AMERICAN DIPTEKA. 371 



scutellar bristles. Abdomen black, nowhere bristly. Legs pale yellow, the tarsi 

 sometimes brownish, hind tibiae very distinctly ciliated and with a single weak 

 spur, as have also the middle pair. On the inner side at apex, the posterior pair 

 have several transverse rows of short black bristles. Wings yellowish hyaline, 

 the costal vein reaching distinctly beyond the middle of the wing and with very 

 short cilia ; first vein ending a little closer to the tip of the second than to the 

 humeral cross-vein; fourth vein evenly arcuate, fifth vein sinuate as is also the 

 sixth; seventh vein present. Halteres yellowish, blackened at the tips. 



The original types from Wood's Hole, Mass., are before me. 



This species can easily be recognized by the peculiar form of the 

 proboscis in the female. The shiny black head and thorax and 

 contrasting light yellow legs are also quite characteristic. 



Aphiochseta pulicaria Fallen. (Plate viii, fig. 45.) 



Fallen, Dipt. Suec, Phytomyzides, 7, 6. 



Meigen, Syst. Beschr., vi. 217, 16. 



Zetterstedt, Ins. Lapp., 754, 4. 



Schiner, Fauna Austriaca, 11, 341. 



Strohl, Phoriden Oesterreichs, 202. 



Becker, Monog. Phorida?, 62. 

 Male. —Head, thorax and abdomen black, sometimes slightly brownish. Thorax 

 covered with short brownish pubescence; hut little shining; with a single pair of 

 dorsocentral macrochaetae and two marginal scutellar bristles. Third antennal 

 joint of medium size, with pubescent arista. Palpi yellow or reddish brown, 

 halteres yellow or yellowish brown. Abdomen dull black, sometimes brownish. 

 Legs varying from yellowish to dark brown ; hind femora rather wide and dark- 

 ened toward the tips; hind tibiae with a black line above, very delicately ciliated. 

 Wings often slightly tinged with brown, the veins brown ; costal vein reaching 

 to the middle of the wing, with long and well separated bristles; tip of first vein 

 about one and one-half times as far from the humeral cross-vein as from the tip 

 of the third. 



There is a large number of specimens before me which agree well 

 with European specimens from Strobl and with Becker's description 

 of this species. Very often the body is brownish and the wings 

 clear hyaline, but all seem undoubtedly to belong to this species. 



The species is very widely distributed in Europe, Siberia, North- 

 ern Africa and the following localities in the United States: Mas- 

 sachusetts, Louisiana, South Dakota, Idaho and California. It is 

 therefore practically circumpolar in its distribution. 



Apliiochrcta catn M. et B. 



Melander and Bines, Biological Bulletin, v, 16 (1903). 



Male, and Female. Length .8 — 1.2 mm.— Head black, front short, as about as 



wide as long, subshining, faintly gray pollinose in tbe male, two anterior bristles 



proclinate, the others all present and arranged as usual. Antennae wholly black 



in the male, in which sex the third joint is enlarged and ovate so as to be very 



TRANS. AM. ENT. SOC. XXIX. DECEMBER. 1903 



