INSECTS COLEOPTERA. 
36 
distincta basali medio latiore signato, elytris testaceo-ruarginatis pone medium versus margi- 
nem longitudinaliter leviter impressis, lineis solitis punctatis distinctis ; subtus cum pedibus 
testaceus, suturis abdoininisque lateribus fuscis ; coxarum posticarum laciniis brevibus valde 
divergentibus rotundatis. Long, 1.03. 
One male, Prairie Paso; Dr. Cooper. Narrower and less convex tban usual, and tbus 
resembling in form D. conformis, perplexus, &c., of Europe. The thoracic basal yellow mar- 
gin is slender, it bends forwards half way between the basal angle and the scutel, and is then 
continued across parallel with the base, forming the outline of such a mark as is seen in 
D. anxius ; the basal edge and the scutel are reddish-yellow ; the line at the apex touches the 
margin only towards the angles ; in the middle it is bounded by the line of punctures ; the 
sides converge anteriorly, and are very broadly but regularly rounded. The elytra are very 
thickly punctulate, except towards the base, where they become almost smooth ; the submar- 
ginal longitudinal impression extends from the middle half way to the tip, but it is not well 
defined ; the subapical yellow band, usually seen on the elytra, is entirely wanting. 
Necropiiorus Fabr. 
N. poUinctor, niger, thorace ovali transverso, marginibus late depressis, disco tenuiter canali- 
culato, fortius transversim impresso, elytris parcius punctatis, macula latterali ad medium in 
epipleuram extensa, alteraque parva lunata ante apicem rubris ; pectore flavo-pubescente ; 
abdomine breviter griseo-ciliato, tibiis posticis rectis. Long. '58. 
Lec. Proc. Acad. Nat. Sc. 7, 19. 
Collected by Dr. Cooper, on the journey from Fort Vancouver to Yokolt Plains. Resembles 
in the form of the thorax, N. sexpustulaius, but the impressions are deeper. The margin is 
punctured ; the disc in one specimen is smooth, in another, obsoletely punctulate. The 
antenna3 are entirely black, I have not changed the name of this species, since i^. poZZmctor 
Mann, appears merely a slight variation of N. maritimus. 
Thinopinus Lec. 
T. pichts, testaceus vel pallidus, capite thoraceque nitidissimis hoc fascia interoculari ad 
latera postice flexa ochroleuca nigro-variegato, thorace postice subangustato, macula utrinque 
maxima aunulari postice interrupto nigra, elytris obsolete strigosis, annulo lato nigro ad 
humerum interrupto signatis, thorace duplo brevioribus, abdomine supra bifariam nigro-sig- 
nato. Long, "oo — "Vo, Tab. I, Fig, 12. 
Lec. Ann. Lyc. Nat. Hist, of New York, 5,216. 
Trichocanthus variegatus, Motsch, Etudes Entom., 1852, p. 78 ; Mann. Bull. Mosc, 1853. 
Found on the sea coast of California, as far south as San Diego ; on the wet sand below high 
watermark, on the open ocean shore; also found in Russian America, according to Motsch- 
ulsky. The very short elytra, which overlap each other at the suture, as in Xantholinus, 
and the absence of wings, renders this very distinct from every other genus of the tribe of gen- 
uine staphylinidae. 
HiSTER Linn. 
H. sellatus, oblongo-ovalis convexus niger nitidus, thorace latitudine duplo breviore bistriato, 
interstitio antice punctis paucis notato, lateribus et apice longe flavo-ciliatis, elytris rubris, 
