ART. 11 FLIES OF THE GENUS SPATHIMEIGENIA ALDRICH 7 



With these for comparison I have identified three additional speci- 

 mens in our collection : One male, reared along with several speci- 

 mens of spinigera from N eocUfrimi lecontei Fitch taken at Reading, 

 Pa., by S. A. Rohwer; one male, Redlands, Calif., bred from Neodi- 

 prion edwardsii Norton, collected by H. E. Burke; and one female 

 from Snow Creek Crossing, Yosemite National Park, Calif., reared 

 probably from a Neodiprion by J. M. Miller. The Redlands speci- 

 men was referred to spinigera, and the Yosemite one to hylotomae^ 

 by Greene.^ 



Curran has given a full description of both sexes, but he attached 

 too much importance to the yellow jDollen of the front. The fact 

 that the material from Reading, Pa., yielded both this and spinigera 

 looks suspicious, but there seem to be two fairly tangible differences 

 when all the material of the two species is examined — the male of 

 aurifi'Ons has narrower parafacials, and both sexes have the fourth 

 abdominal segment wholly black. 



Paratype.—FQm^lQ, U.S.N.M. No. 43359. 



SPATHIMEIGENIA HYLOTOMAE Coquillett 



Admontia hylotomac Coquillett, Can. Ent., vol. 30, p. 233, 1898. — Johnson, 



Catalogue of t!ie insects of New Jersey, p. 77G, 1909. — ^Townsend, Journ. 



New York Ent. Soc, vol. 21, p. 304, 1012.— Essig, Insects of western North 



America, p. 579, 1926. 

 Eyperecteina hylotomae Smith, Proc. Ent. Soc. Washington, vol. 14, p. 123, 1912. 

 Hylotomom>jia hylotomae Townsend, lusecutor Inscitiae Menstruus, vol. 4, 



p. 31, 1916.— Geeene, Proc. Ent. Soc. Washington, vol. 23, p. 42, 1921 ; Proc. 



U. S. Nat. Mus., vol. 60, art. 10, p. 11, fig. 57, 1922.— Johnson, List of the 



Diptera of New England, p. 188, 1925. 

 Spathimeiffcnia hylotomae Cuekan, Can. Ent., vol. 62, p. 246, 1930. 



Male. — Front wider than in sjnnigera (the best two measuring 

 0.26 and 0.28 of head width), pollen of paraf rentals, parafacials, 

 cheek, and posterior orbit subsilvery ; eye more diagonal, so that the 

 lower part of the posterior orbit is wider; tip of third antennal joint 

 usually not at all jjrotruding forward; chaetotaxy as in spinigera, 

 except that there is only a single large pair of discals on each of the 

 last three abdominal segments ; calypters almost pure white ; abdomen 

 mostly shining black, with silvery basal bands on last three segments, 

 which in certain lights extend thinly over half or more of the length. 

 Fourth segment wholly black. 



Female. — Front about one-third of head width (three measured: 

 0.32, 0.32, and 0.33) ; discal bristles small but distinct, one pair to the 

 segment; abdomen with narrower basal silvery bands than in male; 

 keel usually not very prominent, the spines confined to the third seg- 

 ment, piercer as in spinigera but somewhat smaller. 



2 Proc. Ent. Soc. Washington, vol. 2.3, p. 43, 1921. 



