1853.] , 443 



tis, punctis postis siiLtilioribus, apice subtnincatis, spina minuta sulurali 

 armatis, femoribus muticis, antennis articulis 3 5 spina apicali minuta armatis. 

 Long. '56. 



Texas and Northern Mexico. Lieut. Haldeman and Dr. Berlandiere. This 

 species resembles in appearance E. villosum, but the glabrous line of the thorax 

 and the absence of the long apical spines of the elytra will at once distinguish it; 

 the spots of yellowish hair on the thorax are inclined to form four vittae. 



The scutellum in the species here described is densely pubescent, but as this 

 seems to be a character in all the species of the genus, I have not mentioned it 

 in the individual descriptions. 



Ophryastes Sch. 



A. Thorax lateribus tuberculato-dilatatis, postice subito valde angustatus. 



1. O. latirostris, niger, dense albido-squamosus, rostro crasso, basi im- 

 presso trisulcato, sulcis lateralibus divergentibus, obliquis, profundis, thorace 

 valde transverso, inaequali, grosse parce profundissime punctate, lateribus bitu-" 

 berosis, elytris thorace paulo latioribus, ovalibus, fusco subvuriegatis, striis pro- 

 fundis punctatis, interstitiis valJe convexis. Long. '5. 



One specimen found on the Arkansas River, near the mountains. This species 

 differs from all the following by the obliquity of the lateral grooves of the ros- 

 trum, which is also thicker than in the other species. 



2. O.ligatus, niger, dense sordide albo-squamcrsus, rostro basi impresso, 

 trisulcato, sulcis lateralibus brevibus obliquis profundis, thorace inaequali, latitu- 

 dine fere duplo breviore, lateribus dilatatis ad medium subangulatis, parce pro- 

 fundissime punctato, profunde canaliculato, elytris thorace paulo latioribus, 

 striis tenuibus vage punctatis, interstitiis paulo convexis, 2,4 et 6to irregulariter 

 fusco-nigris. Long. -38. 



One specimen, Nebraska. This species most resembles O. sulcirostris, but 

 the obliquity of the lateral grooves of the rostrum and the difference of the color 

 will distinguish it. The thorax is more deeply channelled, and is less constricted 

 posteriorly. 



3. O. s u 1 c ir o s t ri s , niger, dense albido-squamosus, fusco subvariegatus, 

 rostro basi impresso, trisulcato, sulcis lateralibus brevibus modice profundis, 

 thorace latitudine duplo breviore, canaliculato ina3quali, rugoso et grosse parce 

 profundissime punctato, lateribus valde dilatatis, postice subangulatis, elytris 

 thorace paulo latioribus tenuiter striatis striis grosse minus profunde punctatis, 

 interstitiis modice convexis. Long. '34. 



Schonherr, Cure. 1, 509 (1833 ;)^5, 819. 



Lipams sulcirostris Say, Journ. Acad. Nat. Sc. 3, 316. 



One specimen found on the Arkansas River, near the mountains. The thorax 

 is gradually dilated from the anterior constriction to the widest portion, while 

 in O. latirostris it is suddenly dilated behind the anterior constriction, and then 

 sinuate, so as to form two lateral prominences, of which the posterior one is 

 larger and less rounded. 



4. O. tuberosus, niger, albido-squamosus, rostro trisulcato, sulcis latera- 

 libus rectis profundis, thorace latitudine plus duplo breviore valde inasquali 

 grosse profunde punctato, lateribus bituberosis, elytris thorace non latioribus 

 striis vix impressis grosse profunde punctatis, interstitiis 2, 4 et 6to atris. 

 Long. '41. 



One specimen, Santa Fe, New Mexico, collected by Mr. Fendler. This spe- 

 cies differs from the three preceding, by the rostrum not being transversely im- 

 pressed at the base, and from the next by the lateral grooves of the rostrum 

 extending between the e);es, by the middle groove being less deep, and by the 

 lateral dilatations of the thorax being much more prominent, as well as by the 

 difference in the arrangement of the dark vittae of the elytra, and the deeper 

 punctures of the striae. The scales of the thorax have been removed, in great 

 part, so that I do not know if the color was variegated on that part of the body. 



5. 0. vittatus, niger, albido-squamosus, rostro trisulcato, sulco medio 



