208 U. S. NATIONAL MUSEUM BULLETIN 216 



Female: Black. Frontal orbit rather broadly pale yellow; facial 

 orbit black or rather narrowly pale yellow; clypeus brown, its apical 

 half paler; mandible whitish, brownish apically; palpi whitish; scape, 

 pedicel, and basal part of flagellum whitish externally; hind corner of 

 pronotum, tegula, and more or less of subtegular ridge, whitish; 

 mesopleurum, metapleurum, and propodeum often fulvoferruginous 

 with the margins black; mesono turn sometimes partly fulvoferruginous; 

 hind coxa fulvous, its extreme apex white; hind trochanters white; 

 hind femur fulvous, its apex whitish; hind tibia white, with narrow 

 subbasal and moderately narrow apical fuscous bands, the bands some- 

 what narrowed dorsally and ventrally connected by a complete or 

 incomplete infuscate stripe; hind tarsus white, narrow apex of its first 

 three segments, all of its fourth segment, and apical half of its fifth 

 segment, infuscate; front and middle legs similar in color pattern to 

 the hind legs, but much paler and the dark markings very faint or 

 obsolete; front coxa mostly white. 



Specimens: 29, Camino, Calif., June 27 and 28, 1948, H., M., G., 

 and D. Townes (Townes). 29, reared from Heterarthrus nemoratus, 

 Aurora, Maine, June 13 and 15, 1932 (Washington). 9, reared from 

 Cameraria aceriellal, Bar Harbor, Maine, Ma}^ 29, 1934 (Washington). 

 39, reared from Heterarthrus nemoratus, Bar Harbor, Maine, June 6, 

 1934, Sept. 15, 1933, and Oct. 14, 1933 (Washington). 9, reared 

 from Heterarthrus nemoratus, Bryant's Pond, Maine, May 1931 (Wash- 

 ington). 9, reared from Heterarthrus nemoratus, side of Cadillac Mt., 

 Bar Harbor, Maine, emerged June 28 to 30, 1935, A. E. Brower 

 (Townes). 9, reared from Heterarthrus nemoratus, Cherryfield, Maine, 

 June 23, 1932 (Washington). 9, reared from Heterarthrus nemoratus, 

 Eustis, Maine, June 15, 1932 (Washington). 9, reared from Heter- 

 arthrus nemoratus, Hersey, Maine, June 12, 1932 (Washington), a", 

 reared from Paraclemensia acerifoliella, Little Duck Island, Maine, 

 Aug. 6, 1931 (Washington), d", reared from Heterarthrus nemoratus, 

 Mount Desert, Maine, Sept. 16, 1932 (Washington). 9, reared from 

 Heterarthrus nemoratus, Nicatous Lake, Maine, May 1931 (Washing- 

 ton). 9, Strong, Maine, June 15, 1932 (Washington). 39, reared 

 from Heterarthrus nemoratus, Topsfield, Maine, June 2, 1930 and 

 June 6, 1932 (Washington). 9, reared from Heterarthrus nemoratus, 

 Woodstock, Maine, June 12, 1932 (Washington). 49, reared from 

 Heterarthrus nemoratus, Ashburnham, Mass. (Washington). 9, Hollis- 

 ton, Mass., August 24, N. Banks (Cambridge). 



This species has been found in the Northeastern States and in 

 California. The hosts are sawfly and lepidopterous leaf miners on 

 deciduous trees. 



