56 THE ORDER OP COLEOPTiERA. 



' E. Head very small and retractile. iBody very hard, color 



sliining black Histerid^. 



E E. Head moderate. Color usually dull brown, with or 



without spots NlTIDULID^. 



C C. Wing-cases covering the whole abdomen. 



F. Head inserted in the thorax ; thorax as broad at base 

 as the al)(lomen. 

 G. Wings not fringed with long hairs. 



H. l)0dy moderately convex, pubescent. Antennae 

 strongly clavate. 

 J. Prosternum advanced beneath the retractile 



head Dbrmkstid.*:. 



J J. Prosternum not advanced. 



K. Body strongly pubescent, often ])rettily 

 spotted Mycetophagid^. 



K K. Microscopically pubescent, generally un- 

 spotted CRYPI OPHAGrlD^. 



H H. Body very convex, or sub-globular. 



L. Medium or small insects j body thick, ovoid, 

 pubescent, sometimes variegated : 



Byrrhid^. 

 L L. Very small insects 5 body glabrous, black, 

 rarely spotted with red. 

 M. Club of antennte 3 or 5-jointed, Body 

 usually contractile into a ball : 



Anisotomid^. 

 M M. Club 3-jointed. Body not contractile : 



Phalacrid^. 



G G. Wings fringed. Size minute. Tarsi 3-jointed : 



Trichopterioid^. 



F F. Head, free. Abdomen, much wider than the ovoid 



thorax. Size very small Scydm^ntd^. 



Sub-tribe 2d. Sub-Clavicornes. 



A A. Body usually elongated. Antennie slightly clavate, or filiforiu 



and granose. Tarsi often with less than five joints. 



N. Body somewhat depressed, smooth. Tarsi five-jointed, first 



joint very small. Color black, or dark red. .TRoaosiTiD^. 



N N. Body verj^ Hat, smooth. Color red or brown .. Cucujid^. 



N N N. Body not very fiat ; sometimes cylindrical, usually deeply 



sculptured, or scabrous. Tarsi less than five-jointed. 



O. All the tarsi four-jointed .• Colydiid^. 



O O. All the tarsi three-jointed Lathridiid^. 



