NORTH AMERICAN HYMENOPTERA. 189 



Metathorax orange yellow, with a central black spot ; head and 

 abdomen above orange yellow, the latter with a broad, black 

 band behind middle ; central black spot at base of second 



segment very large, lateral spots minute ..... solola. 



Second abdominal segment with two large, elongate, somewhat 

 oblique spots anteriorly, confluent at base ; color of pubes- 

 cence ochraceous and black ; abdomen with a broad, black 

 band behind middle ; head entirely ochraceous. 



Sumiehrasti. 

 Second abdominal segment with one large black spot at base. 

 Metathorax pale golden, with a central black spot ...altamira. 

 Head, thorax and abdomen black, clothed with reddish golden pubes- 

 cence ; legs black, with black hairs montezumae. 



Metathorax entirely bright golden ; basal black spot on second 

 abdominal segment very large and broad ; apical margin also 



black xaliseo. 



Body black and ferruginous. 

 Head and thorax black, with erect, black and depressed silvery pubescence ; 

 apex of metathorax ferruginous, a spot on disc of metathorax 

 and sides of pleura silvery; abdomen pale ferruginous, the 



segments fringed with silvery white pubescence Ulltei. 



Head entirely black ; thorax rufo-ferruginous, with prominent lateral tu- 

 bercles; second abdominal segment black at base and rufo- 

 ferruginous at apex, beyond which is a broad pale yellowish 



band; apex of abdomen black nigrieeps. 



Head black, thorax ferruginous, apical margin of basal segment and a large, 

 oblong patch on each side of second, and its apical margin 



with yellowish white pubescence derilieta. 



Black ; head wider than thorax, vertex red, with ferruginous pubescence ; 

 second abdominal segment with two ovate spots at basal 



margin vertical!*. 



Head with pale ochraceous pubescence ; second abdominal segment with a 



large black spot of black pubescence rubrieeps. 



Head and abdomen black, thorax ferruginous ; second abdominal segment 

 with a large oblong patch of yellowish white pubescence on 



each side at its base ferruginea. 



Head blackish, thorax ferruginous ; abdomen black ; beneath, the segments 



fringed with silvery pubescence electra. 



Head and abdomen black, thorax and legs ferruginous ; second abdominal 

 segment with two ovate pubescent, pale yellow maculae. 



separata. 

 Black ; head not as wide as thorax, with rusty golden pubescence ; abdo- 

 men with black pubescence ; second abdominal segment with 

 four ochraceous maculae, fourth and fifth segments ochra- 

 ceous m 11 ii i flea . 



Head and thorax ferruginous ; abdomen black ; second segment with four 

 rather small yellow spots, two at base and two near apex. 



4 -guttata. 



