1090 



FAMILY LTI. CERAMBYCIDJE. 



KEY TO GENERA OF PHYTCECIIM. 



a. Eyes deeply emarginate but not divided; thorax cylindrical. 

 J). Antennae not pilose: form elongate, slender, cylindrical. 



c. Body aboYe nearly uniform gray; tarsal claws feebly toothed or 

 cleft LXIX. Mecas. 



cc. Body aboYe never uniform gray, usually bicolored, with small black 

 spots on thorax ; tarsal claws broadly toothed. LX X . Oeerea. 

 bh. Antennae thickly pilose with long black hairs ; form shorter, elongate- 

 oblong. LXXIII. Amphioxycha. 

 aa. Eyes completely divided, the upper and lower portions widely sepa- 

 rated ; thorax dilated or tuberculate on the sides. 

 d. Form slender ; head and thorax red, elytra black ; tarsal claws broad- 

 ly toothed. LXXI. Teteops. 



dd. Form robust ; color red with black spots ; tar- 

 sal claws cleft. LXXIL Tetbaopes. 



LXIX. Mecas Lee. 1852. 



Our members of this gemis are slender, 

 black species, clothed with gray pubescence. 

 They resemble small Saperdas, but have the 

 front short and subconvex instead of flat and 

 quadrate, and the tarsal claws cleft. Their 

 habits are. moreover, different, as they do not 

 breed in wood, but in the stems of herbs or 

 weeds. One of the five known species has 

 been taken in the State, while two others may 

 occur. 



Fi" 474. Mecas inornata Say. 

 (After Smith in Fifth Rep. U. S. 

 Ent. Comm.) 



KEY TO IXDIANA SPECIES OF MECAS. 



(7. Legs black. 



ft. Body above uniformly clothed with ash-gray pubescence; thorax 

 usually with a bare elevation each side of disk ; tarsal claws deeply 

 cleft, the inner portion broad and lobe-like. ixosxata. 

 hh. Body above sparsely clothed with ash-gray pubescence; thorax at 

 sides and middle, elytra at suture and sides more densely clothed 

 with yellowish-white pubescence; thorax without bare elevations. 



MAEGIXELLA. 



aa. Legs, or at least the femora, red; thorax with four or five slightly ele- 

 vated, bare, round spaces. -010. pebgrata. 



M. inornata Say (Fig. -174), length 8^15 mm., is recorded from 

 Cincinnati, Wisconsin and vrestward; .V. margincUa Lee., length 

 7-8 mm., is known from Illinois, Texas and Kansas. 



