302 FAMILY IX, — SCYDM^NID^. 



5S5 ( ). ScYDM^NUs RADIUS Casey, Ann. N. Y. Acad. Sci., VII, 1S97, 



475. 

 Oval, i-atber strongly inflated. Piceons, shining; elytra reddish-brown, 

 sparsely clothed with rather long, yellowish recurved hairs; antenmB and 

 legs pale reddish-brown. Head much wider than long; eyes prominent. An- 

 tennae a little less than half the length of body, the joints somewhat bead- 

 like, the outer ones gradually enlarged. Thorax as long as wide, one-fourth 

 wider than head, dilated and narrowly rounded at apical third, the sides 

 thence converging and broadly sinuate to base, the fovejie small but distinct. 

 Elytra four-fifths wider than thorax, sparsely and rather finely but dis- 

 tinctly punctate ; inner basal fovea large. Length 1.1-1..3 mm. 



Wayne County; scarce. May 26. 



S. corpusculum Casey is known from Canada and Pennsylvania. 



Tribe III. OPRESINI. 



Very minute species, chiefly distinguished by the long proster- 

 num in front of the coxfe. To the tribe Casey has ascribed three 

 genera. Of these Opresus, having the eyes median, thorax im- 

 pressed at base and scutellum invisible, is represented by three 

 known species, each less than .7 of one mm. in length, which occur 

 from Pennsylvania to Georgia. Delins, differing in having the 

 scutellum distinct and the olytral suture elevated, is also repre- 

 sented by a single species of the same size in Pennsylvania; while 

 Neladivs, having the eyes in front of middle, thorax not impressed 

 at base and scutellum distinct, is also known by one species from 

 Pennsylvania. 



Tribe IV. CEPHENIINI. 



Represented by the single genus: 



V. Cephennhtm Muller. 1822. (Gr., "red or purple color.") 



Small convex species having the head triangular and strongly 

 deflexed, but slightly visible from above; antenna? widely sepa- 

 rated, their clubs 3- jointed, the joints increasing rapidly in thick- 

 ness; thorax with a feeble fovea near each hind angle; scutellum 

 distinct. 



580 (1855). Cephennium corpokosum Lee, Proc. Phil. Acad. Nat. Sci., VI, 

 1852, 150. 

 Oblong-oval, rather robust, strongly convex. Dark reddish-brown, shin- 

 ing, sparsely clothed with rather short, yellowish recurved hairs; antennae 

 and legs paler, the former one-half the length of body. Thorax nearly twice 

 as wide as long, sides broadly cun^ed ; disk convex, with a broad shallow 

 fovea near each hind angle. Elytra together not longer than wide, not 

 wider than thorax, finely and very sparsely punctate; each with a narrow, 

 deep impressed line on basal third just within the humerus and a deep basal 

 fovea near suture. I^ength 1 mm. 



