124 
ARC A N A N A TU R Æ. 
at the junction of the Colorado and Gila rivers, California, under bark of a species of Populus; ver y 
rare. 
ïhis genus is placed by Lacordaire near the Adelostomites, forming a distinct tribe. It is, in fact, 
a very abnormal form and differs from ail the other généra of Tenebrionidœ as at présent limited, with 
one exception, by the anterior cotyloid cavities being confluent. The exception is the genus Cono- 
notus, Lee., which is allied to Apocrypha, Esch. 
ARÆOSCHIZUS, Lee. 
7. A. costipennis, rufo-picea, opaca, brevissime flavo-setosa, thorace, capite angustiore elongato, sub- 
quadrato ; elytris ellipticis thorace duplo latioribus, foveis seriatis cancellatis, interstitiis 2,4,6 
marginalique magis elevatis ; antennis crassis perfoliatis . — Long. 4 mill. — Tab. XIII, fig. 11. 
At the western edge of the Colorado Desert of California, near Vallecitas, under stones. This genus 
is closely allied to Stenosis, Herbst. (Tagenia, Latr.j, but differs by the eleventh joint of the antennæ 
being smaller and closely applied to the tenth, by the from of the mentum and by the very narrow 
eyes on the superior surface of the head. 
CERENOPUS, Lee. 
8. C. CONCOLOK, ater nitidus, capite marginibus reflexis, transversim mpresso, vertice subelevato; 
thorace latitudine longiore, ovato, postice paulo angustato, ad latera parce subtiliter punctato, ante 
basin vagefoveato; elytris pone medium paulo latioribus, foveis seriebus 8 marginalique digestis; tibiis 
ahticis processu externo apicali brevi rotundato. — Long. 19-22 mill. — Tab. XII, fig. 3. 
Leconte, Annals of the Lyceum ofNatural Uistory of New York, V, 143. Colorado Desert of California ; 
rare. Cape San Lucas, Lower California, abundant. The males of this genus hâve the anterior thighs 
much thickened, the anterior tibiæ curved and denticulate internally, and the posterior thighs 
toothed; in this species, the anterior tibiæ are besides deeply sulcate externally, and the posterior 
thighs irregularly serrate beneath. 
The genus is confined to Southern California and Arizona, from which one species Ç. bicolor extends 
into upper Texas. It is placed by Lacordaire in the tribe Scaurides, near Centrioptera, Mann., from 
which it differs by many characters, but more particularly by the small size of the mentum. 
ELEODES, Esch. 
9. E. texan, v, oblonga, nigro-picea, parum nitida, capite punctato; thorace subtiliter parce punctulato, 
transverso, capite quadruplo latiore, supra parum convexo, lateribus late depressis et paulo reflexis, 
subrugosis , maxime rotundatis postice subsinuatis, ad basin truncato, angulis posticis redis, anticis 
acutis acuminatis ; elytris thorace angustioribus, parallelis marginatis, dorso planis postice declivibus 
(maris breviter acuminato-productis , feminæ subacutis), sulcatis, sulcis punctatis, interstitiis parce 
punctatis. — Long. 41 mill. — Tab. XII, fig. 5 d 1 . 
Leconte, Proceedings of the Academy of Natural Sciences of Philadelphia, 1858, p. 182. Texas ; this 
belongs to group II, of my arrangement of the species of Eleodes of the United States (loc. cit.). It is 
allied to E. suturalis, Lee. {Blaps suturalis, Sayj, but is much larger and comparatively narrower, 
with the sides of the thorax and elytra still more strongly margined. The spurs of the anterior tibiæ 
are equal slender and acute in both sexes; the anterior thighs are armed with an acute tooth in the 
male and an obtuse one in the female 
The genus Eleodes now embraces a large number of species of very varied form. Some of these 
