74 
PROCEEDINGS OF THE ACADEMY OP 
et punctiilato, elytris subtiliter pubescentibus stibseriatim fortiter punctatis, 
humeris lineisque versus basin Isevibus, antice rufescentibus, postice baud 
punctatis oblique declivibus, margine tuberculisque utrinque tribus acutis 
elevatis, superiore minore, antennis pedibusque rufis. Long. 44 — 'IS. 
Colorado Desert. Abundant. 
Exops Curtis. 
E. e X e s u s , ater, capite confertissime granulato, tliorace latitudine baud 
breviore convexo, postice parum angustato, lateribus rectis, angulis omnibus 
rotundatis, granulato-punotato, modice canaliculato, elytris tliorace sesqui 
latioribus, cylindricis antice truncatis, fortiter cribratim postice confluenter 
punctatis et sensim granulatis, postice oblique declivibus et linea elevata arcu- 
ata notatis, antennis ferrugineis. Long. -47. 
Ringgold Barracks, Texas, ■ Mr. Haldeman. The posterior curved elevated 
line of the elytra becomes marginal near the apex, but anteriorly bends in- 
wards so as to define the oblique declivity. This curious species is the transi- 
tion form from Exops towards Apate and allied genera. 
Lyctus Fabr. 
L. planicollis, ater subtilius pubescens, tliorace latitudine paulo bre- 
viore, lateribus rectis serrulatis, angulis anticis rotundatis, postice subangusta- 
to, confertim punctato, dorso late canaliculato, elytris punctulatis et seriatim 
brevissime puberulis. Long. 17 — '25. 
Colorado River near the Gila. Differs from L. striatus by the broader, 
Hatter and less deeply excavated thorax, and by the much finer pubescence. 
Pelecyphorus Sol. 
P. morbillosus, ater opacus, thorace latitudine sublongiore, lateribus 
late rotundatis serratis, postice subangulato, angulis basi rectis, varioloso, 
versus latera late subdepresso et plicato, elytris thorace duplo latioribus ro- 
tundato-ovalibus, postice valde declivibus et subacutis, ad basin truncatis, 
liumeris dentiformibus, margine costisque utrinque duabus (interna tenuiore) 
elevatis plicis transversis irregularibus connexis, epipleuris sublsevibus. Long. 
•75. 
One specimen, Sonora, Mr. Schott. This species has nearly the form of P. 
carinatus, but diflfers much in its sculpture. 
Helops Fabr. 
H. f a r c t a , ovalis convexa, seneo-nigra nitida, capite thoraceque dense forti- 
ter punctatis, hoc ad latera aciculato, latitudine plus sesqui breviore, antror- 
sum parum angustato, et lateribus late rotundato, angulis anticis acutis, ad 
basin subsinuato, angulis posticis rectis, elytris thorace parum la,tioribus striis 
valde profunde exaratis, interstitiis convexis. Long. '25 — -33. 
New Braunfels, Texas ; Mr. Lindlieimer. The elytra of the female are 
broader and more inflated than those of the male, but in the latter the first 
three joints of the anterior and middle tarsi are dilated. 
Dacoderus Lec. 
Caput quadratum, postice in collo tenui coiistrictum ; mentum trapezoideum 
concavum, fissura buccalis nulla ; palpi brevissimi tenues ; (maxillje obtectse, 
invisse,) genae prominulse acutse, mandibulse parvse baud promiiiulse ; labrum 
minutissimum. Antennse remotse, in fovea profunda sub tuberculo laterali 
insertse, lO-articulatse crassse, articulis rotundatis iequalibus, 9no et lOmo paulo 
majoribus subtruncatis. Oculi in capitis latera postice siti, longitudinales 
ovales, prominuli. Thorax trapezoideus elongatus, medio transversim valde 
excavatus, tuberculo rotundato utrinque in lateribus munitus : elytra plana, 
elongata ovalia, ad basin emarginata, stria suturali profunda, epipleuris angus- 
tis. Pedes debiles, tarsi anteriores articulis 1 — 4 brevibus subsequalibus, 5to 
longiore, postici articulis 1 — 3 paulo elongatis sequalibus, 4to paulo longiore. 
[March, 
