AMERICAN DIPTERA. 



345 



thorax longer and more cylindrical, and the anal cell not shorter 

 than the second basal. 



Chiromaiitis vocatoria Fallen. 

 Fallen, Empid., p. 12, No. 15. 



Head black. Antenna? yellow, the apex black ; the long bristle-like seta white. 

 Front white. Thorax yellow, iufuscated above. Abdomen blackish, the venter 

 pale. Legs pale, hind ones simple. Wings hyaline, the first vein short, second 

 vein lengthened, third vein reaching the wing-margin at the extreme tip, fourth 

 and fifth veins equal, forming the long discal cell, from which three veins reach 

 the margin. The hind margin is fringed and rather stout. 



This European species is given by Mr. Coquillett in Smith's 

 "List" as from New Jersey. 



SCIODRCJM1.4 Haliday. 

 Small, black, almost bare species. Antennae short, two.jointed, 

 the outer joint ovate, pointed, with a long bristle. Proboscis about 

 as long as the head, iieshy, vertical or projecting forward. Palpi 

 small, appressed to the proboscis. Eyes of both sexes nearly con- 

 tiguous below the antennae, widely separated above, the front very 

 broad. Thorax moderately large. Hypopygium of male larger 

 than the diameter of the abdomen, tip of the female abdomen blunt, 

 ciliated. Legs slender, nowhere thickened. Wings long and nar- 

 row, all the veins unforked, discal cell moderately large, sending 

 three veins to the wing-margin. Anal cell as long as the second 

 basal, its cross-vein perpendicular. Wings not projecting at the 



anal angle. 



The only important character in which the following species 

 differs from the European type is in the structure of the front, 

 which in Haliday's species is obliterated by the contiguity of the 

 eyes of the male. Seiodromia can readily be separated from its 

 near relatives by the following important characters. 



Oreothalia has the anal cross-vein parallel with the hind margin. 



Synamphotera bieolor has the proboscis incurved. 



Ardoptera has the third vein furcate and the head long and narrow. 



Seiodromia pullata sp. nov. 

 Male and Female. Length 2.5-3 mm.-Black species. Vertex, notum and 

 hypopygium covered with olivaceous brown dust, occiput, pleura-, abdomen and 

 legs with rather more cinereous dust. The narrow face dusted with whitish. 

 Arista slightly longer than the antennas. Vertex and dorsum of thorax with 

 very few short bristles, scutellum with two bristles. Hypopygium compressed, 

 vertical, twice as deep as the abdomen. Legs slender, black, not spinose or 



TEANS. AM. ENT. SOC, XXVIII. (44) SEPTEMBER, 1902 



