254 ASHMEAD 



From Yukon River; Nushagak River, August 14, 1882 (McKay) ; 

 Wrangell (H. F. Wickham). This species is widely distributed over 

 British Columbia, Canada and the United States. A single specimen 

 was taken at Kluchefski, Kamchatka, in 1897, ^Y ^^- L" Stejneger. 



Superfamily X. TENTHREDINOIDEA Ashmead. 



Family LYDID.E. 



Genus Itycorsia Konow. 



ITYCORSIA MARGINIVENTRIS (Cresson). 



Lyda margi7tiventris Cresson, Trans. Am. Ent. Soc, viii, p. 29, 1880. — 



Cresson, Syn. Hym. N. Am., p. 170, 1887. 

 Pamphilius marginiventris Kirby, List Hym. Brit. Mus., i, p. 345, 1882. — 



Dalla Torre, Cat. Hym., i, p. 433, 1894. 

 Lyda crediia Kincaid, Proc. Wash. Acad. Sci., 11, p. 344, 1900. 



Type in collection of the American Entomological Society. From 

 Sitka. 



Genus Cephaleia Jurine. 

 CEPHALEIA NIGROPECTA (Cresson). 



Lyda nigropectus Cresson, Trans. Am. Ent. Soc, viii, p. 32, 1880. — Cresson, 



Syn. Hym. N. Am., p. 171, 1887. 

 Pamphilius nigropectus Kirby, List Hym., Brit. Mus., I, p. 347, 1882. — 



Dalla Torre, Cat. Hym., i, p. 435, 1894. 

 f CcEtionydiis nigropectus Konow, An. K. K. Hofmus. Wien., xii, p. 254, 1897. 

 Cephaleia nigropectus Kincaid, Proc. Wash. Acad. Sci., 11, p. 344, 1900. 



Type in collection of the American Entomological Society. From 



Sitka. 



Genus Bactroceros Konow. 



BACTROCEROS SITKENSIS Kincaid. 

 Bactroceros sitkensis Kincaid, Proc. Wash. Acad. Sci., 11, p. 344, 1900. 

 Type. — Cat. No. 5280, U. S. Nat. Museum. From Sitka. 



BACTROCEROS PALACHEI sp. nov. 

 Cephaleia sp. Kincaid, Proc. Wash. Acad. Sci., 11, p. 344, 1900. 



JPemale. — Length 1 1 mm. Head rufous with a blackish spot on 

 middle of vertex enclosing the ocelli and extending as a narrow line 

 back to the occiput ; antennae broken off after the third joint, the three 

 joints remaining rufous ; the clypeus, the cheeks, the mandibles, a 

 short line along the inner margins of the lateral lobes of vertex, a 

 broader line extending from summit of eyes backwards to the occiput, 

 and a short line below it just back of the eyes, yellowish- white ; su- 



