ADAMS : DIPTERA AFRICANA. 183 



indistinct median carina ; cheeks and occiput slightly grayish 

 pollinose, former very narrow. Thorax yellow, pile black ; 

 mesonotum with five longitudinal, brown vittse, the central one 

 broader than the others and divided longitudinally by a hair- 

 like line, one humeral, two posthuraeral, two supraalar, one post- 

 alar and four dorsocentral bristles present; scutellum yellow, 

 with two sublateral, brownish lines, with two pairs of strong 

 bristles ; pleurae with three longitudinal brownish lines, one 

 strong and two small sternopleural bristles ; halteres yellow. 

 Abdomen yellow, each segment with a broad apical, brown bor- 

 der, which is continued ventrally, anal segment largely shining 

 black. Legs yellow, tibiae with a small, but distinct, preapical 

 bristle. Wings hyaline, a small dot at tip of each the third 

 and fourth veins, and each of the cross-veins clouded with 

 brown, costa reaches the fourth vein, third section less than 

 half as long as the second, and not as long as the penultimate 

 section of the fourth vein. Length, 3.7 mm. 

 One specimen ; April. 



Drosophila facialis, n. sp. 



Male : Head and members yellow ; front a little broader than 

 one eye, frontal triangle reaching nearly to the antenna, not 

 very definitely outlined, three fronto-orbital bristles, small 

 ocellar bristles directed forward, a pair of small postocellar 

 bristles discussate and directed backward ; third antennal joint 

 rather short, second with several bristly hairs; facial carina 

 prominent, oral margin bordered with black, vibrissae strong, 

 facial orbits and cheeks showing a grayish coat ; bristly hairs 

 of occiput black. Thorax yellow, pile black ; two posthumeral, 

 one supraalar, and a pair of prescutellar bristles ; scutellum 

 with two pairs of bristles ; one strong and one small sterno- 

 pleural bristle present. Abdomen yellow, pile black, anal 

 segment, and a small spot on lateral margins of the three pre- 

 ceding segments shining black. Legs uniformly yellow. Wings 

 hyaline, costa reaches tip of fourth vein, third section of costa 

 about one-half as long as the second, and about the length of 

 the penultimate section of the fourth vein, this in turn being a 

 little more than one-half the length of the ultimate section, 

 second and third veins slightly divergent. Length, 2.5 mm. 



One specimen ; April. 



