MR. A. MURRAY’S MONOGRAPH OF THE FAMILY OF NITIDULARIA. 239 
pubescent. Antennz with the club rather large and the articles moniliform. Head 
with a deep semicircular depression or canal in front at the base of the epistome, very 
faintly punctate, pubescent. Eyes large. Thorax subquadrate, the sides rounded, the 
anterior angles subrectangular, rounded; closely and irregularly punctate, pubescent ; 
the posterior angles rounded; base truncate, margined. Scutellum small, smooth. Elytra 
subparallel, about a half longer than the thorax ; darker at the apex ; shoulders prominent, 
irregularly punctate. Apex truncate, slightly rounded. Exterior apical angles rounded. 
Abdomen paler; very little of the penultimate segment exposed above; fimbrize distinct. 
By some this has been mistaken for a Rhizophagus and named R. adustus. 
From Cumana and Cuba. 
(Subgenus AMARTUS.) 
Leconte, in Proc. Acad. Nat. Sci. Philad. Nov. 1861, p. 343 (1861). 
Palpi labiales articulo ultimo elongato-ovali (see Plate XX XII. fig. 4, e) ; unguiculi simplices; mas pygidio 
segmentulo anali aucto. 
The outer lobe of the maxille is slender, not hooked at the point, but with a long 
terminal vesicle. Last article of the labial palpi elongate-oval; the maxillary palpi 
with the last article conical, a little longer than the preceding. The mentum is broad, 
emarginate in front. .The labrum is emarginate; the mandibles flat, scarcely toothed. 
The club of the antennz is 3-jointed and elongate. The second and third ventral seg- 
ments are shorter than the first and fourth, the fifth is the longest; in the males a small 
but distinct dorsal segment is added. The tarsi are dilated; the claws slender, a little 
broader at the base, but not toothed. 
15, CERCUS RUFIPES. 
Amartus rufipes, Leconte, loc. cit. 
Ovalis, parum convexus, nigro-piceus, helyo pubescens, confertim punctatus; prothorace 
longitudine fere duplo latiore, antice truncato, lateribus et basi rotundato, angulis 
posticis parum explanatis; elytris thorace sesqui longioribus, lateribus et apice late 
indeterminate rufo-testaceis; antennis pedibusque rufo-testaceis. Long. 13 lin., 
lat. 4 lin. 
. Habitat in California. 
Compared with the rest of the Cerci, this species is large. It is oval and convex, 
blackish piceous, covered with a close silky griseous pubescence, thickly and equally 
punctate both above and beneath. The antenn: are as long as the head and thorax 
united. The thorax is nearly twice as broad as long, the sides and base rounded, and the 
posterior angles somewhat expanded. Scutellum oblong; angles rounded, truncate at the 
apex. The elytra a half longer than the thorax, with the shoulders lighter, and the sides 
and apex broadly margined with an indeterminate rufo-testaceous margin. Below some- 
times concolorous and sometimes ferruginous. 
Found at Mendocino and in the neighbourhood of San Francisco in California, and 
probably throughout the whole of California. 1t does not appear to be rare, as I received 
many specimens from Mr. Hepburn of San Francisco. 
| 212 
