THE LADY BEETLES. 



531 



terminal segments pale. Thorax very sparsely punctate, the basal marginal 

 line distinct. Elytra rather coarsely but not closely punctate. Length 

 1.8-2.2 mm. 



Throughout the State; frequent. May 11-November 28. 



1016 (3156). Scymnus tenebeosus Muls., Spec. Sec, 1850, 989. 

 Broadly oval, strongly convex. Uniform black, shining ; sparsely pubes- 

 cent; legs red or reddish-brown. Thorax narrowed in front, sides feebly 

 curved, surface finely, equally and sparsely punctate. Elytra much more 

 coarsely and closely punctured than thorax. Length 1.8-2.3 mm. 



Three specimens from near Pine and Hessville, Lake County, 

 and one from "Warren County. May li-July 14. Should occur 

 throughout the State. 



S. nanus Lee, legs reddish, length 1.3-1.5 mm., is known from 

 Michigan and Florida. S. pumtatus Melsh., length 1.5 mm., is 

 recorded from Canada, Pennsylvania and Texas. 



XVII. Stethorus Weise. 1891. (Gr., 1 ' breast + margin.") 



The members of this genus are nearly as small as those of Smilia. 

 They differ irom Scymnus, as shown in the generic key, mainly in 

 the structure of the front of head and prosternum. 



1017 (3160). Stethokus punctum Lee, Proc. Phil. Acad. Nat, Sci., VI, 



1852, 141. 



Broadly oval, convex. Black, shining; antennae and legs yellow, the 

 femora black, with the apex pale. Thorax narrowed in front, the surface 

 sparsely punctate at middle, more densely and coarsely at sides. Elytra 

 sparsely but distinctly punctate ; covered with a sparse and fine pubescence. 

 Length 1.2-1.5 mm. 



Throughout the State ; frequent. April 17-October 17. Taken 

 by sifting rubbish from damp hillsides and borders of marshes. 



XVIII. Cephaloscymnus Crotch. 1873. (Gr., "head + cub.") 



Small, oblong-oval, rather depressed pubescent species, having 

 the front coxal cavities open behind; head large, front vertical; 

 last joint of maxillary palpi long, slender, pointed ; thorax at base 

 narrower than elytra; prosternum short and broad. 



1018 (3169). Cephaloscymnus zimmermanni Crotch, Trans. Amer. Ent. 



Soc, IV, 1873, 382. 

 Broadly oval, feebly convex. Black, slightly bronzed, sparsely clothed 

 with gray pubescence; legs piceous, tibiae and tarsi paler. Thorax three 

 times as wide at base as long at middle, coarsely and closely punctured : 

 front angles prominent on account of the deeply emarginate apex. Elytra 

 more sparsely and coarsely punctate than thorax. Length 1.5-2.2 mm. 



