THE LEAF BEETLES. 



1133 



2096 (6703). Monachus saponatus Fabr., Syst. Eleut, II, 1801, 55. 



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

 tennae dull yellow. Thorax with scattered shallow punctures near the base. 

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

 Length 2-2.5 mm. 



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

 by beating 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 broader; eyes feebly emarginate; thorax as wide 

 fs elytra ; presternum usually quadrate and flat. 



KEY TO INDIANA SPECIES OF DIACHUS. 



a. Head and thorax dark metallic; scutellum obtusely triangular. 

 &. Upper surface not uniform blue. 



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

 green ; legs yellow. 2097. auratus. 



gc, Scutellum elevated behind; upper surface dark bluish-green; an- 

 tenna? ^md legs reddish-brown. 2098. catarius. 

 Upper surface uniform blue ; antenna? and legs yellow. 



2099. PALLIDICORNIS. 



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

 angle 2100. CHLORIZANS. 



2097 (6707). Diachus auratus Fabr., Syst. Eleut., II, 1801, 57. 



Oval, subcylindrical. Head and thorax reddish-brown, bronzed ; elytra 

 brassy green or brownish; antenna?, 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 State; common. May 31- August 7. Taken by 

 sweeping and beating. 



2098 (6712). Diachus catarius Suffr., Linnea. Entom., VII, 1853, 68. 

 Form of auratus. Dark bluish-green, shining. Antenna?, legs and pro- 

 sternum dull yellow. Thorax distinctly alutaceous. Punctures of elytra 

 coarser than in auratus. Length 2-2.5 mm. 



Marshall, Starke, Kosciusko and Knox counties; scarce June 

 11-July 15. 



2099 (6713). Diachus pallidicornis Suffr., Linnea. Entom., VII, 1853. 

 Oval, subcylindrical Dark steel-blue, shining; antenna? and legs yel- 

 low. Thorax finely alutaceous, not punctured. Elytral punctures rather 

 coarse. Length 2-2.5 mm. 



Throughout the State; frequent. May 11-July 6. Taken by 

 beating and sweeping foliage. 



