OF THE UNITED BTA1 l.-. |., | 



the length of the Fourth. The front is slightly concave as in all the preceding sp i it -. a 

 character which with the finer and denser punctuation of the thorax and presternum, will 

 readily distinguish this from the next species. The legs se< m subj< cl to variation in co- 

 lour: sometimes they arc bright testaceous yellow, and sometimes very dark piceous. \ 

 typical specimen of Athous seneolus furnished me by Dr. Melsheimer is a male of the va- 

 riety \\ ith dark I 



G. A. dccoloratus, picco-nigcr, elongatns, cincrco-pubesccns, front.' plana, non 



xiusculo, latitadine longiore, sabtiliti r panotato, angalis posticis Bubdivei . po 



) striis profundis vix punctatis, interstil ■Niter pnnotnlatis, ontennis 



(basi sa?pe runs) articulo :> >' u vix dilatato, 4'° paulo ' . pedibue vel ti ] 



■35— -5. 



/.' Say, Trans. Am. Phil. Soc. 6, 180. 



Middle, Eastern, and Western States. Distinguished from the preceding by the punc- 

 tuation of the thorax being more distinct, the thorax itself less convex, and the front do! 

 concave, although marked with two faint impressions; the third joint <>f the antennas ap- 

 pears less d date I: in the male it is as long as the fourth; in the female somewhat shorter; 

 the sides of the thorax are almost straighl in the male, while m the female the) 

 rounded before the middle. Among the specimens in m\ collection are three well marked 

 typ< b, which, however, are not sufficiently distinct to stand ae 



u. Corpus nigrum, elytris tesl . pedibus t< vel fusco ■■ EL dee. Say.) 



e. Corpus nigrum, ped nisque basi flai il 



v. Corpus nigrum, antenn iceis. 



Of the first variety, the base of the antennas is sometimes almost testaceous; ol vari 

 I have 3een only females, and of (y) only males. 



7. A. in d is tine t us, picco-nigcr, elongatns ci . fi^nt<- <■ latitudino 



jiore, subtiliter, medio fere obsolete puncl tnc- 



tatis, interstitiis fere planis, subtiliter puree punctul non 

 dilatato (feminse -"■''■ vix longiore.) Long. '45. 



On.- specimen, Georgia, with the thorax moderately convex, and the Bides rounded 

 before the middle. Easily distinguished from any of the varieties of the two preceding 

 species, 1>\ the liner and more distanl puncl n the thorax, and ihe more < on< ave front. 



B. Thorax fissuris basalibus nullis, angiitis posticu //<■// carinaHs, 

 I. in cl an opli tli al in us, ca 

 tat<\ latitudino 1": 



elytris striis antice punctatis, interstitiis planis minus dense i • 

 rum articulo ultimo constricto. Long. '6 — '7. 



.1 Melsbeimer, -'. 164. 



Middl : .rare: as m the "ther species of this division, the front is slight!) con- 

 cave. This and the following specie I) related, thai it is very difficult to 

 point (llI t sufficient chai I i distinguish them; the differences in the shape ol the 

 thorax in the sexes of the st complicate the subject, as tb< pn coal 



