64 OnnEii—COLEOPTERA. S e c t i o n — R E N T A M E R A ,
SYN.: Oi-emastodieUus nitens. Lceonte, Proc. Acad. Philad. yol. vi. 1853, p. 232.
' Body black, shining, with fi few short ycHow bristles. Head convex, grossly confluently punctured, with
a small tubercle on each side above the base of the antenn® ; mentum excavated, the posterior margin of the
excavation ciliated, acutely produced at its middle. Thorax one-half wider than long, gradually narrowed
in front, suddenly constricted at the base; the apex with a deep imprcs.sion near the anterior angles, which are
tuberculiform; the bases deeply depressed; the posterior margin truncated; the posterior angles obtuse, tuberculiform,
little prominent; surface sparsely punctured, more thickly towards the sides. Elytra slightly impressed
near the scutellum with deep conllnent punctures; humeri and scapuUe smooth.
' This species is readily distinguished by its lustre, by the deep depression at the basis of the thorax, and
the scattered punctures of its disc/ &c.
SPECIES 14 (100)—CKEMASTOCHEILUS SAUCIITS.
Eufo-castaneus, nitidus; thorace transverso, angulis anticis anriculatis, posticis incisis et retrorsum aeuminato
productis; disco ad angnlos antieos breviter, intra posticos longe exarato, parte mediana aBqualiter snbtilius
pimetata, lateralibus incrassatis, eonvexis L-evibns, extrorsnm punctatis; elytris pnnetis elongatis sat densis
insenlptis ; pygidio punctato subcarinato ; mento parum eoncavo, margine postico subangulato, haud inciso.
Long. coip). lin. 5.
Habitat; Pole Creek, Nebraska (Mr. W. Wood), Llano Estacado (Captain Pope).
SYI;.: Cremastocheihis saiicius. _ Lecoute, Journ. Acad. Nat. Sc. Philad. vol. iv. and Series, 1858, p. 16.
Readily known by the remarkable foi-m of the thorax, the surface of which is divided into three lobes by
the meeting of the long posterior and the short anterior excavations, which commence immediately at the
respective aiigles. It belongs, with the other Western species, to the division with the mentum entii-e.
SPECIES 15 (lOl)-CBEMASTOCHEILUS KNOCHII.
PLATE XIV, FIG. 6.
Ater opacus; fronte transversim earinata, thoracis lateribus rotundatis, angulis acutis ; elytrorum disco
subseriatim punctato; mento basi integro prominulo.
Long. corp. lin. 5 - 5 i ; lat. elytr. lin. 2.
Habitat; Missouri, near Long's Peak (Leconte); Colorado (D. Parry); Illinois (llus. Berol. No. 41,582).
SYN. : Gretnastocheilus Knochii. Leconte, Proc. Acad. Philad. vi. 1853, p. 231.
This species is small, narrow, black, glossy, and subconvex. The head is thickly and finely punctured ; the
anterior margin strongly reflexed and roimded, aud separated from the crown by a sharp, elevated, curved carina;
the angles in front of the eyes small but prominent, and the disc marked in front of each eye with an impression.
The mentum is moderately excavated, entire, and slightly produced in the middle of the posterior margin.
The prothorax is transverse, convex, covered irregularly with large and deep round punctures, the centre having
a lono-itudinal impression; the anterior angles are prominent, directed inwardly towards the eyes, but not
elevated into tubercles; the sides of the prothorax are gradually rounded from the apex of the anterior angles
nearly to the hinder ones, where they are formed into an acute triangular point, directed outwards; the hind
margin of the prothorax is truncate, deeply impressed on each side near the posterior angles, which are acute
and prominent; the surface moderately convex, with a slightly longitudinal furrow in the middle, grossly
and sparsely punctured. The elytra are narrow and moderately convex, slightly depressed down the middle
of each. The disc is moderately covered with a few transverse ruga3, with rather large, oval, cicatricose,
shallow punctures, almost disposed in lines on the disc, and which become fewer and more rounded towards
the apex. The teeth of the fore tibiíE are less strongly prominent than in the majority of the species. The
pygidium is sparsely punctate. Closely allied to Cr. Mexicatms Schaum, but smaller, with the thorax more
rounded on the sides, and consequently broader at the apex and less constricted at the base.
F a m i l y — C E T O N I I D I E , SUB-Family—CREMASTOCIIEILIDES. C5
SPECIES 16 (102)—CKEMASTOCHEILUS SCHAUMIL
PLATE XIV, Fio. 3.
Lecontc.
Ater, opacus, breviter setosus; thorace confertim punctato, lateribus rotundato, angulis anticis foveatis,
posticis acutis, subelevatis; elytris punctis eUipticis minus profundis ; mento modice concavo postice subacuto ;
pedibus brevibus ; tarsis brevissimis ; pygidio punctis rotundis notato.
Long. corp. lin. 7^.
Habitat; San Diego et Santa Isabel, California. In Mus. Reg. Berol. (Col. Schaum, No. 41,583).
SYN. : CremastocheiUs Sdiaumii. Lecoute, Proc. Acad. Philad. vi. 1853, p. 231.
This is a large, robust species ; the mentum is entire, saucer-shaped, round in front, and obtusely pointed
iu the middle of'tlie hind margin (fig. 3 a). The front margin of the head is rounded, elevated, smooth, aud
glossy; the disc of the head scabrous; the prothorax has the sides very much rounded, it is one-half wider
Sian'long, the widest part being behind the middle; the disc with a very slight abbreviated central furrow,
the punctm-es close and fine, emitting short setaj; the anterior angles foveated internally, the postermr angles
acute, scarcely elevated, not separated from the disc by a deep impression, the base bisinuate, faintly impressed
on each side; the elytra are nearly flat above, sparingly punctured with large elliptical shallow fovea;, from
wliich proceed short bristles: the legs are short, the tarsi very short. The body beneath is black and glossy,
and finely punctured.
My figure of this species is engraved from a beautiful drawing by Wagenschieber, kindly sent to me by
Dr. Schaum.
Major Parry possesses a Californian specimen, lines long, which I believe must be referred to this species,
which has extremely short thick legs, the fore tibiiE with the two outer teeth almost obsolete, the tarsi not
more than twice th^ length of the tibial spurs, and the elytra faintly marked with irregular delicate luteous
transverse striolffi. If ultimately proved to be a distinct species, it may receive the name of Ci-. crassipes.
SPECIES 17 (103)—CREIIASTOCKEILUS CEENICOLLIS.
PLATE II, FIGS. 6 and 6 a.
Schaum MS.
; ; menti margine postico integro, paullo angulato ; capite dense pimctato ; pronoto, praìsertim ad
ilpturato; marginibus lateralibus crenulatis; antice minus attenuatis, aiigulis anticis magis promiii-
Depressus;
latera, rude sculpturato;
ulis; scutello acumiuato ; elytrorum lateribus rude et dense punctatis ; disco transverse rugoso; pygidio dense et
rude punctato.
Long. corp. lin. 5^.
Habitat; Santa Fe, New Mexico, on the western slope of the Rocky Mountains. Coll. Schaum, in Mus.
Berol. No. 41,581.
SYN.: Cremastocheihis crenwoUis. Schaum MS ; Harold et Gemminger, Cat. Col. p. 1339.
' Closely allied to Cr. Meoikamts Schaum, and as flat as the latter, but a little smaller. The under lip has no
trace of an 'incisura, but is a little produced behind. The angles of the elypeus are more rounded, the head
more densely punctured, the thorax much more coarsely sculiitured, especially at the sides; the lateral margm
crcnulated. It is less attenuated iu front than in Cr. Mexicarms, the incisnra on the inside of the anterior angles
much deeper, the anterior angles more produced, and a little turned inwards. The scutellum is smaller,
narroNver at the apex, mid more acuminated. The elyti-a are much more coarsely and densely punctured at the
sides, and on the disc transversely rugose. The spiracles of the antepenultimate segment are smaller ; the
pygidium much more coarsely aud densely sculptured.' (Schaum MS, in letter of 4th Sept, 1849.)
" My figure of this species is engraved from a drawing kindly sent to me by Dr. Schaum. His typical
specimen is no^v iu the Berlin Royal Museum, No. 41,581. The disc of the head is closely covered with sharp
small punctures ; the anterior margin rounded and raised ; the punctures of the prothorax emit small set®. It
is black beneath, evenly punctm-ed, and finely setose, the setae arising from the punctures.
This species is distinct from Cr. KnocJdi, judging from a specimen from Illinois from the Schaum Collection
K