138 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



the lower two curved inward; orbits and anterior margin of center 

 stripe with numerous rather long hairs; head in profile as figure 18, 

 Plate 5; antennse, arista, proboscis, and palpi black, apex of pro- 

 boscis yellowish; the pHosity on antennas very distinct, arista dis- 

 tiQctly hauy, palpi hairy; eye facets exceptionally large; occiput 

 very narrow above. Mesonotum shining, two pairs of dorso-centrals 

 present, the pair of bristles between the posterior pair hardly distin- 

 guishable from the discal setulse; pleurae glossy black-brown; scutel- 

 lum colored as disk of mesonotum, the basal pair of bristles haK as 

 large as the apical pair. Abdomen shining black; surface of seg- 

 ments with numerous hairs. Legs yellow, all coxsb, femora except 

 extreme bases and apices, and the mid and hind tibiae on middle 

 broadly blackened; all legs with rather distmct hairs. Wings vitre- 

 ous ; costa distmctly haired ; veins 2-3 convergent on outer portions, 

 3-4 divergent; third vein ending in wing tip; outer cross vein at 

 about its own length from end of fifth vein; penultimate section of 

 fourth vein two-fifths as long as last section. Halteres yellow. 



Length. — 1 mm. 



Type.-<^&t. No. 15746, U.S.N.M. 



Locality. — Plummers Island, Maryland, August 10, 1912 (W. L. 



PHYLLOMYZA APPROXIMATA, new species. 

 Plate 5, fig. 19. 



Two females, one taken in Washington, District of Columbia, June 

 4, 1912, by the same collector, and another, "D. C," coll. Coquillett? 

 May, which I consider belong to a different species, differ in having 

 the profile of head as in figure 19, Plate 5; in havmg the outer cross 

 vein at nearly three times its own length from end of fifth vein, the 

 inner and outer cross veins of nearly equal length; and the last sec- 

 tion of fourth vein about five times as long as the penultimate section. 



It is very seldom that such differences as are here noted are found 

 in the sexes of the same species, and though in this genus the ten- 

 dency to sexual difference is considerable I consider it the better 

 course to adopt the male as the type of Mrtipalpis, and give to the 

 females the species name approximata. 



Type.—Csit. No. 15751, U.S.N.M 



I have, since writing the above, seen two females of this species 

 taken at Plummers Island, Maryland, by W. L. McAtee. 



Williston's* description of Phyllomyza magnipalpis is as follows: 



Phyllomyza magnipalpis, u. sp. 



Female.— Re&d deep black. Front broad, large, the narrow orbits, on which 

 are placed the lateral rows of bristles, subshining. Third antennal joint very large, 



I Trans. Ent. Soc. Lond., 1896, p. 443. 



