THE LEAF BEETLES. 1117 



i, N. N. " Cryptocephalinorura Borealis- Americas diag- 

 noses cum speciebus novis Musei Leconliani," in Journ. 

 Phil. Acad. Nat. Sci., I, 1849, 245-2G5. 



tin/}'ria>i, E. "Monographic uiul Kritsche-; Yer/eiclmiss der 

 Nordamerikanischen Cryptocephali, " in Linnea Entomlo- 

 gica VI, 1852, 1!)S-::iX; VII, 1855, 1-2:58; XII, 1858, 34:5- 

 409. 



LcContc. "Contributions to the Coleoptera of the United 

 States," in Trans. Amer. Hut. Soc., VIII, 1880, 195-209. 



KEY TO <;K]\'KKA OF CRYPTOCKIMIALIM. 



. Tarsal claws simple: larger. .". or more nun. ; surface sculpture rougher. 



b. Thorax not margined hut creuulate at base; front femora not evi- 



dently stouter than hind ones. 



c. Front edge of tlank of Ihorax. beneath the antenna', toothed or 



sinuate. XIII. RASSAREUS. 



<<. Front edge of flanks of tliorax straight. XIV. CRYPTOCEPHALI' s. 



bb. Tliorax margined at base, not creuulate: front feinoi'a distinctly 



stouter than hind ones. 



il. Pr. sternum tlat in fn.nt, de]:ic->c(l liehind. X\ r . (jRiui'Rii s. 



ihl. Prosternum feebly channeled: rows of punctures of elytra usually 



much confused. XVI. PACIIYIIRACHYS. 



. Tarsal claws appendiculate. /. c., with a sijuare dilatation at base; 



smaller, less than !'.."> mm. ( excepl in M<;II in-hit* ) : surface much 



smoother. 



c. Prosternum wider than long; form robust, rounded; antenn;e stout, 



rather short. XVII. MONACIIIS. 



cc. Prosternum longer than wide; form more elongate, cylindrical or 



oval. 

 /. Antennal joints (J to 11 wider; form cylindrical. 



XVIII. DlACHUS. 



//. Antennal joints 7 to 11 wider: form oval, convex. 



XIX. TRIACHUS. 



XIII. BASSAKEI-S Hald. 1849. (Gr., "a fox.") 



The members of this genus are separated from those of Crijpto- 

 ceplialux, which they most closely resemble, by the character given 

 in key. The males have the prosternum armed at middle with a 

 large, erect com | Hissed process; first ventral with a large flat plate 

 at middle, the hiiid angles of which rise into acute processes or 

 spines; fifth ventral broadly concave, with a crest of curved erect 

 hairs each side of middle. Female with I'ovea of fifth ventral large, 

 deep and circular. The following species and varieties have been 

 taken or should occur in the State. 



