DESCRIPTIONS OP NEW SPECIES. 9 



opaciusculis, tenuiter striatis, interstitiis planissimis, 3io tripunctato, 

 antennis palpisque nigris ; subtus obscure aeneus. Long. -38. 



Kansas; Mr. Hike. Kelated to P. cupripennis, but differs by 

 the form of the thorax, as well as by the color. The opacity of 

 the elytra gives a sericeous lustre to the surface. 



2 1 ?. P. crenistriatUS. Longiusculus, niger nitidus, thorace ovali, 

 latitudine paulo longiore, margine lateral! angusto, ad basin utrinque 

 fovea parva profunda impresso, linea dorsali tenui, elytris ovalibus 

 thorace latioribus basi paulo emarginatis, striis profundis fortiter puncta- 

 tis, interstitio 3io tripunctato, pedibus rufo-testaceis, antennis palpisque 

 piceis, basi rufo-testaceis. Long. '30. 



Illinois. Of the same size and form as P. pimctiformis, but 

 differs by the very strongly punctured elytral striae, and by the 

 smaller and deeper basal impressions of the thorax. 



28. P. perforatlis. Capite thoraceque viridiaeneis nitidis, hoc ru- 

 goso, subrotundato latitudine fere sesqui breviore, postice paulo angus- 

 tiore, margine lateral! depresso postice latiore et subreflexo, impressioni- 

 bus posticis latis haud profundis magis rugosis, elytris cupreo-aeneis, 

 thorace latioribus basi truncatis, striis tenuibus punctulatis, interstitio 

 3io foveis 3 vel 4 magnis impressis ; subtus, antennis pedibusque nigro- 

 aeneis. Long. -30. 



Methy, Hudson's Bay Territory ; Mr. R. Kennicott On the 

 right elytron are seen four fovese placed as in P. 8-punclatus ; on 

 the left are but three ; from the position of the 3d I think that the 

 normal number is four. 



EYARTHRUS LEG. 



29. E. torviis. Niger (mas) nitidus, thorace subcordato latitudine 

 paulo breviore, lateribus rotundatis postice breviter sinuatis, angulis 

 posticis rectis prominulis, basi apice vix angustiore, linea dorsali in- 

 tegra, basi utrinque bistriata, profunde impressa et rugosa, carina ex- 

 terna distincta, elytris ovalibus, striis fortiter punctatis ad apicem minus 

 profundis. Long. '70. 



Kansas ; Mr. Ulke. This species has the 8th stria not closely 

 approximated to the marginal one, and is allied to E. orlatus, but 

 differs by the much more strongly punctured elytral striae, as well 

 as by the form of the thorax and elytra; the former is less narrowed 

 behind, and less strongly rounded on the sides than in E. orbatus, 



