CERAMBYCID^E 349 



6 Head as in Ochrozlhes but relatively smaller; antennae rather short but 

 very thick, rapidly tapering distally, the joints basally very broad, 

 strongly flattened, obtriangular, with their apices deeply and sub- 

 symmetrically emarginate and acutely bidentate, three to seven 

 subequal, thence narrower and shorter, the eleventh somewhat ap- 

 pendiculate at tip; prothorax broadly oval, nearly as wide as the 

 elytra, banded only at the sides; scutellum broad, well developed; 

 elytra as in Cyllene but with the subsutural carina almost completely 

 obsolete, the ochreous bands forming a peculiar design; legs only 

 moderate in length but notably thick throughout, the basal joint 

 of the hind tarsi barely at all compressed and not longer than the 



remainder. [Type Clytus speciosus Say] Glycobius 



Head as in Glycobius and likewise relatively small; antennae rather short, 

 moderately slender, equally thick throughout beyond the basal joint, 

 cylindric, the joints not emarginate, the subequal third and fifth 

 longer than the fourth; prothorax similarly large and transversely 

 oval, strongly convex, not ornamented; scutellum similarly large, 

 broad and rounded ; elytra usually but little wider than the prothorax, 

 tapering more or less slightly, the apices rounded or but little modi- 

 fied, the surface more convex, without trace of subsutural elevation, 

 ornamented with sharply defined yellow design in the female, the 

 maculation obsolete or barely traceable in the male; legs moderate 

 in length, often notably thick, the basal joint of the hind tarsi longer 

 than the remainder and strongly compressed; body similarly large 



in size. [Type Clytus nobilis Say] Calloides 



7 Basal joint of the hind tarsi longer than the remainder 8 



Basal joint much shorter, scarcely longer than the next two combined. . 14 

 8 Front bicarinate; antennal fossae margined above by a long acute 

 cariniform line; eyes moderate, subtruncate or less rounded beneath; 

 antennae moderate to short, rather slender, filiform to slightly 

 thickened distally, the third joint longer than the fourth or fifth; 

 prothorax rounded at the sides, feebly subconstricted at base, evenly 

 sculptured; scutellum well developed, broadly rounded; elytra not 

 or but little wider than the prothorax, generally feebly tapering, 

 obliquely truncate and sometimes unispinose at apex; anterior coxae 

 rather narrowly separated, the intermediate widely, with the meso- 

 sternum gently sloping; legs rather slender, the posterior long, the 

 femora stout (cf ) to slender (9 ); met-episterna wide. [Type Clytus 



(Xylotrechus) sartorii Chev.] Xylotrechus 



Front not bicarinate, the antennal fossae not acutely margined above.. 9 

 9 Pronotum with short transverse carinules, disposed in one or more 

 longitudinal lines or series; front more or less extended beneath the 

 eyes, the genae long; eyes moderate, subcircular, with the usual 

 eccentric emargination; antennae more or less short, slightly thick- 

 ened and compact distally; prothorax rounded at the sides, bi- 

 truncate, as wide as the elytra or very nearly; scutellum large, 

 broadly rounded; elytra even in convexity, having three or four 

 fine transverse lines of dense pale pubescence, variously disposed, 

 the apices obliquely truncate, generally unispinose; anterior coxae 

 widely separated, the sterna sloping; met-episterna wide; legs 



