THE SHORT- WINGED SCAVENGER BEETLES. 



353 



j. Seventh dorsal segment of male with a small flat tubercle. 



G73. UNIGBANOSA. 



jj. Seventh dorsal segment of male simple. 674. vibginica. 



<■<■. Third joint of antennae at least one-third shorter than second. 

 * /V. Color black and yellow. 



/. Thorax as broad as elytra; form much stouter than in the 

 next, 668. flaveola. 



II. Thorax distinctly narrower than elytra ; form slender. 



669. PENNSYLVANICA. 



IcJc. Color black or piceous, the elytra often slightly paler. 

 m. Head and thorax coarsely, evenly and sparsely punctate. 



670. PUNCTATA. 



mm. Head and thorax very finely punctate. 



n. Antennae wholly piceous; legs fuscous. 671. polita. 



nn. Antennae with basal joints pale ; legs wholly pale. 



672. FESTINANS. 



bh. Abdomen narrowed or more or less pointed behind the middle. 



o. Antennae long and stout, reaching nearly to middle of elytra ; 

 thorax finely, densely but distinctly punctate ; color black. 



675. MACROCERA. 



oo. Antennae shorter and more slender, reaching only to base of elytra. 

 p. Third joint of antennae distinctly longer than second. 



q. Elytra dull yellow with a median black cloud at base ; thorax 

 not impressed. 676. sordid a. 



qq. Elytra uniform brown ; thorax with a median impression on 

 basal half. 677. laurentiana. 



pp. Third joint of antennae shorter than, or at most as long as sec- 

 ond. 



r. Apical half of abdomen piceous; thorax and elytra coarsely 

 and densely punctate. 678. luteola. 



rr. Last two joints of abdomen pale yellow ; thorax and elytra 

 finely, less densely punctate. 679. subpygm.ea. 



a a. Eyes very small, separated by three or more times their long diameters. 

 s. Front of head convex. 680. analis. 



ss. Eront of head concave. 681. cavifrons. 



662 (9503). Atheta palustbts Kiesw., Stett. Ent.. Ztg.. V, 1844, 318. 

 Elongate, rather slender. Head and abdomen black ; antennae, thorax 



and elytra piceous, finely and sparsely pubescent ; legs dusky yellow. Head 

 convex, finely and closely punctate; antennae short, stout, reaching base of 

 thorax, the second and third joints equal. Thorax about as wide as long, 

 sides rounded into base, disk finely and densely punctate. Elytra one- 

 fourth wider, one-half longer and more coarsely and distinctly punctate 

 than thorax. Length 1.8-2 mm. 



Marion and Putnam counties; scarce. March 25- April 11. 

 Taken by sifting- moist vegetable debris. 



663 (2011). Atheta dichroa Grav., Col. Micr., 1802, 186. 



Elongate, moderately robust. Black, feebly shining; legs, base of an- 

 tennae, elytra and tip of abdomen dull yellow. Antennae reaching base of 

 thorax, the third joint slightly longer than second. Thorax' nearly one- 



