30 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



This is the only species I have seen in which there are hairs on 

 center of face. I do not consider this character as sufficient to entitle 

 its possessor to removal from the genus DrosopMla. 



DROSOPHILA SPINICAUDA, new species 



Female. — Head pale clay yellow, upper occiput, froiis except an- 

 teriorly on sides, lower margin of cheeks, and face except carina, 

 pale brownish ; antennae pale ; palpi pale brownish. Thorax colored 

 as head, dorsum more brownish, with three dark vittae, a fuscous 

 brown mark along hind side of humeral callosity, and a black spot 

 in front of supra-alar bristle above wing base; scutellum pale brown, 

 yellow on basal lateral angles; large dark brown marks on meso- 

 pleura, sternopleura, and pteroplcura. Abdomen with hind margins 

 of tergites 1 to 4 dark brown, the dark color extending the whole 

 length of tergites in center, tapered off on sides, and not connected 

 with the dark mark on extreme lateral edges; fifth tergite with a 

 triangular dark mark on hind margin. Legs clay yellow, femora at 

 bases, and a basal and apical annulus on each tibia brownish. Wings 

 faintly browned. Halteres black. 



Head in profile as in figure 12; eyes hairy; frons widened above; 

 facial carina prominent, evenly rounded, two-thirds of the face 

 iengtli ; third antennal segment pilose. Thorax normal ; intrador- 

 socentral hairs in 8-10 series ; prescutellar acrostichals absent ; scutel- 

 lum flattened; both sternopleurals distinct. Legs normal. Second 

 costal division fully three times as long as second and over 1.5 as 

 long as third ; second vein straight to apex ; inner cross vein a little 

 over one-third from base of discal cell; outer cross vein about 1.5 

 its own length from apex of fifth vein; last section of fourth vein 

 fully 1.5 as long as preceding one; ovipositor in side view as in 

 figure 11. 



Length, 3 mm. 



Type. — Higuito, San Mateo, Costa Rica (P. Schild). Cat. No. 

 28465, U.S.N.M. 



This species is closely related to annularis Sturtevant, but differs 

 in venation, color, and in having the facial carina nonsulcate. 



DROSOPHILA NIGRICOSTA, new species 



Female. — Tawny yellow, slightly shining. Abdomen fuscous on 

 dorsum. Legs yellow. Wings hyaline, marked with fuscous as in 

 figure 10. Halteres yellow. 



Eyes sparsely haired ; frons convex ; ocellar and postvertical 

 bristles large; lower reclinate bristle small, noticeably proximad of 

 proclinate one; face with a slight carina just below bases of an- 

 tennae; cheek linear; one vibrissa only, Avhich is situated above 



