66 Hymenoptera in America North of Mexico 



Taxonomy: Middleton, 1922. U. S. Natl. Mus., Proc. 61: 14 (larva). 

 curvarius Smith. Conn. Host: Corylus. 



Croesus curvarius Smith, 1972. Ent. Soc. Wash., Proc. 74: 175. 9, larva. 

 latitarsus Norton. Que. to Fla. w. to Alaska, B. C, Utah. Host: Betula. Dusky birch sawfly. 



CraesusV.) latitarsus Norton, 1862. Ent. Soc. Phila., Proc. 1: 199. 9. 



Biology: Jack, 1888. Psyche 5: 41. —Brown, 1940. Canad. Dept. Agr., Forest Ins. Survey 4th 

 Ann. Rpt., p. 16. —Wong, 1954. Canad. Ent. 86: 154. 

 varus (Villaret). Que. (Montreal); Europe. Introduced (?). Host: Ahius. 

 Nematus varus Villaret, 1832. Soc. Ent. France, Ann. 1: 306. 6. 



Taxonomy: Buckle, 1930. Canad. Ent. 62: 21 (record of only known specimen taken in N. 

 Amer.). 



Genus NEMATUS Panzer 



Nematus Panzer, 1801. Faune Ins. German., heft 82, pi. 10. 



Type-species: Tenthredo (Nematus) lucida Panzer. Monotypic. 

 Hypolaepus Kirby, 1882. List Hym. Brit. Mus., v. 1, p. 324. 



Type-species: Hypolaepus abbotii Kirby. Monotypic. 

 Holcocneme Konow, 1890. Deut. Ent. Ztschr., pp. 233, 238, 246. 



Type-species: Tenthredo crassa Fallen. Desig. by Rohwer, 1911. 

 Pteronidea Rohwer, 1911. U. S. Dept. Agr. Bur. Ent. Tech. Ser. 20: 98. 



Type-species: Nematus ventralis Say. Orig. desig. 



A large holarctic genus associated with various trees and shrubs. The larvae are external leaf 

 feeders. 



Revision: Marlatt, 1896. U. S. Dept. Agr., Div. Ent. Tech. Ser. 3: 44-75, 87-90. 



Taxonomy: Benson, 1962. Brit. Mus. (Nat. Hist.) Ent, Bui. 12: 404-405 (holarctic species). 



Species Group Abbotii 



abbotii (Kirby). Ont. to Ga. w. to Wis., 111. Host: Robinia. 



Hypolaepus abbotii Kirby, 1882. List Hym. Brit. Mus., v. 1, p. 324. 9. 

 crassus (Fallen). N. W. T. (Mackenzie River, Reindeer Depot); Eurasia. Host: Betula, Populus, 

 Salix, Rumex. These hosts recorded in Europe. 



Tenthredo crassa Fallen, 1808. Svenska Vetensk. Akad., Handl. 29: 106. 



Nematus sulcipes Hartig, 1840. Stettin Ent. Ztg. 1: 23. 9, 6. 



Nematus longispinis Kriechbaumer, 1885. Correspbl. Naturh. Ver. Regensburg 39: 13. 

 laticulus (Norton). N. Y. to N. C. w. to Wis., S. Dak., 111. 



Croesus laticulus Norton, 1869. Amer. Ent. Soc, Trans. 2: 368. 9. 



Neinatus procidentius Rohwer, 1912. U. S. Natl. Mus., Proc. 43: 245. 6. 



Amauronematus rufipes Marlatt, 1896. U. S. Dept. Agr., Div. Ent. Tech. Ser. 3: 78. S. 



Species Group Ventralis 



chalceus (Marlatt). Mont, Alaska, B. C, Wash. Host: SalixiO, Alnus(^). 



Ammironematus chalceus Marlatt 1896. U. S. Dept. Agr., Div. Ent Tech. Ser. 3: 84. 9. 

 erratus (MacGillivray). Maine, Man., Alaska. Host: Populus. 



Pteronidea erratus MacGillivray, 1923. N. Y. Ent Soc, Jour. 31: 170. 9. 

 exactus (MacGillivray). Maine. 



Pteronidea exactus MacGillivray, 1920. Canad. Ent. 52: 235. 6. 



Amauronematus vanus MacGillivray, 1921. N. Y. Ent. Soc, Jour. 29: 27. 9. 



Amauronematus venaticus MacGillivray, 1921. N. Y. Ent. Soc, Jour. 29: 29. 6. 

 fulvicrus Provancher. Que. to N. Y. w. to Alta., Colo. Host: Salix, Populus{i). 



Nematus fulvicrus Provancher, 1882. Nat. Canad. 13: 291. 9. 



Messa salicis Ashmead, 1890. Colo. Biol. Assoc, Bui. 1: 15. Preocc. in Nematus by 

 Linnaeus, 1758. 



Nematus salicicola Dalla Torre, 1894. Cat. Hym., v. 1, p. 257. N. name for salicis 

 Ashmead. 



Pteronidea evanida MacGillivray, 1920. Canad. Ent. 52: 233. 9,6. 



