6 n. n. noR.v, m. d. 



notch. Tlic tiilierclos of the elytra are moderately elevated, smooth 

 and shii)iii<.' and those of the secondary series are iie;irly as couspicu- 

 ous as those of the primary. 



As in aiihrrnsKn the sub-apical umbone is reduce<l to a minimum. 



Tlie leuj^th varies fron) .4S — .(i(> inch; I'l — 17 mm. 



Occurs in the southern Atlantic and Gulf States, Kansas, New 

 Mexico, Arizona, Peninsula California, California and Mexico. 



Group II. 

 The species of this uroup are all smaller than tho, c of the preced- 

 ini:-, and some of them are even below the medium size. The varia- 

 tions of the thoracic sculpture will be noted in the remarks on the 

 several species. 



The tip of the prosternnm behind the coxre varies in form, and has 

 been made use of by Ilandd with success in his synoptic table. The 

 tip may be spiniform. sub-cariniforra or entirely flat. The hind 

 femora may have their upper posterior margin either spinulose or sim- 

 ple, and in accordance with the presence or absence of these char- 

 acters the main subdivisions of the table are forn)ed. 



Prostenium at tip spiniform ; hind femora spinulose 14. 



Prosternum not si>iiiiforin, soinetimes subcariniform or slightly promi- 

 nent !• 



1. Hind femora spinulose along the posterior margin 3. 



Hind femora not spinulose •$, 



2. Thorax with median sulcus limited on each side by an obtuse ridge 4. 



Thorax not sulcate ; elytra not tuberculate 15. 



4. Elylral tubercles with erect setjie; median sulcus usually entire. 



iiiberciiIaluK. 

 Elytral tubercles squammulato-pilose ; median sulcus usually inter- 

 rupted *•• 



5. Elytral margin strongly serrulate; tubercles cristiform, those of the second 



and third rows continuous at basal half. geininulatus. 



Elylral margin feebly serrulate ; tubercles feebly elevated, usually nenrly 

 flat at the i)osterior declivity Soiiora?. 



3. Elytral tubercles with black setfe O. 



Elytral tubercles with rufous or pale hairs or scales T. 



6. Tubercles elevated, setae erect, moderately long oriiiafOUH. 



Tubercles scarcely evident, sette very short oapillsiris. 



7. Elytra with rows of tubercles or with patches of scales or sette rei>lacing 



them S. 



Elytra without tubercles, surface with coarsely punctured strise 16. 



ri. Elytra distinctly tuberculate; thorax with well marked ridges 9. 



Elytra not tuberculate, the tubercles replaced by patches of setae 10. 



9. Thorax sulcate at middle, the median ridges straight 11. 



Thorax biloveale, the ridges very sinuous 18. 



11. Elylral margin at base entire UiiistriatllN. 



