214 WILLIAM J. FOX. 



34. — Abdomen always spotted and marked- . . 35. 



Abdomen never spotted, entirely black, or red 58, 



35. — Pytjidium broad, flat, not excavated or depressed . ..36. 



Pyfjidium narrowed apically and excavated 55. 



36. — First joint of hind tarsi distinctly longer than the longer spur of hind 



tibiae . . 37. 



First joint of hind tarsi of about e(iual length to the longer spur of hind 



tibiae 54. 



37.— First cubital transverse vein received by the nuirginal cell before its middle, 

 the space between the recurrent nervure and the apes of the submar- 



ginal cell much greater than the width of the latter cell at apex 38. 



First cubital transverse vein received in about the middle of the marginal 

 cell, the space between the recurrent nervure and apex of submarginal 

 cell not or rarely greater than the width of the latter cell at apex. . . -41. 

 38. — First joint of flagelhim distinctly shorter than the second ; space between 

 hind ocelli somewhat less than that between them and the nearest eye- 

 margin ; pygidium longitudinally rugose .39. 



First joint of flagellum distinctly longer than the second ; space between 

 hind ocelli slightly greater than that between them and the nearest 



eye-margin ; pygidium coarsely punctured 40. 



39. — Pronotum with lateral tooth small and weak ; pronotum entirely, scutellum 

 and metauotum in part, yellow ; second and third ventral aljdominal 



segments spotted with yeUow cingulatlis. 



Pronotum with lateral tooth strong; pronotum with two, sinuous yellow 

 spots only ; no yellow on scutellum, metanotum, or abdomen ventrally. 



argus. 

 40. — Space between eyes at base of clypeus not as great as the width of the latter 

 in the middle ; dorsuhim finely and closely punctured, shining. 



tequalis. 



Sjiace between eyes at base of clypeus fully as great as the width of the 



latter in the middle ; dorsulum rather strongly and closely punctured, 



subopaque-.- disrretiis. 



41.— Flagellum of antennse (excluding the pedicellum) scarcely twice the length 

 of the scape, about equal to the space between the eyes on an imaginary 



line drawn across the vertex before the hind ocelli 42. 



Flagellum (excluding pedicellum) more than twice longer than scape, greater 

 in length than the space between the eyes on an imaginary line drawn 



across the vertex before the hind ocelli 45. 



42. — Head, thorax and base of abdomen with very long, shaggy, pale yellowish 

 pubescence ; middle segment coriaceous, strongly furrowed, above in the 

 middle, apparently stria.ted, though subtilely ; punctuation of head 

 feeble, the dorsulum with shallow, scattered punctures (first dor.sal seg- 

 ment maculated with yellow). ..... ... (hyreoplioriis. 



Head, thorax and base of abdomen nude, except the usual silvery jiubes- 

 cence on clypeus, thorax beneath, etc. ; middle segment above coarsely 

 sculptured ; sculpture of head and dorsulum distinct (first dorsal ab- 

 dominal segment rarely maculated with yellow) 43. 



43. — Wings except extreme apex, subhyaline ; punctuation of mesopleurje feebler 



and sx)arser than in incerfns ; scutellum rarely maculated with yellow. 44. 



Wings on apical half subfuscous : mesopleurje with large, separated, though 



