April, '08] ENTOMOLOGICAL NEWS. 175 



13. Anterior ends of the lateral stripes of the thorax curved out, 



lineata Scop. 

 Anterior end of lateral stripes not curved out Ingens Lw. 



14. Antennae for the most part black or fuscous 15. 



Antennae yellowish, darker toward the tip consularis O. S. 



15. Pleura and metanotum spotted 16. 



Pleura and metanotum without spots noblis Lw. 



16. An opaque spot on the lateral thoracic stripes . . . . nigrolutea Bell. 

 No opaque spot on the lateral thoracic stripes 17. 



17. Rostrum shining black above, yellow below usta O. S. 



Rostrum yellow mexicana Macq. 



18. Thoracic dorsum opaque 19. 



Thoracic dorsum shining 22. 



19. Stigma brown 20. 



Stigma yellowish 21. 



20. Lateral margins of the lateral thoracic stripes with three velvety- 



black spots elegantnla Will. 



Lateral thoracic stripes without black spots .... unimacnlata Lw. 



21. Antennae longer than usual uiacrocera Say. 



Antennae shorter than usual ! tennis Lw. 



22. A velvet black spot at the anterior end of the lateral thoracic stripe. 



punctum Lw. 



No velvet black spot at the anterior end of the lateral thoracic 

 stripe 23. 



23. Joints of the flagellum, except the basal ones, blackish 24. 



Joints of the flagellum in two colors 30. 



24. Occiput altogether shining 25. 



Occiput opaque, with a shining triangular spot in the middle. 



25. Cross-veins clouded nnifasciata Lw. 



Cross-veins not clouded 26. 



26. Front and occiput unicolorous sodalis Lw. 



Front and occiput with a black stripe occipitalis Lw. 



27. Thoracic suture colored with black at both ends 28. 



Thoracic suture not colored black 29. 



28. Posterior margin of the eighth sternite of the male with a rather deep 



rounded incision, the edges of which bear long yellow hairs. 



occidentals n. sp. 



Posterior margin of the eighth sternite of the male straight or nearly 

 so, yellow hairs much shorter and sparser . . ferrnginea Fabr. 



29 Stigma brownish-yellow occipitalis Lw. 



Stigma blackish-brown gracilicornis Lw. 



30. Joints of the flagellum black at the base 31. 



Joints of the flagellum yellow at the base 35. 



31. Occiput without distinctly defined shining triangle, xanthosligma Lw. 

 Occiput opaque, with a distinct shining triangle 32. 



32. Costal cell colorless, stigma dark brown abbreviata Lw. 



Costal cell colored, stigma yellowish-brown 33. 



