282 PROCEEDINGS OP THE ACADEMY OF 



Colymbetes densus, elongatus ovalis, postice paulo minus attenuate, 

 supra pallide flavus, capite nigro, antice flavo, macula verticali flavo, tli >race 

 rugis daedaleis minus subtilibus insculpto, macula media picea valde trans- 

 versa, elytris strigis profundis nigris valde approximatis, subtus rufo-piceus, 

 snturis, pedumque marginibus flavis. Long. "64. 



One male, Steilacoom, Mr. Gibbs. Similar in form to C. sculptilis, 

 but less attenuated behind ; with the transverse lines of the elytra yet 

 deeper and more approximate : these lines are black, and therefore the elytra 

 appear gray, but the pure pale yellow color appears at the side, suture and 

 base : there is besides a black spot on each about one-fourth from the tip. 



Necrophilus longulus, ellipticus, elongatus, nigro-piceus, nitidus, 

 thorace latitudine vix sesqui breviore, aequaliter convexo, parce punctato, 

 lateribus late rotundatus anguste marginatis, antrorsum paulo angnstato, an- 

 gulis posticis subrectis, fovea posticis utrinque prope angulum impressa, 

 elytris striis crenatis, interstitiis 3io, 5to et 7mo punctis paucis impressis, an- 

 tennis thorace haud longioribus, extrorsum incrassatis. Long. \L8. 



One specimen, (female) from Table. Mountain, below San Francisco, Cali- 

 fornia, collected by Mr. George Davidson. Very different by its narrow form, 

 and by the sides of the thorax not being depressed, from all the other species 

 seen by me. 



Catops pusio, ovalis, fuscus, helvo-pubescens, thorace latitudine plus 

 sesqui breviore, lateribus rotundatis, anaiulis posticis subrectis, subtiliter 

 dense strigoso, elytris postice rotundatis, transversim strigosis, stria suturali 

 antice vix abbreviata ; palpis antennarum basi apiceque Mavis. Long. '06. 



Punto de los Reyes, California ; Mr. Davidson. The antennae are a little 

 longer than the thorax, and moderately clavate. The mesosternum is strongly 

 carinate. 



Anisotoma morula, ovalis, convexa, piceo-nigra, nitida, thorace antror- 

 aum angustato, lateribus obliquis parum rotundatis, disco parce subtiliter 

 punctulato, elytris subtilius seriatim punctatis, interstitiis subtiliter pare 

 punctatis, alternis punctis paucis majoribus impressis. Long. "11. 



One specimen, Punto de los Reyes, California; Mr. Davidson. Of the size 

 of A. indistincta Lee but narrower, with the sides of the thorax less 

 rounded, and having the striae of the elytra composed of small close set punc- 

 tures. The thorax is not quite twice as wide as its length at base, and di- 

 minishes gradually to the apex, where it is only a little wider than its length : 

 the transverse impression near the base each side is as distinct as in the other 

 species. 



Lasconotus complex, linearis, sordide atra, opaca, capite concavo, thorace 

 latitudine fere longiore, quadrato, lateribus paulo undulatis, parallelis, rud 

 granulato, margine antico costisque utrinque duabus elevatis, interna apice et 

 basi breviter dislocata, disco excavato, elytris margine, sutura, costisque utrin- 

 que 4 elevatis, interstitiis biseriatim cribratis. Long. - 15. 



Punto de los Reyes, one specimen. A most interesting addition to our fauna. 

 The genus was founded by Erichson upon a nondescript Mexican species ; his 

 description is quoted by Lacordaire, who had no opportunity of examining it 

 in nature. It will be at once recognized by its concave head and three-jointed 

 club of the antennae. 



Odontaeus o b e s u s , rotundato-ovatus. valde convexus, piceo-niger, nitidus, 

 thorace basi rotundata, versus angulos vix sinuata, angulis posticis rectis, 

 elytris striis fortiter crenatis, antennis piceis. Long '45.' 



Femina. capite dense rugose punctato, tuberculo parvo frontali, plicaque 

 verticali signato ; thorace punctato, tuberculis duobus anticis plicaque trans- 

 " versa munito. Mas latet. 



Table Mountain, below San Francisco ; Mr. Davidson. Very much larger 



[Oct. 



