THE OIL AND BUSTER BEETLES. 



1350 



Fig 590 Feraale beetle . X2;ail - 

 ( male '"^"'ff ft. ( ^ 



Chittenden in Bull. 43, U. !>. Div. Knt.) 



2520 (80(il). MACROBASIS UNICOLOK Kirby, Faun. Bor. Amer.. 1s.",7. 241. 

 Elongate, subcylindrical. Black, rather 



densely clothed with grayish hairs which give 

 an ashen hue to the upper surface. Thorax 

 slightly longer than broad, otherwise as iutorsa. 

 Second joint of male antenna? slightly longer 

 than the next two and nearly twice as wide; in 

 female one-half longer than third. Length 8- 

 15 mm. (Fig. 590.) 



Throughout the State, frequent; more 

 so in the northern counties. May 21-Au- 

 gust 6. Commonly known as the "ash- 

 gray blister beetle" and occurs on false in- 

 digo, Kentucky coffee tree and other 

 legumes; also on potatoes and ironweed, it 

 and one or two species of Epicauta being 

 among the few living creatures which will attack the leaves of the 

 last-named plant. 



2521 (- -). MACROBASIS FI-AVOCINEREUS sp. nov. 



Slightly narrower and more parallel than uii'x-olor. Pubescence yel- 

 lowish-gray. Second joint of male antenna* shorter and nut much wider 

 than the next two; of female scarcely longer than third. Maxillary palpi 

 much longer and stouter than in mi/color. All the femora of male, and es- 

 pecially the hind ones, with a fringe of long hairs on the hind margins, the 

 hairs curved near tips. Length 12-13 mm. 



Starke County; rare. July 1. Very distinct from unicolor in 

 the form of antennal joints and pubescence of femora of male. 



2522 (8068). MACROBASIS IMMACULATA Say, Journ. Phil. Acad. Nat. Sci.. 



III. 1S24. 304; ibid. II, 170. 



Elongate, male rather robust. Black, densely clothed with yellowish 

 or grayish pubescence. Thorax slightly longer than wide, otherwise as in 

 torxa. Elytra gradually broader behind the middle, especially so in male. 

 First joint of male antenna? less than half the length of head; second joint 

 shorter than third. Female with second joint as long as or slightly longer 

 than third, and the first more slender than in male. Length 13-2:; mm. 



Southern half of State ; scarce. May 24- August 2. Occurs on 

 goldenrod and wild morning-glory. 



Tetraony.r quadrimaculata Fait., head black, elytra yellowish, 

 apical third and large humeral spot black, length 10 mm., is known 

 from Georgia and North Carolina, and may occur in southern 

 Indiana. 



VI. EPICAUTA Redt. 1849. (Gr., "upon + burn.") 



The members of this genus closely resemble those of Macrobasis 

 in form and are separated only by the difference in the basal joints 

 [8(i 23402] 



