404 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
6. Antennae in greater part dull ferruginous; clypeus l>lack, or with a white 
spot on each side; a white spot or a band as a rule on the posterior 
portion of the meso-episternum ; mesoscutellum slightly convex, 
sometimes flattish rujopecln rvfopecla (Norton), p. 417. 
Antennae black; clypeus white; a broad white band on the whole length 
of the meso-episternum and angulated anteriorly; mesoscutellum 
quite strongly convex rufopecta mellicoxa (Provancher), p. 419. 
7. Legs in greater part ferruginous (rarely dull yellow-ocher) 8. 
Legs not ferruginous 9. 
8. A band on the meso-episternum, posterior portion of the pectus, and sides 
of venter, white, or straw color lineala (Provancher), p. 420. 
Meso-episternum, pectus, and venter black 
leucosloma (W. F. Kirby), p. 415. 
9. Posterior tibiae entirely, and intermediate tibiae above, black 
flavomarginis (Norton), p. 412. 
Posterior and intermediate tibiae yellow, or straw color, except apical 
portions and slightly at base .... cinctitibiis cinctitihiis (Norton), p. 413. 
10. Surface along upper posterior margin of eye black, yellow or yellowish 
behind this to the posterior margin of the head; pectus, and meso- 
episternum entirely, or almost entirely, black; venter with straw-colored 
spots or blotches 11. 
Surface along upper posterior margin of eye to posterior margin of head, 
black (the black sometimes not fully developed in front) ; a broad obtuse- 
angled band on the meso-episternum, the greater posterior mesal portion 
of the pectus, and the venter to the ovipositing apparatus solidly pale 
yellow to straw-white angulifcra (Norton), p. 430. 
11. Dorsal surface of thorax beyond prescutum with yellowish spots; sterna 
of venter as a rule black; mesoscutellum slightly to moderately con- 
vex lobata maculosa Smulyan, p. 423. 
Dorsal surface of thorax beyond prescutum with no spots; sterna of venter 
as a rule more or less straw-colored; mesoscutellum usually strongly 
convex lobata lobata (Norton), p. 422. 
12. Abdominal dorsum with a transverse pale band 13. 
Abdominal dorsum not so banded 14. 
13. Front above antennae and vertex with a large black spot trilobed an- 
teriorly and somewhat less distinctly laterally; surface along upper 
posterior margin of eye black, yellow behind this to posterior margin of 
head (except very rarely); front above antennae and vertex rather 
smooth and shining; prescutum ^ith a yellow V-spot; 5th, or 5th and 6th 
terga, yellowish to light brown verticalis (Say), p. 425. 
Front above antennae and vertex with no such spot; area behind upper 
part of eye to posterior margin of head entirely black; front above 
antennae and vertex dull and roughened; prescutum black; 3d, 4th, 
and 5th terga ferruginous cogitans (Provancher), p. 459. 
14. Head in greater part black, yellow, or pale yellow (rarely with consider- 
able ferruginous); dorsal surface of thorax beyond collar black, and 
with or without pale markings 15. 
