the basal joints testaceous : thorax dark dull rufous, with 

 the basal edge black ; basal lobe slightly carinate, acute : elytra, beneath and 

 feet deep black, terminal tarsal joints testaceous. 



Var. a. As the preceding, with tbe anterior third of the thorax blackish. 



8. R. niger. Black; tarsi dull testaceous. If 1. long. Pennsylvania. 

 Ripiphorus niger, Melsh. Catal 



Black, obscurely tinged with rufous: head with the vertex rather acutely 

 rounded : antennae blackish : palpi : thorax more strongly tinged with ru- 

 fous than the elytra : basal lobe slightly carinate : elytra, feet and beneath black: 



