WORTB OF MEXII 0. : 3 1 1 



species is unnecessary, while from the following il maj be distinguished by having ver\ 

 much more prominent femoral spurs and by the form of the elytra alreadj mentioned. 



curs abundantly on the Colorado Desert (Leconte); those in my cabinet are from 

 central Arizona, where it exceeds all other insects in abundance except E. hispilabris, 

 S iy,(sulcata, Lee.) Length .58-1.30 inch. The greater number arc over one inch in length. 



E. femorata, Lee, Ann. Lye. 5, Kit. 



Tin- teeth of the femora arc all very obtuse. 

 i >ccurs at San Diego, ( lalifornia. 

 Length .68-1.00 inch. 



The species of the section hereafter noted differ from tin- three preceding, in having 



only the anterior femur (if any) toothed. 



In accordance with the form of thorax tin- species max he again sub-divided, those 

 with a sub-quadrate thorax with very feebly rounded sides, and with the base rarely nar- 

 rower w ill he mentioned first. 



E. longicollis, Lee., Ann. Lye. ~>. 134. Lee., Proc. Acad. 1858, p. L86. 



Frequently elongated fusiform in shape, thorax generally longer than broad, sides 



ily rounded, base always broader than apex. Femora mutic in both sexes. The elytra 

 arc smooth or feehly punctured, never striate. 



curs abundantly in New Mexico and Arizona, and occasionally in Kansas and 

 Colorado. 



Length .90-1.25 inch. 



K gentilis, Lee., Proc. A.cad. 1858, p. l s 7. 



The femora are mutic as in longicollis, from which it differs in it- -mailer size, more 

 quadrate thorax with more rounded sides and rather more prominent anterior angles. 

 i I curs at San 1 >iego, ( 'al. 

 Length .75 inch. 



E. ventricosa, Lee., Pro Lead. 1858, p. 168. 



With this species commences a series with the anterior femora of the i (and fre- 

 quently 5 ) armed with an acute tooth or sinuate. The elytra are also feehly sulcate and 

 rows of rather coarse punctures. In this the elytra are strongly ventricose in both sexes, 

 and also caudate in the male. The anterior femora of the male are armed with a robust 



h. strongly curved. The thorax i- broader than long, with sides and base moderately 

 rounded, anferiorh feebly emarginate, angles distinct, not dentiform. 



Occurs in Ti xas, mar the Rio Grande. 



Length 1.05-1.40 inch. 



