Superfamily ICHNEUMONOIDEA 381 



similis (Davis). Que. w. to Alaska, s. to N. H., Nebr., Colo., and Calif. The division of this 

 species into four subspecies by Mason (1955) is rather unconvincing. 

 Diabonis similis Davis, 1897. Amer. Ent. Soc, Trans. 24: 231. 9 (d misdet.). 

 Diaborus iiebraskensis Davis, 1897. Amer. Ent. Soc, Trans. 24: 232. 6. 

 Diaborus citrifrons Ashmead, 1902. Wash. Acad. Sci., Proc. 4: 212. 6. 

 Cteniscus vitticollis Cresson, 1868. Amer. Ent. Soc, Trans. 2: 113. "6" = 9. 



Genus SCAPNETES Townes 



Scapietes Townes, 1969. Amer. Ent. Inst., Mem. 11: 190. 



Type-species: Exenterus oniatus Walsh. Orig. desig. Enigmatically, Townes (1969) 

 added the qualifying phrase "as interpreted by Mason, 1956" to his type-species 

 designation, but then went on to point out, in effect, that Mason (1956) had 

 confused two species under the name omatus. 

 ornatus (Walsh). N. S., N. B., Que., N. H., Conn., S. C, Ga., Fla., Ont., Mich. 

 Exenteron (!) omatus Walsh, 1873. Acad. Sci. St. Louis, Trans. 3: 105. S. 



Taxonomy: Mason, 1956. Canad. Jour. Zool. 34: 120-124. 

 rufus (Provancher). Que. 



Cteniscus nifus Provancher, 1876. Nat. Canad. 8: 318. 9. 



Taxonomy: Townes, 1969. Amer. Ent. Inst., Mem. 11: 190. 



Genus EXENTERUS Hartig 



Exentenis Hartig, 1837. Arch. f. Naturgesch. 1: 156. 



Type-species: Ichneumon marffinatorius Fabricius. Monotypic 

 Actenonyx Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 195. Preocc. by White, 1846. 

 Type-species: Ichneumon marginatorius Fabricius. By subsequent monotypy from 

 inclusion by Viereck, 1911. 

 Picroscopus Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 195. 



Type-species: Tryphon ictericus Gravenhorst. By subsequent monotypy from 

 inclusion by Thomson, 1883. 



Members of this genus are parasitic upon the larvae of Diprionidae. 



Revision: Cushman, 1940. U. S. Dept. A^. Misc. Pub. 354: 1-14. — Cushman, 1943. Canad. 

 Ent. 75: 169-174 (additions and corrections to 1940 revision). 



Taxonomy: Finlayson, 1963. Canad. Ent. 95: 468-488 (key to final-instar larvae). —Mason, 



1967. Canad. Ent. 95: 375-384 (egg structure specializations). 

 abruptorius (Thunberg). Que., Ont.; Eurasia. Introduced. Host: Neodiprion sertifer (Geoff.), A^. 

 lecontei (Fitch), N. pratti banksianae Roh. Dowden (1960) stated that E. abruptorius is 

 known to be established in N. J., but no specimens of abruptorius from N. J. can be 

 found in the U. S. Natl. Museum collection; lacking evidence to the contrary, I assume 

 that the N. J. record for abruptorius is based upon incorrectly identified specimens. 



Ichneumon abruptorius Thunberg, 1822; 1824. Acad. Imp. des Sci. St. Petersburg, Mem. 8: 

 279; 9: 360. d ( 9 misdet.). 



Exenterus cingulatorius Holmgren, 1857 (1855). Svenska Vetensk.-Akad. Handl. (n. f.). 1: 

 229. 9. 



Exenterus coreensis Uchida, 1930. Hokkaido Imp. Univ., Faculty Agr., Jour. 25: 270. 6,9. 



Taxonomy: Finlayson, 1960. Canad. Ent. 92: 28 (larva). 



Biology: Morris, 1937. Bui. Ent. Res. 28: 525-534. —Salt, 1941. Cambridge Phil. Soc, Biol. 

 Rev. 16: 256. —Wilkes, 1942. Ent. Soc. Ontario, Ann. Rpt. for 1941, p. 41-44. — Guryanova, 

 1972. Zool. Zhur. 51: 845-854 (Russ. with Ent. sum.). 

 adspersus Hartig. Eurasia. Introduced in N. B. in 1938 and possibly in mixture with other 



Exenterus spp. at other Canadian localities between 1933 and 1939, apparently without 

 becoming established. The target host for introductions in Canada was Gilpinia 

 hercyniae (Htg.), but I find no record of adspersus having been reared from hercyniae 



