NATURAL SCIENCES OF PHILADELPHIA. 43 



8. M. vicinum {Zimm. MSS.), sp. n. 



Depressed, subparallel, rather like M. augustatum ; brownish be- 

 neath, antennjB and legs pale yellowish-red ; head piceous, pale in 

 front, evidently punctate, front even ; thorax piceous, rather 

 coarsel}^ and closely punctate, sides hardly deflexed and but 

 little rounded ; elytra smooth, rather regularly punctate striate, 

 margins brown. L. .12. South Carolina. 



9. M. marginale (Zimm. MSS.), sp. n. 



Allied to M. vicinum in color and form, but the ocular sulci meet 

 across the front, which is evidently punctate and opaque; thorax 

 transverse, sides strongly rounded, but not much deflexed, finely 

 alutaceous, closely punctate; scutellum black; elytra tolerably 

 regularly punctate striate, margins pitchy. L. .16. North Caro- 

 lina, Kansas. 



10. M. floridanum, sp. n. 



Oblong subparallel depressed, entirely testaceous, surface alu- 

 taceous ; head with the ocular sulci well marked, meeting in the 

 middle, and with a short impressed medial line ; thorax finely, 

 obsoletely, and sparingly punctulate, sides not strongly rounded; 

 elj'tra regularly punctate striate, eighth interstice broad, inclos- 

 ing two small strige. L. .18. Florida (Doubleday), 



Distinct b}' the finely punctulate thorax and alutaceous sculpture. 



11. M. pallidum (Say), J. Acad., iii. 446. 



Oblong, testaceous red ; head as in M. floridanum ; thorax shin- 

 ing, evidently and tolerably closely punctate, sides rather de- 

 flexed, strongly rounded ; elytra regularly striate as in M. flori- 

 danum. L. .12-.13. North Carolina (Zimmerman). 



12. M. laevicolle (Zimm. MSS.), sp. n. 



Oblong, entirely testaceous, and closely allied to M. jmlliduin; 

 but front even, head and thorax smooth, shining, the latter more 

 produced in front, less transverse, sides rounded. L. .11. North 

 Carolina (Zimmerman). 



13. M. pellucidum (Zimm. MSS.), sp. n. 



Allied to M. leevicoUe, with which it agrees in the less trans- 

 verse more deflexed thorax; head smooth, sulci deep, meeting in 

 the middle, medial line impressed ; thorax shining, sparingly 

 punctulate; elytra finely punctate striate, strias obsolete beyond 

 the middle. L. .11. North Carolina (Zimmerman). 



