44 Hymenoptera in America North of Mexico 



Caenoneura dahlhomi Thomson, 1870. Opusc. Ent., 2nd Fasc, p. 271. 5. 



Subfamily DOLERINAE 



The two genera in this subfamily are both widespread throughout the subarctic and tem- 

 perate regions of the Northern Hemisphere; one species is known from Uganda. Dolerus con- 

 tains about 125 and Lodenis about 16 world species. Larvae feed on horsetails, grasses, sedges, 

 and rushes. A few species may be of importance when feeding in cultivated crops. Adults fly 

 early in the spring and are found in their host-plant communities, on nearby flowers such as 

 those of Crataegus and Prunus, or on willow catkins. Some may feed on the sap of sugar maple. 

 There is normally a single generation a year, and mature larvae overwinter in an earthen cell in 

 the ground. Species of this subfamily can be collected in large numbers. The time of emergence 

 of the adults can be accurately predicted, yet, very little biological work has been done. Larvae 

 for so few species have been associated that it is impossible to identify them beyond genus. 



Revision: Ross, 1931. 111. Biol. Monog. 12(3): 1-116. 



Taxonomy: Ross, 1935. Ent. Soc. Wash., Proc. 37: 88-93. —Benson, 1956. Roy. Ent. Soc. 

 London, Proc, Ser. B: Taxonomy 25: 55-63. —Benson, 1962. Brit. Mus. (Nat. Hist.) Ent., 

 Bui. 12: 388-389 (holarctic species). 



Genus DOLERUS Panzer 



Dolerus Jurine, 1801 (May). Intell. Blatt. Litt.-Ztg. Erlangen, v. 1, p. 163. Suppressed by 

 Internatl. Comm. Zool. Nomencl. Op. 135, 1939. 



Type-species: Tenthredo gonager Fabricius. Desig. by Latreille, 1810. 

 Dolerus Panzer, 1801 (September). Faunae Ins. German., heft 82, pi. 11. 



Type-species: Dolenis pedestris Panzer. Monotypic. 

 Dosytheus Leach, 1817. Zool. Misc., v. 3, p. 127. 



Type-species: Tenthredo eglanteriae Fabricius. Desig. by Brulle, 1846. 



Species Group Unicolor 



asper Zaddach. Mass., Conn., Mich., Ind., S. Dak., Alaska; Europe, Siberia. Host: Cyperaceae 

 and Gramineae. 



Dolerus asper Zaddach, 1859. Programm Friedr. Col. Konigsberg, p. 21. 6. 



Dolerus tectus MacGillivray, 1914. Canad. Ent. 66: 104. 9, i. 



Dolerus asper 7negapteroides Muche, 1964. Reichenbachia 4: 31-33. 9 (male misdet.). 

 borealis MacGillivray. Idaho, Wash., Oreg. 



Dolenis borealis MacGillivray, 1893. Canad. Ent. 25: 238. 9. 



Dolerus nominatus MacGillivray, 1923. Insecutor Inscitiae Menstruus 11: 34. 9. 

 illini Ross. Mass., N. Y. w. to Alta., S. Dak., Colo. Ecology: Adults collected in Equisetum, 

 Eleocharis, and Carex habitats. 



Dolerus illini Ross, 1931. 111. Biol. Monog. 12(3): 39. 9, 6. 



Dolerus illini var. rufilobus Ross, 1931. 111. Biol. Monog. 12(3): 41. 6. 



nativus MacGillivray. Colo., Oreg. 



Dolerus nativus MacGillivray, 1923. Insecutor Inscitiae Menstruus 11: 32. 6. 



Dolerus nectareus MacGillivray, 1923. Insecutor Inscitiae Menstruus 11: 33. 6. 

 neocoilaris narratus MacGillivray. B. C, Idaho, Wash., Oreg. 



Dolerus narratus MacGillivray, 1923. Canad. Ent. 55: 65. 9, 6. 



Dolerus nocuus MacGillivray, 1923. Insecutor Inscitiae Menstruus 11: 34. 9. 

 neocoilaris neocoilaris MacGillivray. Que., N. Y. w. to Mont., Nebr., Colo. 



Dolerus neocoilaris MacGilHvray, 1908. Canad. Ent. 40: 127. 9,6. 



Dolerus refugus MacGillivray, 1908. Canad. Ent. 40: 127. 9. 

 nitens Zaddach. N. H. to Md., w. to Mich., Ohio, III., Wash., Oreg.; Europe. Ecology: Probably 

 grasses and sedges are hosts; adults sometimes swept from cultivated grass crops. Host: 

 Fesiuca sp. 



Dolerus coracimis Stephens, 1835. Illus. Brit. Ent., v. 7, p. 87. Preocc. by Klug, 1814. 



Dolerus nitens Zaddach, 1859. Programm Friedr. Col. Konigsberg, p. 16. 9, 6. 



Dolerus anthracinus Thomson, 1871. Hym. Scand., v. 1, p. 291. Preocc. by Klug, 1814. 



Dolerus varispinus Konow, 1884. Deut. Ent. Ztschr. 28: 344. Preocc. by Hartig, 1837. 



