60 Mr. James Edwards' Stjiiojjsis of 



57 (54). Scutellum not yellow. 



58 (o'J). Facial keels equally strong, central one 



distinct on the forehead . . . . . . 27. leptumma. 



59 (58). Central facial keel much more prominent 



than the side keels, and obsolete on the 



forehead . . . . . . . . . . 28. iuveimar<)inata. 



60 (53). Elytra not black with pale hind margin. 



61 (80). Abdomen black, or chiefly black, at least in 



the male. 



62 (79). Elytra without a dark streak at the apex of 



the clavus. 



63 (72). Scutellum black. 



64 (65). Upper notch of pygofer widely yellow .. 29. Dalei. 



65 (64). Pygofer entirely black. 



66 (71). Central facial keel equally strong throughout. 



67 (70). Teeth of anal tube long, perpendicularly 



connate. 



68 (G9). Apical angles of upper notch of pygofer 



right angles or nearly so 30. pdlucida. 



69 (68). Apical angles of upper notch of pygofer 



very obtuse . . . . . . . . 31. discolor. 



70 (67). Teeth of anal tube very small, tuberculiform 32. ohscurella. 



71 (66). Central facial keel feebler, or evanescent on 



the forehead. Apical angles of upper 



notch of pygofer acute . . . . . . 33. /orcipata. 



72 (63). Scutellum yellow or yellowish. 



73 (74). Lower margin of pygofer, when viewed from 



behind, produced into a sharp tooth . . 34. denticauda. 



74 (73). No appearance of a tooth on the lower 



margin of the pygofer, when viewed from 

 behind. 



75 (78). Hind margin of pygofer with a tooth-like 



IDrojection at its lower extremity. 



76 (77). Hind margin of pygofer straight. Abdomen 



and pygofer entirely black . . . . 35. cxigua. 



77 (76). Hind margin of pygofer angular. Abdomen 



pitchy black, hind margin of the last 

 segment broadly white. Pygofer shining 

 black 37. innignis. 



78 (75). No tooth-like projection from the lower 



extremity of the hind margin of pygofer. 

 Abdomen with pale longitudinal mark- 

 ings 38. Aubci. 



79 (62). Elytra with a dark streak at the apex of 



the clavus .. .. 3'J. atriatcUa. 



80 (61). Abdomen yellow or chiefly yellow, some- 



times with a dark lateral stripe. 



81 (84). Hind margin of pygofer with a large 



arcuate notch. 



82 (83). Inner margin of styles, when viewed from 



behind, simple 40. Fainuairei. 



