16 [February, 



the male, but is regularly oral in the female. Differs from the next by the longer 

 form. 



3. P. penicillatus, breviter obtuse ovalis, convexus, nigernitidus, elytris 

 obsoletissime substriatis, prope strias seriatim subtilissime punctulatis : antennis 

 ad basin piceis. Long. -13. 



Say, Journ. Acad. Nat. Sc, 4, 91. 



Kansas and California. By its larger size this species may be distinguished. 



4. P. p 1 i t u s , breviter obtuse ovalis, niger nitidus, elytris obsoletissime sub- 

 striatis, prope strias subtilissime seriatim jiunctulatis, antennis piceis, ad basin 

 palpisque testaceis. Long. -08. -09. 



Mels. Proc. Acad. Nat. Sc, 2, 102. 



Middle and Southern States, abundant. Verj^ similar in form and sculpture to 

 the preceding, but differs by the smaller size and testaceous palpi. The male is 

 slightly narrowed behind. 



5. P. p u ra i 1 i , breviter obtuse ovalis, niger nitidus, elytris obsoletissime 

 substriatis, prope strias subtilissime seriatim punctulatis, tibiis tarsis palpis an- 

 tennisque fusco-testaceis, his clava obscura. Long. -05. 



Two specimens, Georgia : very considerably smaller than P. p o 1 i t u s , which 

 it otherwise resembles. 



B. Thorax ad basin vix conspicue marginatiis. 



6. P. simplex, ovalis convexus postice angustatus, niger nitidus elytris 

 obsoletissime substriatis, antennis ad basin piceis. Long. -10. 



One specimen, Kansas. Nearly of the same form as P. ovalis, but somewhat 

 attenuated behind, and without any rows of fine punctures upon the elytra, ex- 

 cept very near to the apex. 



Olibrus Er. 



Palpi maxillares articulo ultimo ovali ; tibire tenues, calcaribus apicalibus con- 

 spicuis ; tarsi postici reliquis longiores, articulo secundo longiusculo; femora 

 baud ciliata. 



X. Metasternum antice productum, cum mesosterno connatum, protuberaus ; 

 (elytra striis internis duabus profundioribus). 



1. 0. b i c o 1 r , oblongo-ovatus, convexus, niger nitidissimus, elytris macula 

 rotundata anteapicali ornatis, substriatis, striis diiabus internis distinctis ; infra 

 rufus, antennis j)edibusque testaceis. Long. -08. -11. 



Er. Ins. Deutschl. IIG. (ubi synon. invenies.) 

 Phalacrus bicolor Gyllenhal. Ins. Suec. 3, 431. 

 Middle States, not common. Perhaps imported from Europe. 



2. 0. s triat ulu s , oblongo-ovatus convexus, niger nitidus, elytris tenuiter 

 striatis, interstitiis biseriatim subtilissime punctulatis ; subtus cum antennis 

 pedibusque rufo-testaceus. Long. -10. 



Middle States and Kansas. Of nearly the same form as the preceding, but a 

 little narrower with more distinct elytral strias. 



3. 0. rufipes, oblongo-ovatus, convexus, niger, nitidus capite punctate, 

 elytris tenuissirae striatis, interstitiis biseriatim obsolete punctulatis : subtus 

 nigro-piceus, antennis pedibusque rufis. Long. -08. 



One specimen, Shoa.lwater Bay, Oregon, Dr. Cooper. Of the same form as the 

 preceding, with the head more distinctly punctured. 



4. 0. seraistriatus, oblongo-ovatus, convexus, nigro-piceus, nitidus, capite 

 vix punctato, elytris striis antice obliteratis versus apicemvalde distinctis, inter- 

 stitiis biseriatim obsolete punctulatis ; subtus cum antennis pedibusque rufo- 

 testaceus. Long. -08. 



One specimen from Kansas. Also of the same form as the preceding. 



5. 0. rub ens, oralis convexus, ferrngineus nitidus, capite fere Lxvi, elytris 



