181 KA.NSAS UNIVERSITY SCIENCE BULLETIN. 



Drosophila basilaris, n, sp. 



Male and female : Head and members yellow ; front broad as 

 one eye, sides parallel, three fronto-orbitals on each side, two 

 verticals near upper angle of each eye, ocellar bristles strong, a 

 pair of small bristles behind triangle ; face excavated, median 

 carina not very prominent ; antennae two-thirds as long as the 

 face, third joint one and one-half times as long as broad, brown- 

 ish on upper margin ;, occiput blackish centrally. Thorax red- 

 dish yellow ; two approximated humeral bristles, two post- 

 humerals, one presutural, two supraalar, one postalar, and a 

 pair of prescutellar bristles ; scutellum sometimes with the tip 

 brownish and with two pairs of bristles ; pleurae with a longitu- 

 dinal brownish band, two sternopleural bristles present ; halteres 

 and legs yellow. Abdomen subopaque black, in most specimens 

 the first segment on the posterior half and the second segment 

 on the base yellowish white, in other specimens the first seg- 

 ment is wholly yellow. Wings hyaline, costa reaches tip of 

 third vein, its third section about one-half as long as its second, 

 and about one-fifth longer than the penultimate section of tlie 

 fourth vein. Length, 2.5 mm. 



Ten specimens ; April. 



Drosophila flaviseta, n. sp. 



Female : Reddish yellow, macrochsetse yellowish. Front 

 about three-fourths as wide as one eye, sides parallel, three 

 fronto-orbitals on each side, two verticals near upper angle of 

 each eye, ocellar bristles and a pair of smaller ones behind the 

 ocelli present ; face excavated and with a low median carina ; 

 antenna) but little more than half as long as the face, third 

 joint notched above ; cheeks very narrow. Thorax with one 

 humeral, two posthumeral, two presutural, two supraalar, one 

 postalar, and a pair of prescutellar bristles ; scutellum blackish 

 at apex, with four bristles ; two sternopleural bristles present. 

 Legs uniformly yellow. Abdomen yellow on basal half, and 

 shining brownish black on apical half. Wings with a brown- 

 ish tinge, most prominent between costa and third vein, a black 

 spot at tip of first vein, costa reaches tip of third vein, its third 

 section about one-half as long as its second, and slightly longer 

 than the penultimate section of the fourth vein. Length, 3 mm. 



One specimen ; February. 



