736 Hymenoptera in America North of Mexico 



trifasciatus Walsh. 111.? 



Orthocentrus trifasciatus Walsh, 1873. Acad. Sci. St. Louis, Trans. 3: 100. 6, 9. 



Genus PICROSTIGEUS Foerstcr 



Picrostigeus Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 159. 



Type-species: Orthocentrus setiger Brischke. Desig. by Viereck, 1912, from three 

 species included by Thomson, 1897. 



This is a small Holarctic genus. Smith (1958) indicated that there are four undescribed Nearc- 

 tic species. 



Taxonomy: Smith, 1958. Rev. Subfam. Orthocentrinae Amer. No. of Mexico; unpublished Ph. 

 D. dissertation, Univ. of Wis., p. 181-192." 



Genus STENOMACRUS Foerster 



Synoplus Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 159. 



Type-species: Synoplus brevipennis Ashmead. Desig. by Viereck, 1902, from two 

 species included by Ashmead, 1902. 

 Mnesidacus Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 159. 



Type-species: Mnesidacus apicalis Ashmead. By subsequent monotypy from 

 inclusion by Ashmead, 1896. 

 Hypoleptus Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 159. 



Type-species: Hypoleptus columbianus Ashmead. By subsequent monotypy from 

 inclusion by Ashmead, 1896. 

 Deleter Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 160. 



Type-species: Deleter obscurus Davis. Desig. by Viereck, 1914, from three species 

 included by Davis, 1897. 

 Stenomacrus Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 160. 



Type-species: Orthocentrus silvaticus Holmgren. Desig. by Viereck, 1912, from 37 

 species included by Thomson, 1898. 

 Camaratops Foerster, 1868. Naturh. Ver. Rheinlande, Verh. 25: 160. 



Type-species: Neurateles ulmicola Ashmead. Desig. by Viereck, 1914, from four 

 species included by Davis, 1897. 



This is a large genus of worldwide distribution. 



Taxonomy: Townes, 1971. Amer. Ent. Inst., Mem. 17: 212-213 (syn.). 

 americanus (Ashmead). Newfoundland (Labrador) w. to B. C, s. to Md., Ill, Kans., Colo., and 

 Calif. 



Neuratelus americanus Ashmead, 1896. Amer. Ent. Soc, Trans. 23: 203. 2. 



Deleter obscurus Davis, 1897. Amer. Ent. Soc, Trans. 24: 221. 3. 

 brevipennis (Ashmead). Alaska. Ecology: Smith (1958) studied 35 females collected on flowers 

 of Senecio. 



Synoplus brevipennis Ashmead, 1902. Wash. Acad. Sci., Proc. 4: 226. ?. 



Synoplus pleuralis Ashmead, 1902. Wash. Acad. Sci., Proc. 4: 227. 9. 



Hypoleptus glacialis Ashmead, 1902. Wash. Acad. Sci., Proc. 4: 228. "<J, 9" = <?. N. syn. 

 Ashmead said: "Type. —Cat. No. 5673, ...Muir Inlet [Alaska], June 12." The only 

 specimens to be found in the U. S. Natl. Museum collection bearing type no. 5673 are 

 two conspecific males from St. Paul Isl, Alaska; one of these bears Ashmead's label 

 identifying it as a male of Hypoleptus glacialis. No specimens from Muir Inlet match 

 the original description and none bear an Ashmead label identifying them as H. 

 glacialis. 



Biology: Smith, 1958. Rev. Subfam. Orthocentrinae Amer. No. of Mexico; unpublished Ph. D. 

 dissertation, Univ. of Wis., p. 308. 

 californicus (Ashmead). Newfoundland (Labrador) w. to B. C, s. to Md., Kans., Colo., Ariz., 

 and Calif. Host: "Cecidomyia on Salix scouleriana was.flavescens." 

 Brephoctonus californicus Ashmead, 1896. Amer. Ent. Soc, Trans. 23: 202. 6. 



