ART. 21 , ACALYPTKATE FLIES MALLOCH 29 



noticeably so along costa, at apex of first vein, and on cross veins. 

 Halteres yellow. 



Eyes with minute stiff hairs; frons over one-third of the head 

 width: ocellar and postvertical bristles strong; both reclinate or- 

 bitals distinct, the anterior one about midway between posterior and 

 proclinate bristle, the latter almost at middle of frons; antennae 

 distinctly separated at base; carina large and wide, with a slight 

 median sulcus, ending a little above mouth margin; two vibrissae 

 present; cheek as high as width of the dilated palpi. Thorax nor- 

 mal, intradorsocentral setulae in about twelve series. Abdomen 

 stout. Legs normal. Wing as in figure 9. 



Length, 4 mm. 



7'?//^^.— Barro Colorado, Panama Canal Zone, Julv 16, 1923 (R. 

 C.Shannon). Cat. No. 28463 U.S.N.M. 



The only species of the genus loiown to me in which the first 

 posterior cell of the wing is distinctly narrowed at apex. 



DROSOPHILA PILIFACIES. new species 



Female. — Head testaceous A^ellow, orbits and frontal triangle gray 

 dusted, interfrontalia reddish orange, brownish along orbits; anten- 

 nae testaceous, third segment brown; labrum fuscous. Thorax sub- 

 opaque, brownish testaceous, dorsum with four broad dark vittae, 

 the submedian pair most distinct; scutellum dark brown on disk, 

 yellowish on sides; pleura largely fuscous, paler on sutures. Abdo- 

 men shining fuscous brown, yellowish on each side of each tergite 

 along anterior margins. Legs brownish yellow, femora and coxae 

 darkest. Wings brownish hyaline. Halteres with the knobs yellow. 



Ocellar bristles long, parallel; postverticals long; anterior recli- 

 nate bristle short, situated behind the proclinate bristle, the latter dis- 

 tinctly proximad of middle of frons; interfrontalia almost bare; face 

 with a well-developed central carina which is rather sharply rounded 

 above and tapered off on lower half of face, the central part of 

 latter below carina with minute erect hairs ; cheek narrow ; eyes stiff 

 haired; vibrissae duplicated. Thorax with about six series of in- 

 tradorsocentral setulae, two pairs of long dorsocentrals, and no pre- 

 scutellar acrostichals; anterior sternopleural very short. Abdomen 

 stout. Legs normal. Costa with a fine setula at apex of first vein, 

 not deeply incised there; first costal division less than one-third as 

 long as second, the latter less than twice as long as third ; inner cross 

 vein at about two-fifths from base of discal cell; fourth vein not bent 

 forward apically. 



Length, 2 mm. 



Tyije. — Higuito, San Mateo, Costa Rica (P. Schild). Cat. Xo. 

 28464. U.S.N.M. 



