THe LEAF Beetles. 1133 



2096 duiy.',). MoNAciius SAPONATis Kabr., Syst. Eleut., II, ISnl, 55. 



Ovate. Dark steel blue, shining; labrum and four basal joints of an- 

 teun;e dull yellow. Thorax \\'itU scattered shallow punctures near the base. 

 Elytral puncturus coarse on basal half, finer and subobsolete near apex. 

 Length 2-2.5 mm. 



Throughout the State; frequent. .May 29-August 15. Taken 

 liy heating and sweeping foliage. 



XVIII. DiACHUs Lee. 1880. 



Very small, subcylindrical oval species, having the tarsal claws 

 broader at base; antenna; not more than half the length of body, 

 with joints 6 to 11 liroader; pxe^ feebly emarginate; thorax as wide 

 rs elytra; prosttrnum usually quadrate and flat, 



KEY TO INDIANA SPIOCIES OF DIACHUS. 



a. Head and thora.x dark metallic; scutellum obtusely triangular. 

 h. Upper surface not uniform blue. 



c. Scutellum flat; head and thorax dull reddish-brown; elytra brassy 

 green ; legs yellow. 2007. auratus. 



ce. Scutellum elevated behind; upper surface dark bluish-green; an- 

 tennae and legs reddish-brown. 201 IS. catarius. 

 6?;. Upper surface uniform blue; antenn;e and legs yellow. 



2099. pallidicornis. 

 (III. Head and thorax yellow ; elytra metallic green ; scutellum acutely tri- 

 angular. 2100. CI-ILORIZANS. 



2097 (0707). DiACHUS aueatus Fabr., Syst. Bleut, II, 1801, 57. 



Oval, subcylindrical. Head and thorax reddlsh-browii, bronzed; elytra 

 brassy green or brownish ; antennae, legs, sides and under surface of thorax 

 dull yellow ; abdomen black. Thorax very finely alutaceous. Rows of ely- 

 tral punctures fine but complete. Length 1.5-2 mm. 



Throughout the Stfiti;; common. May 31-August 7. Taken by 



sweeping and beating. 



2098 (0712). Diachus catakuis Suftr., Linnea. Entom., VII, IS.i:^,. i;s. 

 Form of auratus. Dark bluish-green, shining. Antennie, legs .'md pro- 

 sternum dull .vellow. Thorax distinctly alutaceous. I'lmctures of elytra 

 coarser than in unniliix. Length 2-2.5 mm. 



ilarshall, Starke, Kosciusko and Knox counties; scarce. June 

 11 -July 15. 



20it!) Oi713). DiAcnus paixidicorhis Suffr., Linnea. Entom., VII, 1853. 



Oval. subcy]indric-,-il. Dark steel-blue, shining; antennfe and legs yel- 

 low. Thorax finel.v alutaceous, not puncfured. Elytral punctures rather 

 coarse. Length 2-2.5 mm. 



Throughout the State; frequent. May Il-July (i. Taken by 

 beating and sweeping foliage. 



