FLIES OF THE TRIBE LESKIINI—JAMES 105 
with a continuous black vitta running from base to apex, or largely black; 
first abdominal segment without median marginals; parafacial about twice 
as wide at base of antenna as at narrowest point___ brasiliensis Townsend 
8. Black spots of abdomen small and inconspicuous, the median ones on segments 
2 and 3 usually not more than one-third length of respective segment; para- 
facial almost or quite three times as wide at base of antenna as at narrowest 
[iy Tr geotle phasis Ruste de 5) 11 [SNe Se ae a eae texensis Townsend 
Black spots of abdomen conspicuous, the median ones on segments 2 and 3 
almost reaching base of respective segment; parafacial about twice as wide 
at base of antenna as at narrowest point__--_-_ longipalpis (Van der Wulp) 
DEJEANIOPALPUS TENUIROSTRIS, new species 
Length, 7 mm. Minimum width of parafacial about two-fifths that 
at base of antennae. Vertex about two-sevenths head width. Lateral 
occipital plates blackish on upper two-fifths. Pollen of head yellow 
on parafrontals, whitish with a yellowish tinge elsewhere; pile of 
occiput concolorous with background. Antenna yellow; third segment 
with an orange cast basally, otherwise infuscated, more extensively out- 
wardly than inwardly, the infuscated area reaching almost to arista 
dorsally and about halfway to the base ventrally; length of third seg- 
ment about 0.45 head height, 0.55 length of palpus, and 2.8 length of 
second; arista yellow, becoming infuscated on its thinner portion, its 
hairs 1.5 to 2 times its maximum diameter. Proboscis chiefly yellow, 
apical half of haustellum and labella brownish; haustellum 1.5 head 
height, slender, attenuated on apical half. Palpus yellow, slender but 
as thick as the haustellum, with two outstanding apical setulae and one 
or two ventral ones on apical third; length of palpus about 0.8 head 
height. One reclinate frontoorbital. 
Thorax yellow in background, the mesonotum except broad lateral 
margins and the base of the scutellum, however, blackish ; inner meso- 
notal vitta about as wide as the trichopore of a dorsocentral bristle. 
Two presutural acrosticals; anterior presutural supraalar present but 
weak; 1 discoscutellar, set well toward apex of scutellum. Tarsi 
mainly blackish, the bases of the front and middle basitarsi, however, 
yellowish; hair of coxae and some hair at bases of femora soft, whitish, 
remaining hair of legs coarse, black. Wing with cross vein r-m oppo- 
site middle of stigma; part of vein M: beyond cubitulus distant from 
posterior margin of wing by less than half minimum width of cell Rs. 
Abdomen yellow, becoming somewhat orange-tinged toward apex; 
second segment with a rounded black spot medially on apical third 
and a small black spot at apex on each side; third segment with a tri- 
angular median black spot on the apical half; third and fourth seg- 
ments each with a prominent rounded black spot at apex on each side. 
Pile of first tergite ventrally mostly soft, whitish ; abdomen otherwise 
clothed with coarse, black hairs. Ventral aspect of tergites with a 
trace of scattered, whitish pollen. 
