Superfamily CHALCIDOIDEA 765 



Subfamily MEGASTIGMINAE 



By E. E. Grissell 

 Genus MEGASTIGMUS Dalman 



Megastigmus Dalman, 1820. Svenska Vetensk. Akad., Handl. 41: 178. 



Type-species: Pteromalus bipunctatus Swederus. Desig. by Crosby, 1913. 

 Trogocarpiis Rondani, 1877. Soc. Ent. Ital, Bol. 9: 204. 



Type-species: Torymus ballestrerii Rondani. Monotypic. 

 Megalostigmus Schulz, 1906. Spolia Hym., p. 147. Emend. 

 Xanthosomoides Girault, 1913. Canad. Ent. 45: 220. 



Type-species: Xanthosomoides maciilatipennis Girault. Orig. desig. 

 Epimegastigrnus Girault, 1915. Queensland Mus., Mem. 4: 297, 307. 



Type-species: Xanthosomoides fulvipes Girault. Orig. desig. 



Nearctic species of this genus are phytophagous in rosaceous and coniferous seeds. Some Eu- 

 ropean species are reported to be parasitic on Cynipidae. 



Revision: Milliron, 1949. Amer. Midland Nat. 41: 257-420 (Nearctic spp.). — Boucek, 1970. 

 Ent. Gaz. 21: 265-275 (west European spp.). 



Biology: Lessmann, 1962. Ztschr. f. Angew. Ent. 49: 363-371 (immature stages). — Lessmann, 

 1962. Ztschr. f. Angew. Ent. 50: 233-241 (host plants). 

 aculeatus aculeatus (Swederus). Mass., N. Y., N. C, Ohio, III; Europe, Iran, Japan, China. 

 Host: Rosa canina, R. eglanteria, R. virginiana, R. paiustris^ 

 Pteromalus Aculeatus Swederus, 1795. Svenska Vetensk. Akad., Handl. 16: 221-222. 9. 



Taxonomy: Balduf, 1957. Ent. Soc. Amer., Ann. 50: 479-483. — Balduf, 1959. 111. Biol. Monog. 

 26: 124-130 (also biology). 

 aculeatus nigroflavus Hoffmeyer. N. J. and Pa., south to Va., west to 111.; Japan, Russia. Host: 

 Rosa eglanteria, R. gallica, R. multiflora, R. virginiana. 

 Megastigmus aculeatus var. nigroflavus Hoffmeyer, 1931. Ent. Meddel. 16: 324-326. 9, cJ. 



Biology: Balduf, 1969. 111. Biol. Monog. 26: 124-126. 

 albifrons Walker. Ariz., Calif. Host: Pinus ponderosa. 



Megastigmus albifrons Walker, 1869. Roy. Ent. Soc. London, Trans., p. 314. 6. 



Taxonomy: Burks, 1975. Brit. Mus. (Nat. Hist.) Ent., Bui. 32 (4): 151. 



Biology: Keen, 1958. U. S. Dept. Agr., Tech. Bui. 1169: 102-105. 

 amelanchieris Cushman. N. H., Vt., N. Y., Pa., W. Va., Minn. Host: Amelanchier canadensis, 

 A. laevis X humilis, A. sanguinea, Sorbus aucuparia. 

 Megastigmus amelanchieris Cushman, 1918 (1917). Ent. Soc. Wash., Proc. 19: 81. 9, S. 



Biology: Milliron, 1949. Amer. Midland Nat. 41: 363. 

 americanus Milliron. N. H., Ont., N. Y. Host: Sorbus aucuparia^ 



Megastigmus slossonae Crosby, 1913. Ent. Soc. Amer., Ann. 6: 157. 9 . Nomen nudum. 

 Megastigmus americanus Milliron, 1949. Amer. Midland Nat. 41: 285, 347, 349, 365. 9, d. 



Taxonomy: Gahan, 1951. Canad. Ent. 83: 172. 

 atedius atedius Walker. Ont., Colo., Calif.; Europe. Host: Picea engelmannii?, P. pungens, P. 

 sitchensis; Abies arizonicaL Introduced into Europe from No. America. 

 Megastigvms Atedius Walker, 1851. Ann. and Mag. Nat. Hist. 7: 214. 9. 

 Megastigmus piceae Rohwer, 1915. Canad. Ent. 47: 97-98. 9,6. 

 Megastigmus zwolferi Scheffer-Immel, 1957. Ztschr. f. Angew. Ent. 41: 52-57. 9,6. 



Taxonomy: Boucek, 1970. Ent. Gaz. 21: 265-267 (synonymy). 



Biology: Keen, 1958. U. S. Dept. Agr., Tech. Bui. 1169: 106. — Hedlin, 1973. Canad. Ent. 105: 

 118. 

 atedius montana Milliron. Mont. Host: Picea engelmannii. 



Megastigmus piceae var. m.ontana Milliron, 1949. Amer. Midland Nat. 41: 305, 347, 352. 9, 

 <J. 



