ART. 9 TWO-WIXGED FLIES OF TRIBE MILTOGFiAMMINI ALLEN 75 



short, the fourth and fifth slenderly elongate; hind tibia with out- 

 side row of about eight uneven bristles. 



Female. — Front at narrowest 0.47 of head width (measurements 

 of five 0.45, 0.47, 0.48, 0.48, 0.48) ; third antenna! joint three to four 

 times length of second. Last four joints of fore tarsus moderately 

 flattened, not reduced, and lacking tuft of long bristles. Otherwise, 

 except for usual differences of genitalia, like the male. 



Length. 7.0 to 9.5 mm. 



Type. — Male, Falls Church, Virginia, July 11, in the collection of 

 Nathan Banks. 



AUofype.—Yemixle, Cat. No. 28157, U.S.N.M., Falls Church, Vir- 

 ginia, July 21 (C. T. Greene). 



Described from the following: In the collection of the National 

 Museum; one female from Massachusetts labeled " Coc[uillett col- 

 lection"; four females from Falls Church, Virginia, July 21 (C. T. 

 Greene). In the collection of C. W. Johnson, two females from West- 

 port Factory, Massachusetts, July 31, 1913; one male from Dela- 

 ware Water Gap, New Jersey, July 13. In J. R. Malloch's collection, 

 one male and one female from Beltsville, Maryland, July 9, 1916. 

 In Nathan Banks' collection, four males and four females from Falls 

 Church, Virginia, July 4 to 25 (N. Banks), one taken feeding on 

 honeydew on tulip tree; one male and one female. Great Falls, Vir- 

 ginia, June 29 and July 8 (N. Banks). 



The present known range oi fumosa is confined to the region east 

 of the Appalachian Mountains from southern Massachusetts to 

 eastern Virginia. In the valley of the Potomac, it has been found 

 hovering low over stone-strewn roads through hilly upland forest, 

 and on honeydew-coated foliage beneath the tulip tree, Liriodendron 

 tuli'pifera. The hosts oi fumosa are not known. 



PHROSINELLA ALDRICHI, new species 



Male. — Front at narrowest 0.343 of head width (measurements of 

 three 0.33, 0.34, 0.36) ; front including vitta, all of face and bucca 

 white pollinose; vitta at level of Ipwest orbitals four times width of 

 either parafrontal; frontal row of eight to ten bristles, extending to 

 middle of second antennal joint; only a few bristly hairs on front 

 outside frontal rows; facial ridges with but one or two hairs above 

 vibrissae; antennae black, extending five-sixths the distance to 

 vibrissae, third joint four times length of second; arista thickened 

 on basal three-fifths; parafacials bare, or sometimes sparsely black 

 setulose, conspicuously narrowed at the lower corner of the eye; in 

 proiile, bucca equals one-eighth the eye height; proboscis scarcely 

 one-half the head height; palpi subclavate, yellow. Thorax gray 

 pollinose over black, witli five obscure vittac of which tlie three 

 median ones are much narrower, extending onl}- to the transverse 



