720 Hymenoptera in America North of Mexico 



Basstis agilis Cresson, 1868. Amer Ent. Sec, Trans. 2: 111. 6. 



Bassus frontalis Cresson, 1868. Amer. Ent. Soc, Trans. 2: 111. 9. Preocc. by Zetterstedt, 



1838. 

 Bassus ju7ichis Provancher, 1883. Nat. Canad. 14: 10. "6" = ?. 



patei (Dasch), n. comb. Northern Colo., Alaska. 



Syrphodonus patei Dasch, 1964. Amer. Ent. Inst., Mem. 3: 207. 9. 



Genus CAMPOCRASPEDON Uchida 



Campocraspedon Uchida, 1957. Hokkaido Imp. Univ., Faculty Agr., Jour. 50: 237. 

 Type-species: Campocraspedon satoi Uchida. Monotypic and orig. desig. 



This is a small Holarctic genus. 



foutsi (Cushman). Maine, Mass., N. Y., Md., D. C, e. N. C, s.e. Ont., Ohio, e. 111. 



Syrphoctonus foutsi Cushman, 1927. U. S. Natl. Mus., Proc. 72 (13): 12. S, 9. 

 truncatus Dasch. Northern Colo., Alaska, s.e. B. C, n. Idaho. 



Campocraspedon tnincatus Dasch, 1964. Amer. Ent. Inst., Mem. 3: 214. <J, 9. 



Genus PHTHORIMA Foerster 



Phthorima Foerster, 1868. Naturh. Ver. Rheinlande, Verb. 25: 162. 



Type-species: Bassus compressus Desvignes. By subsequent monotypy from 

 inclusion by Thomson, 1890. 

 Pkthorimus Thomson, 1890. Opusc. Ent. 14: 1474. Emend. 



This is a small Holarctic genus. 



bidens (Davis). N. B. s. to Md., w. to s.w. Ont. and n. Colo. Host: Neocnemodon coxalis 

 (Curran), syrphid on hickory bark. 



Otoblastus bidens Davis, 1897. Amer. Ent. Soc, Trans. 24: 273. S. 



Phthorima snlciclypeus Cushman, 1920. U. S. Natl. Mus., Proc. 58: 265. 9. 

 compressa (Desvignes). Colo., s. Alta., interior Alaska, n. Yukon, B. C. 



Bassus compressus Desvignes, 1856. Cat. Brit. Ichn. in Brit. Mus., p. 91. 9. 



Bassus ibalioidis Kriechbaumer, 1878. Ent. Nachr. 4: 211. 9. 



Homoporus niger Morley, 1906 (1905). Ent. Soc. London, Trans. 53: 422. 6. 

 extensor Cushman. N. S. w. to s.e. B. C, s. to D. C, s.e. Tenn., and n.w. Colo. 



Phthorima extensor Cushman, 1920. U. S. Natl. Mus., Proc. 58: 264. 9 . 

 rufipleurum Dasch. N. H., Mass., Conn., N. Y., Md., Ont., Ohio, Mich., w. N. W. T. 



Phthorima rufipleurum Dasch, 1964. Amer. Ent. Inst., Mem. 3: 221. S, 9. 

 townesi Dasch. Mass., N. Y., n. W. Va., Ont., Ohio, Mich., Iowa. 



Phthorima townesi Dasch, 1964. Amer. Ent. Inst., Mem. 3: 224. 6,9. 

 sulcigena Dasch. Southeastern B. C. Known only from the holotype. 



Phthorima sulcigena Dasch, 1964. Amer. Ent. Inst., Mem. 3: 228. 6. 



Genus SYRPHOPHILUS Dasch 



Syrphophilus Dasch, 1964. Amer. Ent. Inst., Mem. 3: 59. 



Type-species: Bassus bizonarius Gravenhorst. Orig. desig. 



This is a small Holarctic genus. 



asperatus Dasch. Interior Alaska. 



Syrphophilus asperatus Dasch, 1964. Amer. Ent. Inst., Mem. 3: 71. 9. 

 bizonarius (Gravenhorst). Newfoundland (insular) w. to interior Alaska, s. to w. N. C, N. Mex., 

 and n. Calif.; Eurasia. Host: Syrphids. 

 Bassiis bizonarius Gravenhorst, 1829. Ichn. Europaea, v. 3, p. 350. 6. 

 Bassus cingulaius Holmgren, 1858 (1856). Svenska Vetensk.-Akad. Handl. (n. f.) 1: 369. S. 

 Bassus frontalis Brischke, 1871. Phys.-Oekonom. Gesell. Koenigsberg, Schr. 11: 104. <J. 



Preocc. by Zetterstedt, 1838 and Cresson, 1868. 

 Bassus saginatus Provancher, 1879. Nat. Canad. 11: 277. "9" = S. 



