ART. 9 TWO-WINGED FLIES OF TEIBE MILTOGEAMMINI ALLEN 51 



widely divergent below, with an irregular group of several bristles 

 within its angle of divergence, two bristles near middle of frontal row 

 much larger than those on either side; one to three or more proclinate 

 and about the same number of reclinate orbitals inserted irregularly on 

 that part of parafrontal devoid of pollen; vertex and upper part of 

 front thickly black setulose, pollinose part of front sparsely so; 

 antennae black, third joint seven times length of second; arista 

 thickened on basal two-fifths; parafacials densely black setulose 

 on upper half, with usual row of stout bristles extending downward 

 to level of uppermost bristle on facial ridge; in profile, buccal width 

 much greater than that of parafacials at narrowest and equals one- 

 fourth eye height, front projects for distance nearly equal to hori- 

 zontal eye diameter; palpi black, larger than the thickened part of 

 arista. Thorax gray pollinose merging with bronze on mesonotum 

 and scutellum, with four black vittae of about equal width, the inner 

 pair divergent posteriorly and terminating at transverse suture. 

 Abdomen densely gray pollinose, tinged with bronze on notum; 

 pollen of first three segments interrupted by transverse rows of two 

 to three large black spots, which on the intermediate segments 

 coalesce in the form of a letter "E," last segment polished black on 

 apical third; first two segments with strong median marginal bristles, 

 third with a strong median marginal pair and one or two pairs of 

 strong laterals which fail to complete an uninterrupted marginal 

 row, fourth with the usual marginal row. Wings subhyaline; hind 

 cross-vein oblique to section of fourth vein before the bend, parallel 

 to section beyond bend; third vein bristly more than half way to 

 small cross-vein. Fore tarsus without cinispicuous long bristly hairs 

 on the side; middle tibia with one prominant bristle on outer front 

 side beyond middle; hind tibia on outside v/ith row of about twelve 

 uneven bristles extending from base to apex. 



Female. — Not known. 



Length, 6.5 to 7.0 mm. 



Type.— Male. Cat. No. 28153, U.S.N. M. 



Range.— OvQgon, Montana, Ontario. 



Host relationships. — Unknown. 



Described from the following material: three, including the type, 

 Marshfield, Oregon, VI-27 (J. M. Aldrich) ; one, Marshfield, Oregon, 

 VI-28 (J. M. Aldrich) ; one. Summit Station, Montana, 5,200 feet, 

 VII-25 (J. M. Aldrich); all in the National Museum: one, Ottawa, 

 Ontario, 26-VII-1924 (C. PI. Curran), in the Canadian National 

 Collection. 



The male closely resembles leucocepliala in the rather striking, 

 conical-shaped head. It may be readily separated, however, by its 

 peculiar leaden pollinose front and the greater width of the frontal 

 vitta anteriorly. It may be possible that females have been placed 



