152 PROCEEDINGS OF THE NATIOXAL MUSEUM. voi,. 43. 



the ocelli and posterior orbits coarsely, irregularly reticulate; lateral 

 ocelli situated on a line drawTi between the tliird and fourth tubercules 

 postcellar line distinctly shorter than the intraorbital line; second 

 antenna! joint half as long as the third, third longer than the fourth 

 and fifth, fifth about half as long as the fourth, seventh distinctly 

 longer than the eighth; mesoscutum coarsely punctured, with two 

 longitudinal depressed areas which are more finely punctured and 

 posteriorly striato-punctate; scutellum coarsely punctato-reticulate; 

 hjrpopygidium very sharply and regularly narrowed apically, see figure 

 Qli. Black; three apical abdominal segments rufous; fourth and fifth 

 antenna! joints beneath, spot on dorsal apices of femora and tibi£e (m 

 part) exteriorly yellowish-white; wings hyaline, strongly dusky be- 

 yond the stigma (except apices of fore wings which are hyaline) ; vena- 

 tion pale brown or yellowish, costa and stigma black. 



North Cornway, New Hampsliire, June 26, 1909; Hampton, New 

 Hampshire, June 21, 1911. Collected by S. A. Shaw, New York. 



ORYSSUS MAURUS Harris. 



Oryssus maurus Harris, Kept. Ins. Mass., 1841, p. 394. — Norton, Trans. Amer. 

 Ent. Soc, vol. 2, 1869, p. 351. 



Harris, after saying that maurus was the same as sayii, described it 

 as follows : 



Female. — It is of a deep black color, rough before and smooth behind, and is marked 

 with white on the antennae and legs, like the red-tailed kind, with the addition of two, 

 shortj white lines on the forehead, between the lower corners of the eyes. The feet are 

 black. The wings have a smoky band beyond the middle, which, however, fades away 

 towards the inner margin. I have seen only females of this species, and they measure 

 from four to five tenths of an inch in length. 



New England States. 



This has usually been considered the same as saijii, but in view of 

 the uncertainty should be held as distinct. 



ORYSSUS AFFINIS Harris. 



Oryssus affinis Harris, Rept. Ins. Mass., 1841, p. 394. — Norton, Trans. Amer. 

 Ent. Soc, vol. 2, 18G9, p. 351. — Provancher, Addit. Corr. Fauna Ent. Can. 

 Hym., 1889, p. 28.— Dalla Torre, Cat. Hym., 1894, p. 379.— KoNOW, Zeit. 

 Hym. Dipt., vol. 5, 1905, p. 181 (357). 



The original description is as f oUows : 



Male. — It is possible that my Oryssus affinis, which is a male, may be the mate of the 

 foregoing dark-colored species [maurus], from which it differs in having reddish feet, 

 and in wanting the two white spots on the forehead . It measures four-tenths of an inch 

 in length. 



New England. 



Konow is wrong in saying the legs are red, as the original description 

 says feet, which is synonymous with tarsi. 



(n) Eighth antennal joint distinctly shorter than the seventh; second antennal joint 

 less than half as long as the third; abdomen red beyond the second segment. 



