266 Hymenoptera in America Nortii of Mexico 



Type-species: Oligonenrus concolor Szepligeti. Monotypic. 

 One undescribed species occurs in North America. 



Genus PAROLIGONEURUS Muesebeck 



Paroligoneunis Muesebeck, 1931. U. S. Natl. Mus., Proc. 79 (16): 7. 



Type-species: Paroligonenrus johnsoni Muesebeck. Orig. desig. 



Taxonomy: Shenefelt, 1973. Hym. Cat., part 9, p. 681-682 (cat. World spp.). 

 johnsoni Muesebeck. Mass., N. J., S. C, Fla. Host: Neptimla sp. 



Paroligonenrus johnsoni Muesebeck, 1931. U. S. Natl. Mus., Proc. 79 (16): 8. 9. 



Subfamily BLACINAE 



The genera included here are in need of considerable study and the arrangement below is a 

 very conservative one. There are distinct differences in morphology and biologies among these 

 genera, some showing affinities with the Helconinae, others with the Agathidinae. Nearly all of 

 the North American genera are unstudied. 



Tribe BLACINI 



This tribe constitutes the least homogeneous group of genera in the Blacinae. The biologies of 

 Blacus species are not well established; van Achterberg (1976 (1975)) places this and related 

 genera as a tribe of the Helconinae. Species of Centistes, Pygostolus, and Syrhizns are internal 

 parasites of adult Coleoptera and have been placed in a separate subfamily by Capek (1969). 



Revision: van Achterberg, 1976 (1975). Tijdschr. Ent. 118: 159-323. 



Genus BLACUS Nees 

 Genus BLACUS Subgenus BLACUS Nees 



Blacus Nees, 1818. Nov. Act. Acad. Caes. Leop. Car. 9: 306. 



Type-species: Bracon hiunilis Nees. Desig. by Westwood, 1839. 

 Miocolns Foerster, 1862. Naturh. Ver. Rheinlande, Verh. 19: 237. 



Type-species: Miocolns pallipes Foerster. Orig. desig. 

 Go7iiocor))ins Foerster, 1862. Naturh. Ver. Rheinlande, Verh. 19: 254. 



Type-species: Blacus pagaiius Haliday. Orig. desig. 



Taxonomy: Shenefelt, 1969. Hym. Cat., part 4, p. 15-26 (cat. World spp.). — Haeselbarth, 1973. 

 Staatssaml. Munchen, Veroffentl. 16: 69-170 (Eur. and Cent. Asian spp.). —van 

 Achterberg, 1976 (1975). Tijdschr. Ent. 118: 174-176 (key to subgenera). 



Biology: Arnaud, 1952. Ent. News 63: 149-150 (swarming of males). 



apodastus van Achterberg. Ont. 



Blacus (Blacus) apodastus van Achterberg, 1976 (1975). Tijdschr. Ent. 118: 234. 9. 



asaphus van Achterberg. N. S., Man., Sask. 



Blacus (Blacus) asaphus van Achterberg, 1976 (1975). Tijdschr. Ent. 118: 229. 9. 

 caduceus van Achterberg. Que. s. to Ga., w. to B. C. and Oreg. 



Blacus (Blacus) caduceus van Achterberg, 1976 (1975). Tijdschr. Ent. 118: 237. 9, 6. 



cognatus van Achterberg. Wis., Sask., Ariz. 



Blac2is (Blacus) cognatus van Achterberg, 1976 (1975). Tijdschr. Ent. 118: 230. 9, 6. 



cohibilis van Achterberg. Tex. 



Blacus (Blaciis) cohibilis van Achterberg, 1976 (1975). Tijdschr. Ent. 118: 228. 9. 



defectuosus Provancher. Ont., Wis., Sask., Colo., Utah. 



Blacus defectuosus Provancher, 1886. Addit. Corr. Faune Ent. Canada Hym., p. 133. 9. 

 exilis (Nees). Que., Ont., N. Y., N. C, Iowa, 111., Wis., Colo., B. C; Europe. 



Bracon exilis Nees, 1812 (1811). Mag. Gesell. Naturf. Freunde Berlin 5: 19. 9, cJ. 



Aphidius lactucaphis Fitch, 1855 (1854). N. Y. State Agr. Soc, Trans. 14: 840. 



Miocolns pallipes Foerster, 1862. Naturh. Ver. Rheinlande, Verh. 19: 237. Preocc. in 

 Blacus by pallipes Haliday, 1835. 



