1853.] 443 
\ 
tis, punctis postis subtilioribus, apice subtruncatis, spina minuta suturali 
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 vitte. 
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. 
Opuryastes 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, inequali, grosse parce profundissime punctato, lateribus bitu- 
berosis, elytris thorace paulo latioribus, ovalibus, fusco subvariegatis, striis pro- 
fundis punctatis, interstitiis valde 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-squamosus, rostro basi impresso, 
trisuleato, sulcis lateralibus brevibus obliquis profundis, thorace inequali, 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.sulcirostris, niger, dense albido-squamosus, fusco subvariegatus, 
rostro basi impresso, trisulcato, sulcis lateralibus brevibus modice profundis, 
thorace latitudine duplo breviore, canaliculato inwquali, 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. 
Liparus sulevrostris 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 inequali 
grosse profunde punctato, lateribus bituberosis, elytris thorace non latioribus 
ee vix impressis grosse profunde punctatis, interstitiis 2, 4 et 6to atris. 
ong. :41. 
One specimen, Santa Fé, 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 eyes, 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 vitte of the elytra. and the deeper 
punctures of the strie. 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. O. vittatus, niger, albido-squamosus, rostro trisulcato, suleco medio 
