NATURAL SCIENCES OF PHILADELPHIA. 355 



20. P. cruralis, elongatus fusco-aeneus, pube minus subtili cinerea 

 vestitus, pilis brevibus concolonbus intermixtis, capite thoraceque sat dense 

 subtilius punctatis, hoc latitudine sesqui breviore lateribus et angulis fortiter 

 rotundatis, basi late rotundata ; elytris subtilius punctatis; antennis palpis 

 femoribusque nigris, tibiis tarsisque flavo-testaceis. Long. 2-5 mm.- 



Two specimens, Oregon, Dr. G. H. Horn ; the sixth ventral pegment is visi- 

 ble in each, and is not impressed. This species is very similar to P. sq ual i - 

 d u s, but the erect hairs are much shorter, and of the same color as the pube- 

 scence, and the tibia 5 and tarsi are pale. 



21. P. aenescens. Dasytes xn. Lee, Proc. Acad. Nat. Sc, vi. 170. 



San Diego and the Islands off Santa Barbara. The pubescence is very fine, 

 and the intermixed black hairs numerous ; the thorax is a little wider than 

 long, more rounded on the sides than in the preceding, but with the hind 

 angles somewhat distinct; the elytra are a little wider than the thorax, and 

 much more coarsely punctured than in the allied species. 



22. P. punctipennis, elongatus, niger nitidus subaenescens, pubc 

 cinerea 'subtili vestitus, (pilis nigris erectis intermixtis?) capite thoraceque 

 parce punctulatis, hoc latitudine vix breviore, lateribus rotundatis, basi ro- 

 tundata, angulis posticis obtusis parum distinctis; elytris thorace vix latiori- 

 bus parcius profunde punctatis. Long. 2-25 mm. 



Santa Catalina Island, California; five specimens in bad condition. Much 

 smaller than P. aenescens, with tbe thorax less transverse, and the sides 

 gradually converging, and less rounded before the middle. 



The erect hairs are nearly all rubbed off in the specimens before me, but 1 

 think that the species belongs to the present group. 



23. P. grandiceps, elongatus, aeneo-niger, pube subtili cinerea minus 

 dense vestitus, pilis nigris erectis intermixtis, capite magno, antice depresso 

 laevi, inter oculos convexo parce punctulato, pone oculos puuetato ; thorace 

 capite paulo angustiore, latitudine sesqui breviore, apice truncato, basi late 

 rotundata, lateribus modice rotundatis, angulis posticis obtusis indistinctis ; 

 elytris thorace vix latioribus, sat dense profunde punctatis. Long. 5 mm. 



Middle California; one specimen given me by Mr. Ulke. As usual, the 

 under surface is densely clothed with cinereous hair; the large size of the 

 head enables this species to be recognized at first sight. 



24. P. pedalis, elongatus, nigro-aeneus, pube subtili cinerea sparse 

 vestitus, pilis nigris erectis intermixtis; capite thoraceque parce punctulatis, 

 hoc latitudine breviore, lateribus rotundatis, basi late rotundata, angulis pos- 

 ticis obtusis fere indistinctis ; elytris thorace baud latioribus, fortiter puncta- 

 tis et transversim subrugosis ; antennarum articulis 2 4 piceis, pedibus fer- 

 rugineis vel piceis. Long. 3-5 4 mm. 



Santa Catalina Island, California. This species has the usual form, the 

 thorax being more than one-third wider than the head, and resembles in ap- 

 pearance P. T ej o n i cu s ; it is distinguished by the red or brown feet, and 

 the more strongly rounded sides of the thorax. In the specimens with dark 

 feet the tibiae and tarsi are paler than the femora, which are sometimes 

 nearly black ; such specimens may be distinguished from P. conformis 

 by the finer cinereous pubescence and the more strongly punctured elytra, 

 and from P. aenescens by the thorax being as wide as the elytra. 



25. P. texanus, elongatus, nigro-aeneus, pube cinerea elongata minus 

 subtili laxe vestitus, pilis longis nigris erectis intermixtis, capite thoraceque 

 minus subtiliter punctatis, hoc latitudine breviore, lateribus fortiter rotunda- 

 tis, basi late rotundata, medio subemarginata, angulis posticis obtusis rotun- 

 datis ; elytris fortiter punctatis, antennis piceis, articulis 2 4 pallidioribus, 

 pedibus ferrugiueis. Long. 3-5 mm. 



Two specimens, Texas. Differs from all the preceding species of this group 



1866.] 



