REPORT OF ENTOMOLOGIST. 
71 
Normally with only two submarginal cells; abdomen red with 
yellow bands, first segment red without a band (Mon¬ 
tana). oblifierata Cress. 
Normally with three submarginal cells. 2 
Very large and robust, over 13 mm. long, red with abundant 
yellow markings.3. 
Smaller, usually much smaller.4. 
Basal nervure considerably basad of transverse medial 
(Colo.). grandis Cress. 
Basal nervure meeting transverse medial (Colo.). magnifica Ckll. 
Mandibles bidentate . .5. 
Mandibles simple.14. 
Males. 6. 
Females.12. 
Tegulae more or less yellow; scutellum usually with yellow 
spots; abdomen with yellow bands (Colo.).lepida Cress. 
Tegulae red; scutellum black or red.7. 
Thorax red marked with black.8. 
Thorax black, with or without red spot on the scutellum.10. 
Length about 7 mm.; light markings creamy white; meta¬ 
thorax red with a central black mark. (Colo.).rubrella Ckll. 
Size larger; abdominal markings strongly yellow; metathorax 
entirely black.9. 
Third antennal joint long; second submarginal cell broad 
above. (Colo.) ..schwarzi Ckll. 
Third antennal joint shorter; second submarginal cell narrow 
above (N. M.).schwarzi contractula Ckll. 
Size larger, length 9 to 10 mm., abdomen with yellow bands. 
(Colo.).bella Cress. 
Size smaller.11. 
Abdomen with white bands. (Colo.).albofasciata Smith. 
Abdomen with yellow spots or bands. (Colo.).cuneata (Rob.) 
Larger, 10 mm. long or over. (Colo.).bella Cress. 
Smaller, 8 or 9 mm. long.13. 
Red of abdomen dark. (Colo.).cuneata (Rob.) 
Red of abdomen light. (Colo.) .lepida Cress. 
Anterior coxae strongly spined; abdomen strongly punctured.15. 
Anterior coxae not or hardly spined; abdomen usually very 
minutely or not distinctly punctured.. 35. 
Males. 16. 
Females.26. 
Apex of abdomen entire; supraclypeal mark surrounded by 
black. (N. M.).lippiae Ckll. 
Apex of abdomen notched, though sometines feebly.17. 
Flagellum with a light median area, on each side of which 
is black. 18. 
Flagellum ordinary, not so colored.21. 
Tegulae pale yellow or whitish; supraclypeal mark present.19. 
Tegulae deep ferruginous; ground-color of abdomen nearly 
all red. (Colo., Mont.).americana dacotana Ckll. 
First abdominal segment largely red, without light mark¬ 
ings. (N. MJ.sophiarum Ckll. 
First abdominal segment black or almost, with a narrowly 
interrupted cream-colored band.20 
Abdomen comparatively narrow; legs clear light red. 
(Colo.).scita Cress. 
Abdomen broad; legs darker. (Colo.).martinella Ckll. 
Metathorax with yellow marks. (Colo., N. M.).vegana (Ckll.) 
Metathorax without yellow marks.22 
Mesothorax reddish, size rather large; wings dark. (Colo.) 
.lamarensis Ckll. 
Mesothorax entirely black, size smaller. 23 
