56 
THE ORDER OF COLEOPTERA. 
E. Head very small and retractile. Body very hard, color 
shining black Histeride. 
E E. Head moderate. Color usually dull brown, with or 
without spots Nitidulide. 
C C. Wing-cases covering the whole abdomen. 
K. Head inserted in the thorax ; thorax as broad at base 
as the abdomen. 
G. Wings not fringed with long hairs. 
H. Body moderately convex, pubescent. Antennae 
strongly clavate. 
.). Prostemum advanced beneath the retractile 
head Dermestide. 
J J. rrosternum not advanced. 
K. Body strongly pubescent, often prettily 
spotted MYCETOPH AGIDE. 
K K. Microscopically pubescent, generally un- 
spotted CRYPTOPHAGIDE. 
H H. Body very convex, or sub-globular. 
L. Medium or small insects; body thick, ovoid, 
pubescent, sometimes variegated : 
Byrriiide. 
L L. Very small insects; body glabrous, black, 
rarely spotted with red. 
M. Club of autenme 3 or 5-jointed. Body 
usually contractile into a ball : 
ANISOTOMIDE. 
M M. Club 3-jointed. Body not contractile : 
Phajlagride. 
G G. Wings fringed. Size minute. Tarsi 3-jointed: 
Trichopterigide. 
FF. Head, free. Abdomen, much wider than the ovoid 
thorax. Size very small- Soydmenide. 
Sub-tribe 2d. Sub-Clavicornes. 
A A. Body usually elongated. Antennae slightly clavate, or filiform 
andgranose. Tarsi often with less than live joints. 
N. Body somewhat depressed, smooth. Tarsi five-jointed, first 
joint very small. Color black, or dark red. .Trogositide. 
N N. Body very fiat, smooth. Color red or brown . .Cucujide. 
NNN. Body not very fiat ; sometimes cylindrical, usually deeply 
sculptured, or scabrous. Tarsi less than five-jointed. 
O. All the tarsi four-jointed Colydijde. 
O O. All the tarsi three-jointed Lathridiide. 
