30 THOS. L. CASEY. 



If the structure of the abdomen were not noted, it would be almost 

 impossible to distinguish the genus from some of those of the Pse- 

 laphida3. 



Our tliree species may be distinguished as follows : — 



Basal thoracic foveae four in number llitidllS. 



Basal thoracic foveae six in number. 



Prothorax having at the base a very distinct medial carina ; body rather 

 strongly pubescent cariliatllS. 



Prothorax having no appearance of the medial carina ; puliescencc very 

 sparse; color pale luculentus. 



I have seen no specimen of the first species, and the characters 

 employed rest entirely on the authority of Dr. LeConte. 



E. carinatlis n. sp. — Form slender. Pubescence moderately close, 

 distinct, sub-recumbent, evenly distributed. Head small, slightly wider 

 than long ; interocular surface with two irregular and well-marked impres- 

 sions, jwrrected between the antennae, forming a transverse rounded eleva- 

 tion, under which the antennae are inserted ; labrum broadly and feebly 

 angulate anteriorly; antennae slightly shorter than the head and prothorax 

 together, first two joints equal and robust, next three much narrower, slightly 

 longer than wide, sub-equal, joints six to eight shorter, sub-globular, seventh 

 transversely oval, ninth shorter than the eighth, strongly transverse, tenth 

 abruptly more than twice as wide as the ninth, strongly transverse, eleventh 

 slightly wider than the tenth, longer than wide, having a distinct terminal 

 process ; maxillary palpi rather slender, third joint as long as the first two 

 together, fourth not visible ; mentum small, trapezoidal, surface Hat. Pro- 

 thorax much broader than the head, one-third wider than long ; sides for 

 two-thirds the length from the apex parallel and strongly arcuate, then 

 abruptly convergent behind and sinuate ; anterior angles rounded, posterior 

 acute ; apex much longer than the base, equally and feebly arcuate ; disk 

 impunctate, highly polished, strongly convex ; near each basal angle, and 

 in the middle at the base there is a very acute, short longitudinal carina 

 attaining the basal margin ; between each pair of carinae there are three 

 transversely disposed deep equidistant foveae. Elytra at base as wide as 

 the prothorax ; sides rather rapidly divergent posteriorly, slightly longer 

 than the width at base and feeblj- arcuate ; together broadly and very feebly 

 emarginate behind ; suture one-third longer than the pronotum ; disk con- 

 vex, very feebly and distantly punctulate ; sutural striae distinct Scutellum 

 excessively small. Abdominal segments as wide as the elytra, very strongly 

 margined, border al)ruptly much narrower, nearly obsolete, on the fifth 

 segment ; surface very convex, highly polished. Legs moderate; first three 

 joints of posterior tarsi decreasing in length, last much longer. Color 

 throughout the body dark red<lish -testaceous, legs paler ; integuments trans- 

 lucent. 



Mtilt. — Sixth ventral segment very strongly emarginate at apex, emargi- 

 nation nearly evenly rounde<l, nearly as wide as the entire segment, and 

 alx)Ut two-thirds wiiler than deep ; seventh segment truncate at tii>. 



