NATURAL SCIENCES OF PHILADELPHIA. 185 
at base and fitting closely to the thorax, the rounded posterior angles of which 
are embraced by the prolonged humeri. 
VIII. 
E. seriata, nigra supra subopaca, capite modice thorace subtiliter puncta- 
tis, hoc quadrato, antice paulo angustato, latitudine paulo breviore, lateribus 
parum rotundatis, ad basin late rotundato, angulis anticis acutis, posticis ob- 
tusis et haud rotundatis, elytris convexis ovalibus (feminte thorace duplo, maris 
vix sesqui latioribus), postice valde declivibus obtuse acuminatis ad basin late 
emarginatis, humeris acutis, plus minusve fortiter striato-punctatis, interstitiis 
confuse subtiliter parce punctulatis. Long. -eS-'TV. 
Texas and the neighboring parts of Mexico. The anterior femora of the male 
are emarginate so as to form a right angle near the tip, those of the female are 
only sinuate, so that the angle becomes obtuse. 
E. deb ills, nigra nitida, capite sat profunde, thorace parce et subtiliter 
punctato, hx)c subquadrato, latitudine vix breviore, antice paulo angustato, 
lateribus late rotundatis, angulis anticis acutis, posticis obtusis, ad basin late 
rotundato, elytris ovalibus convexis (thorace maris sesqui latioribus) postice 
ralde declivibus haud acuminatis, ad basin late emarginatis, humeris acutis, 
sat fortiter striato-punctatis ; interstitiis uniseriatim subtiliter punctulatis. 
Long. -5. 
One specimen found in New Mexico by Mr. Fendler, and another in Sonorai 
by Dr. Webb. The anterior femora are not at all armed or sinuate ; the pros- 
ternum is mucronate behind as in the preceding, and the mesosternum is con- 
cave. The abdomen is shining, sparsely rugous, with a few small punctures. 
This species is of the size and shape of E, e x t r i c a t a, but the elytra in that 
are densely almost irregularly punctured. E. cognata Hald. has the elytra 
finely not densely, but almost irregularly punctured, and in both the prosternuni 
is less produced, and rather carinate than mucronate. 
IX. 
E. s 0 r 0 r , oblonga, nigra nitida, capite punctato, thorace subtiliter parce- 
punctulato, quadrato latitudine baud breviore, antice posticeque parum an- 
gustato, lateribus late rotundatis, angulis anticis acutis posticis obtusis, elytris 
ovalibus minus convexis, thorace (maris parum, feminse sesqui) latioribus, ad 
basin emarginatis, humeris acutis, postice valde declivibus obtuse acuminatis, 
fortius striato-punctatis, interstitiis parce punctatis. Long. -62 — -77. 
Texas, at Eagle Pass and San Antonio. Related to E. seriata in form and 
sculpture, but the thorax is more quadrate, and not more narrowed towards 
the apex than towards the base ; the elytra are more deeply emarginate at base, 
and transversely much less convex, and those of the female are much less di- 
lated ; the punctures are more regular and never have the appearance of fovese 
seen in E. seriata. The anterior femora are entirely unarmed, in both sexes. 
The prosternum is horizontally produced into a sharp point, th^e abdomen is 
sparsely but strongly rugous and punctured. 
E. striolata, nigra nitida, capite subtiliter parce punctato, thorace vix 
conspicue punctulato, quadrato latitudine haud breviore, utrinque perparum 
angustato, lateribus modice rotundatis, angulis anticis acutis, posticis obtusis, 
elytris ovalibus convexis (feminee) thorace duplo latioribus, ad basin perpa- 
rum emarginatis, humeris acutis, postice valde declivibus brevissime caudatis, 
punctis seriatis approximatis notatis, seriebus per paria approximatis, prope 
apicem obliteratis, interstitiis parce subtiliter punctulatis. Long. '75. 
Laredo to Ringgold Barracks ; Mr. Weise. Nearly of the same form as E, 
ventricosa, but much smaller and with much more numerous rows of 
punctures on the elytra ; the sides of the elytra extend farther upon the ab- 
domen, which is finely but more deeply rugous ; the anterior femora are en- 
tirely mutic ; the prosternum is horizontally produced and acute as in E. 
seriata. 
1858.] 14 
