ATOM ARIA. 475 



a ((. Thorax closely and finely punctured ; 

 length I — f line. 



Oblong oval, slightly convex. Red ; scutelluni, elytra 

 (except apex and breast) black ; legs yellow. Thorax con- 

 siderably narrower than elytra, sides slightly rounded, nar- 

 rowed from middle forward, convex, closely and finely 

 punctured, base with transverse impression with a little 

 fold at each end, basal border not more raised in middle 

 than at sides, posterior angles almost right angles. L. | 

 — f 1. Eather common. A. munda, Er. 



b h. Thorax rather diffusely and moderately 

 finely punctured ; length 1 line. 



Oblong oval, slightly convex. Darker or lighter brown ; 

 shiny ; shoulders and apex of elytra lighter ; breast, abdo- 

 men and antennae brown-red ; legs reddish-yellow. Thorax 

 a little narrower than elytra, sides slightly rounded and 

 finely bordered, gi'adually somewhat narrowed in front, 

 rather diffusely, moderately finely punctured, base with 

 transverse impression (deeper than in A. v/nthrina) with a 

 little fold at each end, basal border not more raised in 

 middle than at sides, anterior angles pointed, depressed, 

 posterior angles right angles. L. 1 1. Hare. 



A. impressa, Er. 



H S, Basal transverse impression on thorax, 

 without a fold on each side. 



Rather broad oval, convex. Bright red ; shiny ; elytra 

 deep black, shoulders and apex often brownish ; legs red- 

 yellow ; pubescence scarcely visible. Thorax nearly half 

 as broad again as long, rather narrower than elytra, sides 

 rounded, narrowed in front, diffusely and very finely punc- 

 tured, base transversely impressed in middle, basal border 

 more strongly raised in middle than at sides, posterior 

 angles nearly right angles. L. f 1. Moderately common. 



A. nigripennis, Payk. 



II. Posterior margin of thorax bisinuate. 



1, Base of thorax not bordered ; elytra entirely 

 black. 



Oblong oval, ratlier pointed before and behind. Black ; 

 antennae and legs rust-red ; very shiny, nearly bare, punc- 

 tuation diffuse and fine. Thorax broad, strongly convex, 

 with a deep transverse depression in middle of base, sides 



