294 THE CANADIAN ENTOMOLOGIST. 



and usually a spot on pleura, yellow ; scutellum black or ferruginous, or 

 with two ferruginous or yellow spots ; postscutellum usually black, some- 

 times ferruginous ; legs, except base, especially behind on middle and 

 hind pairs, ferruginous, front and middle legs more yellowish in front ; 

 abdomen except base and apical margins of segments more or less 

 ferruginous, yellow marks on segments as follows : A spot on each side 

 of 1-5, sometimes continuous, or nearly so, on 2, 4 and 5, sometimes 

 broken in two on 4, often wanting on i, 4 and 5, and a transverse spot 

 on 6. Length, 6-8 mm. 



Carlinville, Illinois ; 18 $, 26 (^ specimens. 



Nomada Illinoensis, n. sp. — % . Closely resembles female of N. 

 Sayi ; antennae shorter, joint 4 longer than 3, a little longer than 5, dis- 

 tinctly shorter than 12; scutellum a little less prominent; pygidium 

 broader, broadly rounded, not truncate, more densely and finely 

 punctured, more densely clothed with appressed pubescence ; sides of 

 face below more yellow ; abdomen with a spot on each side of segments 

 2 and 3 ; 5 with a transverse spot, usually divided, sometimes wanting. 

 Length, 6-8 mm. 



^ . — Resembles the male of N. Sayi; joint 4 of antennae shorter than 

 13. Length, 6-8 mm. 



Carlinville, Illinois ; 26 $ , 54 c? specimens. 



Noinada parva, n. sp. — ? . Resembles the female of N.Illinoensis, 

 but is a little smaller; joint 4 of antennas longer than 3, about equalling 5, 

 shorter than 12; abdomen with a yellow spot on each side of segments 

 2-5. Length, 5 mm. 



^ . — Scape stout, joint 4 of antennse longer than 3, a little 

 longer than 5, much shorter than 13, 5-8 not sub-lobate at apex 

 beneath; pygidium bifid; black, mandibles, labrum, clypeus except 

 sometimes at base, lower anterior orbits, scape in front, flagellum except 

 at base above, tubercles, tegulaj, sometimes a spot on pleura and legs in 

 front, yellow ; abdomen reddish, segments 4-6 more or less blackish ; 

 yellow markings on segments of abdomen as follows : A spot on each 

 side of 2 and 3 ; one or twp spots on each side of 4, sometimes wanting ; 

 a band on 5 narrowed or interrupted medially, and sometimes a spot on 

 each extreme side, all sometimes wanting ; a transverse spot on 6. 

 Length, 5-6 mm. 



Carlinville, Illinois ; i ? , to c? specimens. 



