30 Hymenoptera in America North of Mexico 



suffusus (Cresson). Que., Maine, Mass., Conn., Ont., N. Y. Host: Jnnipenis virginiana, Thuja 

 occidentalis. 

 Lopliynis sufjusus Cresson, 1880. Amer. Ent. Soc, Trans. 8: 26. 9. 

 Monoctenus piniperinus MacGillivray, 1894. Canad. Ent. 26: 328. 9. N. syn. 



Biology: Britton, 1925. Conn. (State) Agr. Expt. Sta., Bui. 265: 336. —Brown, 1940. Canada 

 Dept. Agr., Forest Ins. Survey, 4th Ann. Rpt. for 1939, p. 18. 



Genus AUGOMONOCTENUS Rohwer 



Augomonoctenus Rohwer, 1918. Ent. Soc. Wash., Proc. 20: 81. 



Type-species: Aiigovionoctemis libocedrii Rohwer. Orig. desig. 



An exclusively North American genus, where it is found in Oregon, California, and Arizona. 

 The Arizona species is unidentified. 



libocedrii Rohwer. Oreg., Calif. Ecology: Larvae feed inside cones. Host: Libocedrus 



decurrens. 

 Augomonoctenus libocedrii Rohwer, 1918. Ent. Soc. Wash., Proc. 20: 81. 9. 



Biology: Middlekauff, 1967. Pan-Pacific Ent. 43: 272. 

 pilosus Middlekauff. Calif. (Cholame, San Luis Obispo Co.). 



Augorno7wcte7ius pilosus Middlekauff, 1967. Pan-Pacific Ent. 43: 272. 9. 



Subfamily DIPRIONINAE 



Larvae of this subfamUy feed on Pinaceae. 



Genus ZADIPRION Rohwer 



Neodiprion subg. Zadiprion Rohwer, 1918. Ent. Soc. Wash., Proc. 20: 83. 

 Type-species: Diprion grandis Rohwer. Orig. desig. 



A small genus of four or five species, two of which are found in the United States, the others 

 in Mexico. 



Revision: Middleton, 1931. Ent. Soc. Wash., Proc. 33: 165-170. -Smith, 1971. Ent. Soc. Wash., 

 Proc. 73: 187-197. 



Taxonomy: Smith, 1974. Ent. Soc. Wash., Proc. 76: 415 (key to spp.). 

 rohweri (Middleton). Colo., N. Mex., Utah, Nev., Calif. Host: Finns monophylla, P. edulis. 



Neodiprion {Zadiprion) rohweri Middleton, 1931. Ent. Soc. Wash., Proc. 33: 166. 9, cJ. 

 townsendi (Cockerell). S. Dak., Nebr., Colo., N. Mex., Ariz. Host: Pinus ponderosa. 



Lophyrus townsendi Cockerell, 1898. Ann. and Mag. Nat. Hist. (ser. 7) 2: 457. 9. 



Diprion grandis Rohwer, 1912. U. S. Natl. Mus., Proc. 43: 208. 9,6. 



Biology: Swenk, 1911. Nebr. Agr. Expt. Sta., Ann. Rpt. 24, pp. 1-33 ("bull pine sawfly"). 



Genus NEODIPRION Rohwer 



Neodiprion Rohwer, 1918. Ent. Soc. Wash., Proc. 20: 83. 

 Type-species: Lophyrus lecontei Fitch. Orig. desig. 



All species of Neodiprion are found in North America. The only Palaearctic species, N. ser- 

 tifer, was accidentally introduced. In North America, representatives of this genus are found as 

 far south as El Salvador. Neodiprion contains most of the destructive species of Diprionidae in 

 North America. Damage is caused by larval defoliation of valuable timber species in forest 

 stands, plantations, and ornamental plantings. Outbreaks occur sporadically, sometimes over ex- 

 tensive areas and result in loss of growth and occasionally tree mortality. Life cycles differ 

 between species. In general, oviposition is in the needles of the host and the larvae feed gregari- 

 ously at first but later spread out in search of new food. Feeding may be on the new or old 

 growth, or both. Mature larvae go into the ground and spin a tough, papery cocoon in which they 

 pupate. Overwintering is either as an egg in the foliage or in a cocoon in the ground, and there 

 may be from one to five generations per year depending on the species and climate. 



