1873.] 



89 



[Horn. 



Anterior tibiae § with two terminal spurs albida. 



Anterior tibiae § with a single terminal spur. 



Second joint of antennae q frequently shorter than 

 the third alone. 

 First joint anterior tarsi § longer than second and 

 normal ; legs black. 



Elytra uniformly cinereo- pubescent longkollis. 



Elytra cinereo-pubescent, with two broad black 



stripes on each atrivittata. 



First joint ant. tarsi § shorter than second and 

 oblique prolonged ; legs pale. 

 Antennae with joints 2-11 § stout, conical ; ely- 

 tra luteous, finely cinereo-pubescent ochrea. 



Antennae with joints 2 and 3 § stout, 4-11 

 slender ; elytra piceous, cinereo-pubescent, 



with a fine more densely pubescent line virgulata. 



Second joint of antennae t longer than the third and 

 fourth together. 



Anterior tarsi male with one terminal spur torsa. 



B. First joint of antennae § moderately elongate, 

 never longer than the second and third together and 

 never contorted at tip. 



Second joint antennae § long, equal to third and fourth 

 together. 



Anterior tibiae § with two terminal spurs unicolor. 



Anterior tibiae £ with one terminal spur tenuis. 



Second joint antennae § not much longer than third 

 alone. 



Body cinereo to fulvo-pubescent ; winged immaculata. 



Body entirely black above. 



Body sometimes with wings well developed, usually 



feebly developed segmentata. 



M. albida, Say. Journ. Acad. Ill, p. 305 ; luteicomis, § Lee. Proc. 

 Acad. VII, p. 84. Black, densely cinereo-pubescent, varying to pale 

 ferruginous. Head black, epistoma and labrum pale luteous, a small 

 smooth space near the insertion of the antennae and a smooth median line 

 not attaining the occiput, surface densely punctulate and pubescent. An- 

 tennae and palpi pale luteous, glabrous. Thorax slightly longer than 

 wide, sides nearly parallel behind, in front arcuate and narrower to apex, 

 disc moderately convex, usually with an elongate narrow space on each 

 side clothed with black pubescence, surface densely punctate and 

 pubescent. Elytra broader than the thorax and gradually broader be- 

 hind, surface densely punctulate and pubescent, humeri with linear black 

 spot. Body beneath densely pubescent. Legs black, densely pubescent. 

 Knees outer edge of tibiae and all the tarsi with black pubescence. 

 Length .88—1.00 inch ; 22-25 mm. 

 A. p. s. — VOL. XIII. L. 



