46 U. S. p. R, R. EXP. AND SURVEYS ZOOLOGY 47TH PARALLEL. 
Sacramento, Mr. Wittick. In form this species resembles P. mucidus, but the pubescence 
is brownish gray and more sericeous. The thorax is more convex ; and the deep transverse 
impression between the eyes is very different from the vague rounded one seen in P. mucidus. 
The discovery of a second species of this curious genus is of great interest, and it gives me pleasure 
in naming it to commemorate the disinterested services of the gentleman by whom it was 
collected. 
Athous Esch. 
A scisstis, ater nitidus, tenuissime pubescens, thorace latitudine longiore, confertim punctato, 
lateribus fere rectis parallelis modice reflexo-marginatis, angulis anticis oblique truncatis ; elytris 
profunde striato punctatis, interstitiis parce punctatis, antennarum articulo 3io triangulari quarto 
paulo breviore ; tarsis baud lobatis. Long. "58. 
One specimen, Oregon, Dr. Cooper. Smaller and a little narrower than A. reflexus Lec. 
(Trans. Am. Phil. Soc. 10, 427,) but nearly allied to it. 
LiMONius Esch. 
L. ornatulus aeneo-niger, griseo-pubescens, clypeo late emarginato vix concavo, thorace 
confertim punctato, latitudine longiore, antrorsum paulo angustato, lateribus late rotundatis 
elytris striis bene impressis punctatis, interstitiis punctatis parum convexis, macula utrinque 
oblonga basali suturaque fulvis, pedibus piceis, tibiis testaceis ; antennis nigris, articulis 2 et 
3io aequalibus 4to coniunctis baud longioribus. Long. -2. 
San Francisco, Mr. Child, one specimen. This species belongs to the division in which the 
lateral suture of the prosternum is excavated anteriorly. It may be placed in the vicinity of 
L. basillaris, Lec, (Trans. Am. Phil. Soc. 10, 431,) though the legs are only in part testaceous. 
The posterior angles of the thorax are rectangular and slightly testaceous. 
CoKYMBiTES Latr. (emend. Lec.) 
C. SucMeyi, niger glaber, nitidus longiusculus, thorace latitudine longiore, lateribus late 
rotundatis, ante medium subangustato, angulis posticis vix divericatis, antice dense, postice in 
medio obsolete punctato, pone medium canaliculato ; elytris thorace baud latioribus, fortius 
marginatis, subtiliter rugosis striis tenuibus punctatis, interstitiis paulo convexis parce punctu- 
latis, macula elongata marginali ante medium intus curvata, et ad suturam fere extensa^ 
alteraque transversa lunata ad dodrantem ornatis ; scutello dilatato griseo-jjiloso ; antennis 
articulo 3io baud dilatato, 4to sequente vix maiore. Long. '53. 
Steilacoom, George Gibbs, esq., one specimen. It affords me much pleasure to dedicate this 
beautiful species to Dr. Suckley^ my esteemed friend, who, by his active and scientific zeal, 
has added so many new objects to the fauna of the regions explored by him. 
Although resembling in many characters, as well as by its form, C. aratus, Lec, (Trans. 
Am. Phil. Soc. 10, 438,) this species seems, from its dilated scutel and glabrous body, to indi- 
cate a new section of the genus, to be placed between the first and second established by me. 
C. fest'iviis, crassiusculus, vix tenuiter pubescens, niger, thorace quadrato, modice convexo, 
lateribus antice rotundatis, angulis posticis paulo divaricatis, confertim punctato sanguineo, 
vitta lata dorsali, margine laterali prosternoque nigris ; elytris testaceis, sutura (antice latiore,) 
