648 Hymenoptera in America North of Mexico 



1154-1155. —Butler and Ritchie, 1967. Jour. Econ. Ent. 60: 1239-1241. — M'Sadda, 1967. 

 Rev. Zool. Agr. et Appl. 66: 13. —Salt and van den Bosch, 1967. Jour. Invert. Pathol. 9: 

 164-177. — Brunson and Coles, 1968. U. S. Dept. Agr., Prod. Res. Rpt. 101: 3, 8. —Horn, 

 1969. Jour. Econ. Ent. 61: 1469-1470. —Foster and Bishop, 1970. Idaho Agr. Expt. Sta., 

 Res. Bui. 78: 2-20. —Richardson, Nelson, York, and Gyrisco, 1972 (1971). Canad. Ent. 103: 

 1653-1658. — Arbrust, DeWitt, and Roberts, 1972. Environmental Ent. 1: 391-393. —Miller, 

 Smith, and White, 1972. Environmental Ent. 1: 471-473. —Cross and Simpson, 1972. 

 Environmental Ent. 1: 631-633 (cocoon construction). — Casagrande, 1973. Canad. Ent. 105: 

 1119-1128. —Miller and White, 1973. Ga. Ent. Soc, Jour. 8: 233-236. — Duodu and Davis, 

 1974. Environmental Ent. 3: 396-398, 549-552, 705-710. — Walstrom, 1974. Jour. Econ. Ent. 

 67: 309-310. — Hower, 1974. Jour. Agr. Sci. 21: 2-3. —Pike and Burkhardt, 1974. Kans. Ent. 

 Soc, Jour. 47: 405-411. —Gibson and Berberet, 1974. Ent. Soc. Amer., Ann. 67: 588-590. 

 —Puttier, 1974. Environmental Ent. 3: 881-882. —Davis, 1974. Environmental Ent. 3: 

 1031-1032. -Parrish, 1974. Forage Insect Res. Conf., Proc. 17: 18-19. — Flessel, 1975. Jour. 

 Econ. Ent. 68: 585-586. —Arbrust, 1975. Environmental Ent. 4: 931-934. —Berberet and 

 Gisbon, 1976. Ent. Soc. Amer., Ann. 69: 205-208. — Dysart and Day, 1976. U. S. Dept. Agr., 

 Prod. Res. Rpt. 167: 2-3, 46-47. — Bartell, Sanborn, and Wood, 1976. Environmental Ent. 5: 

 659-661. — Eklund and Simpson, 1977. Environmental Ent. 6: 69-71. 

 exiguus (Gravenhorst). Que. w. to s. B. C, s. to s. Va., central Mo., and central Oreg.; Europe. 

 Adventive. Host: Hypera nigrirostris (F.), H. p^inctata (F.), H. rumicus (L.). This 

 species apparently became established in North America along with one of the 

 accidentally introduced hosts (most Ukely H. nigrirostris), but the oldest North 

 American record known to me for exiguus is that for one of Viereck's paratypes of the 

 synonym phytonomi. It was collected in Prince Edward Co., Ont. in 1890, and although 

 I have not seen the specimen, I have little reason to doubt that it is a specimen of 

 exiguus because there are a number of exiguus specimens in the U. S. Natl. Museum 

 collection which were collected at Toronto, Ont. in 1896. The oldest United States record 

 known to me is that for Viereck's paratype of the synonym etemankiakorum, which he 

 collected in New Haven, Conn, in 1904 and which is in the U. S. National Museum 

 collection. The oldest record known to me for western North America is 1918 (Puyallup, 

 Wash.; June 15; L. P. Rockwood). The entry of B. exiguus into western North America 

 may have been independent of its establishment in the East, because the adventive 

 thelytokous European species of Gelis studied by Caldwell and Wilson (1975), as a 

 parasite of B. curculionis in Indiana, was reared from B. exiguus in northwestern Oreg. 

 (Forest Grove and Seaside) in 1928 (cf. Rockwood, 1920); I have not seen specimens of it 

 collected in eastern North America before 1957. Dr. K. W. R. Zwart told me (personal 

 commun., 1976) that this species of Gelis is apparently undescribed. 

 Campoplex stibcinctus Gravenhorst, 1829. Ichn. Europaea, v. 3, p. 494. 9. 

 Campoplex exiguus Gravenhorst, 1829. Ichn. Europaea, v. 3, p. 499. 9 . 

 Campoplex (Bathyplectes) etemankiakorum Viereck, 1917 (1916). Conn. State Geol. and 



Nat. Hist. Survey Bui. 22: 263. i. 

 Bathyplectes phytonomi Viereck, 1925; 1926. Canad. Ent. 57 (9): 225 (key); 58 (9): 222. i, 

 9 . In the 1926 part of Viereck's paper as "Campoplex (Bathyplectes) phytonomi" (see 

 discussion under bryanti). 



Taxonomy: Horstmann, 1974. Ent. Germ. 1: 62, 73, 75. 



Biology: Rockwood, 1920. Canad. Ent. 52: 39. — Detweiler, 1923. Cornell Univ. Agr. Expt. 

 Sta., Bui. 420: 19. — Chamberlin, 1933. Ent. Soc. Wash., Proc. 35: 106. — Sechriest and 

 Treece, 1963. Ohio Agr. Expt. Sta., Res. Bui. 956: 23. —Caldwell and Wilson, 1975. 

 Environmental Ent. 4: 333-336 (Gelis). 

 sessilis (Provancher), revised status. Que. In 1974 I studied the holotype (see Barron, 1975) 

 and found that sessilis had been incorrectly suppressed as a synonym of exiguus by 

 Townes (1945). 

 Limneria sessilis Provancher, 1875. Nat. Canad. 7: 148. 9. 



Taxonomy: Townes, 1945. Amer. Ent. Soc, Mem. 11: 612. —Barron, 1975. Nat. Canad. 102: 

 566. 



