Kahl: The Dipterous Genus Leucophenga Mik. 375 



central bristle and about the size of the prescutellar bristles, which are situated 

 nearer the scutellum than the strong posterior dorso-central, and with the distance 

 between them much closer than between either of them and its nearest posterior 

 dorso-central. The scutellar bristles strong, the apical pair decussate, the lateral 

 pair divergent and slightly longer. The posterior postalar bristle very minute; 

 the anterior supra-alar and the presutural bristles rather minute, but distinctly 

 differentiated from the setulae of mesonotum. Some of the hairs on the humeral 

 callus are longer and setula-like. All the bristles are black. 



Habitat: Bolivia, Las Juntas, Dec, 1013, icf, Coll. Jose .Steinbach. 

 Carn. Mus. Ace. 5081. Type in Carnegie Museum, Pittsburgh. 



3. Leucophenga hasemani sp. nov. 



Diagnosis: Head, antennae, and palpi yellow, t4ic latter conspic- 

 uously enlarged, compressed; upper occiput with a large, central, 

 trifid, blackish mark. Mesonotum and scu<:ellum light reddish yellow, 

 opaque, the former with a thin whitish gray bloom in certain lights. 

 Legs pale yellow. Ground-color of abdomen brownish yellow. Wings 

 yellowish hyaline with two dark brown costal spots, one near the base, 

 the other oval, lying longitudinally on apex of second vein; anterior 

 and posterior cross-veins bordered with dark brown; apex of third 

 vein and its surroundings fuscous; second vein distinctly curved at 

 apex. Length 3 mm. 



Description: Front of head opaque yellow; orbital stripes gray, in certain lights 

 grayish white, which color seems more pronounced on the orbital stripes and occllar 

 region, but immediately above the antenna; the color is almost orange-yellow. 

 Front quite broad, a little more than one-third the width of head, of equal width 

 with the face from the oral vibrissae to the upper reclinate fronto-orbital bristles. 

 Face and lunula slightly whitish, the former slightly carinate between the antennae. 

 The upper occiput gently concave, yellow, with three basally connected oblong, dark 

 brown spots, the middle one of which is a little lighter. Third antennal joint pale 

 j^ellow, hardly longer than wide; arista with its rays brown, base yellow; the rays 

 about six above and about three below. The palpi yellow, broad, compressed, 

 conspicuously enlarged, with very minute setulae below. Cheeks very narrow. 



Mesonotum and scutellum light reddish yellow, the former in front darker in 

 color; the latter paler in color and more yellowish. Scutellum very gently convex, 

 apex pale. Mesonotum in certain lights, especially in front, showing a thin whitish 

 gray bloom. Its minute black setulae, some of which in certain lights appear red- 

 dish yellow, form about eight rows between the dorso-central bristles. Humeri, 

 notopleura, and pleura paler. Legs pale yellow; tibiae with a minute pre-apical 

 bristle, or setula. Halteres yellow. 



Abdomen with a distinct black spot on each anterior corner of second dorsal 

 segment. The abdomen is in such condition that the colors cannot be satisfactorily 



