THE OIL AND BLISTER BEETLES. 



1357 



25is ( ). ZONITIS SULCICOIXIS SI). 110V. 



• „( fiuioo i-ir^i find ineso- and uieta- 

 Elongate-oblong. Antennae, occiput, tibus, taisi < 



~ b -u:t.,. T . ^ .,r, ^SCS^^^ 



ides and a,! the angles strongly rounded; disk uneven sparse!, - ^ ^ 



tte tpex of fifth ventral broadly and deeply concave. Length 8 nun. 



Lake County : rare. July 29. Taken from blossoms of the yet 

 low flowered thistle, Cnicus pitcheri Torr. Very dtsttnct from 

 mZa in color, difference in sculpture of elytra and « having 

 thoracic impressed line. 



Z. longicomis Horn, head nearly black, thorax darker at middle 

 legs and antennae pale, length 10 mm., was described from Central 

 Illinois. 



Tribe III. SITARINI. 

 To this tribe belongs a single North American ^f^^"" 

 nvinntipennis Riley, which is parasitic upon a g^nnd-bee (A ntko- 

 pora so.), which builds its nests in perpendicular clay banks. The 

 ZoZn of the beetle is very large, as in Meloe: elytra,^ W 

 and wings wanting. The head is triangular, thorax elongate, tarsal 

 claws cleft ; male with a double row of horny 

 plates on abdomen. It was described from 

 near St. Louis, doubtless occurs wherever its 

 host lives, and should be looked for in early 

 spring. 



Tribe IV. CANTHARINI. 

 Elongate, rather slender, subcylindrical 

 beetles, having the front marked with a dis- 

 tinct transverse suture prolonged beyond the 

 insertion of the antenna?; tarsal claws cleft to 

 base, the upper part not serrate, the two parts 



(Fig. 589.) Four of *.^^S5** 

 the twelve genera are represented in the col- 



in our genera subequal. 

 the twelve genera are 



lections, while members of two others perhaps occur 



KEY TO INDIANA GENERA OE CANTHARINI. 



• «. Second joint of antenme at least one-half as long as third. 



«, Second Joint of antenna, mnch less than half the length of 

 1). Next to last joint of tarsi bilobed. 

 Kb. Next to last joint cylindrical. 



