THE LADY BEETLES. 



519 



990 ( ). Axion plagiatum Oliv., Ent. VI, 1808, 1044. 



Broadly oval, very convex. Black, strongly shining; head and nar- 

 row space near apical margins of thorax reddish ; elytra each with a large 

 round, brick-red spot on sides in front of middle. Beneath reddish-yel- 

 low, the middle of abdomen black. Length 6.5 mm. 



Known from the State by a single male taken by Wolcott near 

 Pine, Lake County. May 20. Resembles Chilocorus bivulnerus, 

 but much larger, more convex and with smooth upper surface. The 

 head is usually wholly black and the red spot of elytron is said to 

 be much larger in female than in male. 



Tribe IV. GENEINI. 



The principal characters of this group are set forth in the 

 tribal key. The species are glabrous or nearly so and are among 

 the most minute members of the Coccinellida?. The tribe is repre- 

 sented in North America by the single genus : 



XII. Delphastus Casey. 1899. 



Antenna? well developed, with a compressed elliptical club ; tho- 

 rax as wide as. elytra, short and transverse; scutellum well de- 

 veloped, a little longer than wide; coxae all remotely separated; 

 front femora greatly dilated, when in repose completely conceal- 

 ing the tibia? and tarsi. 



991 (3088). Delphastus pusillus Lee, Proc. Phil. Acad. Nat. Sci., VI, 



1852, 135. 



Oblong-oval, when in repose almost globose. Black, very shining ; head, 

 legs and sides of thorax pale in the male. Head and thorax finely, sparsely 

 punctate ; the latter distinctly margined. Length 1.3-1.5 mm. 



Throughout the State ; frequent. April 28-August 11. Beaten 

 from vegetation or taken from beneath stones. 



< i 

 Tribe V. HYPER ASPINI. 



Species below the medium in size, and having the body oval or 

 hemispherical, compact and usually contractile ; antennae short and 

 H-jointed; epipleura?, in our genera, hollowed out for the reception 

 of the knees of middle and hind legs ; scutellum well developed and 

 triangular; legs short, stout and strongly retractile; front coxae nar- 

 rowly separated; prosternum flat. Two genera are represented in 

 Indiana. 



KEY TO INDIANA GENERA OF HYPERASPINI. 



a. Front tibiae with a strong spine on outer edge near middle ; eyes with a 

 small emargination in front. XIII. Bbachyacantha. 



aa. Front tibiae without spines ; eyes entire ; elytral spots well defined and 

 usually fewer in number. XIV. Hyperaspis. 



