NORTH OF MEXICO. 257 



Front uni or trilobed. 



Body apterous ; metasternum short. gnathosiini. 



Body winged; metasternum long. 



Anterior tibiae slender, with two spurs. efitragini. 



Anterior tibia? with the outer apical angle prolonged 



and with a single spur. cnemodini. 



Front broadly rounded. thinobatini. 



Mentum large, concealing either ligula or maxillse, never both ; 



Tibial spurs distinct. batuliini. 



Tibial spurs very minute. 



Anterior coxa' widely separated. 



Eyes transverse, finely granulated. zopherini. 



Eyes rounded, coarsely granulated. tjsechini. 



Anterior cox;c narrowly separated; 



antenna? 11-jointed. stenosiini. 



Anterior coxa? continguous ; 



antenna? 10-jointed. dacoderini. 



TRIBE I — EPIPHYSINI. 



Body short, convex, apterous; epistoma trilobed, labrura prominent; mentum very 

 large, entirely filling the gular cavity; ligula and maxillae concealed; thorax very short, 

 anterior angles prominent, acute; elytra globose, sides embracing widely the flanks, epi- 

 pleurae narrowing; coxa? widely separated, the posterior transverse; presternum closely 

 fitting to the mesosternum. Tarsi slender, sparsely ciliate with long hairs. 



Tins tribe contains in our fauna but one genus. 



EDROTES, Lee. 

 Edrotes, Lee, Ann. Lye. V, 141. 

 E. rotundus, Say, (Pimelia) Joum. Acad., 3,251; Lee. (Edrotes) Ann. Lye. V, 141. Lac. Genera, PL 4S, fig. 2. 



Sub-opaque, coarsely but sparsely punctured and sparsely clothed with reddish hairs. 

 Length .25-30 inch. 



Occurs rather abundantly on the Plains of Kansas and Nebraska. 



E. ventrieosus, Lee., Ann. Lye. V, 141; Lac. Genera, PI. 48. tig. 3; Thomson, Arcana Naturae, Vol. I, PI. 

 XII, fig. 8. 



Shining, more finely and sparsely punctured and sparsely clothed with greyish hair. 

 Length .41 inch. 



Occurs in the Desert region of California east of the Sierra Nevada, and in similar re- 

 gions of Arizona and Nevada. 



AMERI. PHILOSO. SOC. — VOL. XIV. — 65 



