352 PROCEEDINGS OF THE ACADEMY OP 



related to P. ater, but differs by the form of the thorax, and by the pubes- 

 cence being more dense, and less fine ; from P. 1 a t i c o 1 1 i s it differs by the 

 thorax being much less rounded on the sides, more emarginate at the apex, 

 causing the anterior angles to be quite distinct, and the hind ones less ob- 

 tuse. 



4. P. 1 a t i c o 1 1 i s. Dasytes laticollis Mann. Bull. Mosc, 1843, 247. 

 California, near San Francisco. I am indebted to Col. Motschulsky for a 



type of this species; other specimens were found by Mr. G. Davidson at Cape 

 Keyes. The thorax is wider than long, much rounded on the sides, equally 

 narrowed at base and apex, with the hind angles indistinct. 



5. P. ful vi tar sis Bland, Proc. Ent. Soc. Phila., iii., 254. 



Middle California, Mr. Ulke A slender species, still smaller than the pre- 

 ceding, with the thorax scarcely wider than long, fringed with long hairs on 

 the sides, which are broadly rounded, and with the hind angles distinct, ob- 

 tuse. r lhe antennae are black, and the legs testaceous, with the thighs some- 

 what darker. In the male the sixth ventral segment is visible ; the fifih joint 

 of the antenna? in both sexes is wider than the sixth, and the fourth joint is 

 triangular, rather broader than long. 



6. P. atricornis, elongatus, nigro-a?neus, pube cinerea minus subtili 

 dense vestitus, capite subtiliter haud dense punctato ; thorace capite paulo 

 latiore, convexo modice punctato, latitudine loagiore, antrorsum subangus- 

 tato, lateribus paulo rotundatis pilis longioiibus fimbriatis, basi rotundata, 

 angulis posticis rotundatis ; elytris thorace vix latioribus, convexis, sat dense 

 punctatis, transversiin subrugosis, margine laterali pilis longioribus fiinbri- 

 ato ; antenuis nigris, pedibus rufo-testaceis. Long. 4 mm. 



Fort "Whipple, Arizona, Dr. E. Coues, U. S. A. The autennse are as long as 

 the head and thorax ; the third joint is slender, and longer than the fourth, 

 which is somewhat triangular; the fifth is not wider than the sixth ; the 

 eleventh is one-half longer than the tenth, oval and subacute at tip. This 

 species in color resembles P. fulvitarsis, but is much larger, with the 

 thorax slightly narrowed in front, and the legs of a uniform bright reddish- 

 yellow. The anterior tibia? on the outer margin are armed with 5-7 small 

 spines. 



7. P. convergens, elongatus ae.neo-fuscus, nigricans, pube subhelva 

 minus subtili dense vestita, capite parce punctulato ; thorace capite paulo lati- 

 ore, convexo modice punctato, latitudine longiore, antrorsum sensim angus- 

 tato, lateribus paulo rotundatis, basi cum angulis posticis rotundata; ely- 

 tris thorace vix latioribus, convexis sat dense punctatis et transversim ru- 

 gosis, humeris, indeterminate rufescentibus ; ore, antennis pedib usque rufo- 

 testaceis. Long. 4 mm. 



One specimen from Fort Whipple, Arizona, Dr. Coues. This species closely 

 resembles the preceding in size, form and sculpture, but the pubescence is 

 yellowish, and the antenna? and oral organs are not black but reddish-yellow. 

 The color is brownish- black, with a faint metallic tinge, and the humeri are 

 distinctly reddish brown. The antenna? are out little longer than the head, 

 the third joint is slender, not longer than the fourth, which is triangular 

 and nearly equal to the fifth, which is not wider than the sixth ; the tenth, 

 as usual, is oval, acute, and longer than the preceding. 



8. P. umbratus, elongatus, fusco-aeneus, sat dense minus subtiliter 

 cinereo-pubescens, pilis vix longioribus concoloribus intermixtis, thorace lati- 

 tudine paulo breviore, antrorsum sensim angustato, lateribus parum, basi 

 magis rotundatis, apice haud emarginata, angulis obtusis, parce subtiliter 

 punctato ; elytris ferrugineis sutura late infuscata, sat dense punctatis ; abdo- 

 minis apice pedibusque late ferrugineis, antennis palpisque piceis, vel nigris. 

 Long. 2 5 mm. 



[Dec. 



