168 DESCRIPTIONS OF AND OBSERVATIONS ON 



hairy: the joints of the antennae are in length about three times their 

 greatest breadth, even the second joint is in the same proportion with 

 respect to the third : the length of the antennae is equal to half that of 

 the body: clypeus subquadrate, concave towards the tip. — Length se- 

 ven-tenths of an inch. 



11. E. sulcicollis, Nob. (E. parallelus, Say, Ann. Lye. 'New York). 

 Dejean informs me that the name parallelus is preoccupied, and pro- 

 poses to substitute for it that w^hich I now give. An expressive name 

 would be inversicotlis, the thorax being as wide, or rather wider before 

 than behind. 



12. E. viridis, Nob., Ann. Lye. New York. Antennae short : joints 

 in their greatest breadth nearly equal to their length ; second joint 

 hardly half as long as the third : clypeus at tip not prominent, but only 

 distinguished by a line : thoracic spines with a carinate line parallel to 

 the exterior edge. 



13. E. aimpilis, Nob., Journ. Acad. Nat. Sc. I obtained another 

 specimen in the N. W. Territory. 



It is remarkable for the deep indentations of the clypeus. 



14. E. semzm7/a/MS, Nob., (Ibid.). In the only specimen at present 

 in my cabinet, is a transverse indented line in the middle of the late- 

 ral margin: the thoracic dorsal line is polished behind the middle. 



15. E. obesus, Nob. (Ibid.). The clypeus is not prominent, and 

 the thoracic spines are not carinated ; the elytra, in one specimen, are 

 acuminated at tip: the nails are very robust on the basal half, which 

 terminates at the middle in a prominent tooth, separated by a deep 

 fissure. 



16. E. viridanus, Nob. (Ann. Lye. Nat. Hist). The thorax has 

 two orbicular indentations before the middle. 



17. E. mancus, Nob. (Journ. A. N. S.). Second joint of the an- 

 tennae rather longer than the third. Clypeus not prominent. — Inhab. 

 New Hampshire, Harris.* 



[Among Mr Say's suppressed descriptions is the following, which may be of use in 

 determining the species, and is therefore worth preserving.] 



18. E. linteus. Black; elytra whitish, tip and sutural edge black.^Inhab. U. S. 



Body black : clypeus not prominent, rounded at tip : anlennse robust, deeply serrate ; se- 

 cond joint transverse, nearly orbicular, very small : thorax gradually narrowed before by a 



