June, 1907.] SCHAEFFER : NeW RhYNCHOPHORA. 79 



8. Pubescence of elytra uniformly gray, recumbent, without darker setae ; form elongate 



uniformis Champ. 

 Pubescence of elytra white, recumbent, with darker, erect setre intermixed. 



estriatus Casey. 



9. Elytral intervals two, four, six and eight moderately densely pubescent with grey 



hairs, the others naked and sparsely biseriately punctate, each puncture with a 



hair alternatus Horn. 



All the elytral intervals uniformly pubescent 10. 



10. Median line of thorax distinctly carinate from base two thirds to apex ; elytra 



clothed with greyish pubescence, the latter leaving some smooth spaces, inter- 

 vals with semi-erect black setae ; femora with a small tooth ; color dark bronze. 



carinicollis Horn. 



Median line of thorax not carinate ; a narrow smooth median line is present in 



basalis and faintly indicated in some specimens of scrobicollis, but is not 



elevated into a carina 11. 



11. Elytra without erect setse ; color ferruginous, apical half or more of elytra black, 



very sparsely clothed with very narrow, recumbent, white, scale like hairs ; 

 head between the eyes with an elongate fovea ; claws not toothed, but thick- 

 ened towards base dichrous Lee. 



Elytra with erect or semi-erect setje 12. 



12. Color of elytra uniformly black 13. 



Elytra black, basal third or more bright red, the rows of punctures coarse and 



deep, intervals sparsely punctate with recumbent white, scale-like hairs, inter- 

 mixed with sparser, erect, black setae ; femoral tooth small basalis n. sp, 



13. Elytra with recumbent, sparsely and very remotely placed narrow, scale-like, 



white hairs, intermixed with a very few longer, erect, black setae ; coarsely 

 punctate-striate, the first three striie somewhat deeply impressed, intervals sub- 

 convex and very sparsely and remotely punctate ; head and thorax very sparsely 

 punctate, almost smooth, the former between the eyes with a distinct, but not 



deeply impressed elongate fovea, femoral tooth small subglaber n. sp. 



Elytra with erect or partly semi-erect pale and dark pubescence 14. 



14. Femoral tooth large triangular 15. 



Femoral tooth small, narrow 20. 



15. Punctuation on the disk of thorax coarse and dense, the punctures separated by 



at most their own diameter ; black and white pubescence on head and thorax 

 abundant, long and erect, the white slightly shorter and suberect on the disk. 



arizonicus n. sp. 

 The punctures on thorax not densely placed, disk with some larger smooth spaces. 



16. 



16. Elytra with robust white, and finer longer, piceous setse 17. 



The white setae almost entirely absent from the disk, visible at sides and apex of 



elytra and scarcely more robust than the black setse 18. 



17. The while setae on elytra recurved, striae broadly, rather strongly impressed, 



coarsely, deeply, not very closely punctate egregius Casey. 



The white setse on elytra erect ; elytra with very feebly impressed series of rather 

 coarse, deep, somewhat distant punctures floridanus Casey. 



