OF rilF. UNITED STATES. 



A. Thorax angulis posticis non carinalis, apict rotundatis. 



* Atitt 

 1. 1'. trivit tatus, fusco-testacens, cinereo-pubcsccns, thorace oonvi . lateriba 



confertim subtilius pnnctato, elytria rnfo-piceis, Butnra margineqne infosoatia, Btriia punctat 

 Btitiia planis, sat dense pnnctatia, frontc non impress:. . i. '.I. 

 ua trivittatus Melsheimer, Proc. Acad. Nat. So. 2, 157. 



One specimen in Dr. Melsheimer's collection. This species differs from all the oth 



in having the front not impressed and hardly produced. The antennas and feet are pale 



testaceous. 



** Antenna 



2. P. Brightwelli, fnsens, vel tcstaccus pubescens, thorace elongato, plus i 

 convexiusculo, confertim pnnctato, elytria striis valde pnnctatia, interatitiia rnin i 



ct parcc rugosis, versus basin imprcssis ct tcstaceis. Lou-. -IJ -IT. 

 Borby, Fauna Bor. Am. 1 til. 



Wis Mels. Proc. Acad. Nat. Sc. 2, I 

 Athous arcticol Proc. Acad. Nat. Sc. 2, 1 



Middle and Southern Stales, not rare. The specimen described by Kirbj to 



have been a pale coloured variety of this species, which varies much in colour. In the male 

 the thorax is constricted before the posterior angles, which arc slightly dii rgenl : in the 

 female, the sides are straight and the angles do not diverge; the dorsal channel is n 

 deep, and is frequently wanting. 



3. P. acanthus, :eneo-piccu3, pubescens, thorace elongato, convexo, snbtUina puncl pilia 

 centibna, elytria Btriia valde pnnctatia, intcrstitiis minus convexia | 



piplenria pedibna antennarnmque baai teataceis. Long. -27 

 Say, Trans. Am. Phil. Soc. 6, L78. 



New Jersey, Mr. Guex; a typical specimen in Dr. Harris' collection. Differs from the 



. and more convex and more finely punctured thorax. < Otherwise 

 there appears to be no satisfactory difference ; the front is Bomctiraes testaceous; pro- 

 bably pale-coloured vai will occur. 



B. 77 'iliter carinalis, apict rotundai 



I. P. scapnlaria, atcr ubtiliter foaco-pul 



-iuie pie. igulia postici- ignlari margini a] ; 



tincta, elytria macula baaali In titiia acabro-punctal . 1. -I. 



/• . Trans. Am. Phil. Soc. 6, 1 1 



The typical specimen from New Hampshire kindly loaned me b) Dr. Harri , The 



feet and antennas are entirely black. The lobes of the tarsi .ire -mailer than in the other 

 species, and with Bome contained in Vthous, would Beem to indicate thai the two 



genera should he united. The ant< in the nexl -■> i ii . are < Ion ;atod. 



nculla' mn 



