THE COMB-CbAWKD iJAEK BEETLES. 1277 



distinctly wider than thorax, sides subparallel ; surface with rather deeply 

 impressed rows of close-set pmictures; intervals nearly flat, finely and 

 densely punctate. Male with stouter antennae and with last ventral segment 

 deeply excavated. Length 6-7.5 mm. 



Marion, Hancock and Putnam counties ; rare. IMay 30-July 15. 

 Occurs beneath bark. One of the three specimens has the legs 

 wholly reddish-yellow. In the other two the front and middle fem- 

 ora and tibiae are piceous. 



IV IsoiriRA Muls. 1856. (Gr., "alike + part") 

 Rather small, oval brownish species, having the antennae slender 

 and filiform, the third joint usually nearly erjual to fourth. Of the 

 thirteen species recognized from the United States the following 

 have been taken or should occur in the State : 



KEY TO INDIANA SPECIES OF ISOMIBA. 



a. Above bieolored ; head and elytra piceous-blaek, thorax reddlsh-brown. 



BUFICOLUS. 



aa. Color above uniform or nearly so. 



6. Fourth joint of maxillary palpi long and slender ; elytral punctuation 



and pubescence exceedingly dense; color pale ochreous yellow 



throughout. 2.564. sericea. 



Vb. Pourth joint of maxillary palpi robust, the outer side but slightly 



longer than apex. 



c. Elytra without impressed lines on basal half, their punctuation 



sparse; third and fourth antennal joints equal in the sexes, or 



the third slightly longer than the fourth. 



d. Eyes small, separated by three times their width; length li- 



6.5 mm. 2:!6.'i. quadbisteiata. 



<1<J. Eyes large, coarsely ,i;ranulated, separated by less than twice 



their width; length 7 mm. 2.366. snims. 



ci: Elytra with fine but distinct impi-es.«ed lines throughout the full 



length, their punctuation dense; third antennal joint one-fourth 



shorter than fourth. 2367. oblonglxa. 



1. ruficollis Ham., length 4.2-5.2 mm., is known from near Alle- 

 gheny, Pennsylvania, and Cincinnati, Ohio. 



2364 (7607). Isomiea sebicea Say, Journ. Phil. Acad. Nat. Sci., Ill, 1824, 

 270; ibid. II, 159. 



Elongate-oval. Pale brownish-yellow throughout, feebly shining ; clothed 

 with fine, dense and short pubescence. Autenn;i_' two-thirds as long as body, 

 the third and fourth joints equal. Thoiax one-half wider than long, sides 

 straight and parallel to middle, thence rounded to apex, which is truncate 

 and one-half the width of base ; surface, as well as that of elytra, densely 

 and finely punctured. Elytra with two or three feebly impressed strire near 

 the suture, these more strongly marked near apex. Length 5-5.5 mm. 



Throughout the State; common, ilay ll-September 12. Oc- 

 curs on flowers of Jersey tea, wild hydrangea, etc. 



