NO. 1925. STUDIES IN THE SUPERPAMILY ORYSSOTDEA—ROIIWER. 153 



ORYSSUS OCCIDENTALIS Cresson. 



Oryssus ocddentalis Cresson, Proc. Ent. Sec. Acad. Nat. Sci., Phila., 1879, p. 9; 

 Trans. Amer. Ent. Soc, vol. 8, 1880, p. 48. — Pkovancher, Addit. Corr. 

 Fauna Ent. Can. Hym., 1889, p. 27.— Dalla Torre, Cat. Hym., 1894, p. 

 379.— Bradley, Trans. Amer. Ent. Soc, vol. 27, 1901, p. 318.— Konow, 

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



The original description was as follows : 



Black, opaque; head coarsely punctured, the vertex gibbous, crowned with six or 

 seven acute tubercles encircling the lower ocellus; clypeus acutely margined at tip 

 which is truncate; cheeks very prominent; joints 3-G of antennaj more or less white 

 above; thorax depressed, densely punctured; scutellum triangular, acute at tip; wings 

 smoky beyond stigma; knees and line on outer side of tibiae, white, tarsi fulvo-testa- 

 ceous, sometimes more or less obfuscated ; abdomen shining, ferruginous, basal seg- 

 ment black, scabrous. Length 0.40 to 0.60 inch. ,? , 9 • 



Habitat — Colorado, Nevada (IMorrison). Eight specimens. 



Type. — Collection American Entomological Society. 



Bradley (1901, p. 318) says there are variable white spots between 

 the eyes. These markings probably exist only in the male. 



What has been determined as this species may be described as 

 follows : 



Female. — Length, 11 mm. Anterior margin of the clypeus rounded 

 out, crenulate laterally; face below the ocelli and posterior orbits 

 coarsely reticulate; postocellar line longer than the intraorbital; 

 lateral ocelli between the third and fourth series of tubercules but 

 nearer the third; second antennal joint less than half the length of 

 the tliird, the third longer than the fourth and fifth, fifth less than 

 half the length of the fourth, seventh longer than the eighth; meso- 

 scutum regularly punctato-reticulate; scutellum punctured, sparsely 

 so along the middle; venation strong; hypopygidium regularly nar- 

 ro\\dng toward the apex. Black; abdomen beyond the second seg- 

 ment red; apex of third, fourth, and fifth antennal joints beneath, 

 spot on dorsal apices of femora, tibise (in part) externally white; 

 tarsi rufo-piceous; wings dusky h3^aline, radial and cubital cells 

 strongly dusky; venation dark brown. (See fig. 6c.) 



South Bend, Wasiiington. One female crawling on bark of old 

 wliite spruce {Picea sitchensis) . Collected by H. E. Burke and 

 recorded under Bureau of Entomology number "Hopk. U. S. 1950c." 

 Also a female from Mount Hood, Oregon. 



ORYSSUS ABIETES, new species. 



Female. — Length, 15 mm. Anterior margin of the clypeus gently 

 rounded, depressed, slightly crenulate laterally, without a median 

 notch; front below the ocelli and posterior orbits reticulate, usually 

 uniformly so; posterior orbits not carinate although there is a gently 

 raised area where the carina is normally situated; postocellar line 

 subequal with the intraorbital line; second antennal joint less than 

 half the length of the third, third longer than the fourth and fifth, 



