AMERICAN HYMENOPTERA. Ill 



23. M. bifasciatus. 



Allnntus bifasciatus, Say, West. Quart. Eep. II, 1823, 72, 



Norton, Bost. Jour, vii, 251, 30. 

 AUantus medius, Harris' Cat. 

 Macrophya medius, Norton, Bost. Proc. ix, 113. 

 Macrophya bifasciatus, Norton, Bost. Proe. ix, 118. 

 "Black ; tergum with a white band at base and a rufous one in the middle. 

 Length seven-twentieths of an inch. 



9. Body black, nasus white ; labrum and palpi dull whitish; tho- 

 rax with a yellow line before each wing; scutel yellowish; wangs 

 dusky; nervures brown; feet white; tips of the posterior thighs and 

 their tibiae black; tergum with a white band at base and a rufous one 

 in the middle," ("on the fourth segment. Long's Exp.") 

 Arkansas. 



Say does not mention the pale basal joint of antennae, but as this is 

 common to all the species of this class, it is to be presumed that this is 

 at least pa'le beneath. 



24. M. formosus. 



Allantm formosa, Klug, Berl. Mag. viii, 1814, 115, 82. 9 • 



AUantus hicinctus, Norton, Bost. Jour, vii, 241, 11. 9 % • 



Macrophya bicinctus, Norton, Bost. Proc. ix, 118. 

 Black : base of antennse, mouth, collar, V-spot, scutel and basal plntes yellow, 

 the f((urth and fifth segments of tergum rufous. Length 0.35 — 0.40. Br. wings 

 0.70— O.SO inch. 



9 . Body long, somewhat flattened ; antennae rather long, compressed 

 in middle, slightly serrate ; face coarsely punctured; nasus deeply ar- 

 cuate, labrum almost truncate; the basal joint of antennge, a spot be- 

 tween antennte, face beneath, tegulae, anterior angle, V-spot, scutel 

 and post scutel, basal plates, a spot on pleui-a and line from base of 

 hinder wings straw-yellow; a rufous band on third, fnirth and part of 

 fifth segments of tergum ; legs yellow, the base of posterior coxa3, apex 

 of their femora and of their tibiae and the claws black; wings smoky 

 yellowish, stigma waxen; lanceolate cell with ' short cross line or 

 closed. 



% . The rufous band on the (ergum is wanting in the male. 



V(ir. All the apical segments of the abdomen rufous beyond the 

 third. (Mass.) 



Maine, xMass., Conn., N. Y., Pa., Md., Ga., (Klug.) Florida. 



25. M. cestus. 



Alluntus cestus, Say, Bost. Jour, i, 1835, 217, 5. 



Norton, Bost. Jour, vii, 243, 13. 

 Macrophya cestus, Norton, Bost. Proc. ix, 118. 

 Black ; base of antennae, seutellum, basal plates, spot on pleura and most part 

 of legs straw colored. Length 0.36. Br. wings 0.72 inch. 



