ART. 21 ACALYPTRATE FLIES MALLOCH 17 



intradorsocentral setulae in about twelve series: posterior intra-alar 

 rather short; propleurai strong; anterior sternopleural bristle short; 

 sciitellum flattened above, slightly rounded in outline between the 

 apical bristles; prosternum with a few hairs near front margin. 

 Apical bristles on tergites quite distinct. Fore femur without an- 

 teroventral comb : mid tibia with four or five short bristles or setulae 

 on posterior side; hind femur with one or two short preapical an- 

 teroventral bristles. Inner cross vein noticeably beyond middle of 

 discal cell; last section of fourth vein about 1.5 as long as preceding 

 section. 



Length, 5 mm. 



Type. — And one paratype, Higuito, San Mateo, Costa Rica (P. 

 Schild). Cat. No. 28451," U.S.N.M. 



This species and the next are distinguislied from other unicolorous 

 yellow species of the genus by the very well developed lower postoc- 

 ular bristle or bristles, and the presence of setulae or bristles on pos- 

 terior side of mid tibia. 



MINETTIA ASSIMILIS, new species 



Male. — Very similar to the preceding species, but more distinctly 

 shining, and with both cross veins quite noticeably clouded even to 

 the unaided eye. 



The intra-alar bristle is stronger and the small bristle caudad of 

 the supra-alar is evident, the mid tibia has from two to four rather 

 long strong posterior bristles, and the size is greater. 



Length, 6-7 mm. 



Type. — Male, Cano Saddle, Gatun Lake, Panama Canal Zone, May 

 6, 1923 (R. C. Shannon). Paratype, Venezuela. Cat. No. 28452, 

 U.S.N.M._ 



A specimen from Trinidad Island has the costa a little browned 

 but is evidently the same species. 



MINETTIA TRISERIATA (Coquillctt) 



Subopaque, clay yellow. Apical three or four tergites each with 

 three small round black spots, one on median line, the others at lat- 

 eral curvature. Wings hyaline. 



Ocellar bristles minute; orbitals strong; arista very short haired. 

 Thorax with three pairs of postsutural dorsocentrals and one pair of 

 prescutellar acrostichals, the intra-alar weak but distinct. Fore fe- 

 mur without anteroventral comb. Inner cross vein at middle of dis- 

 cal cell. 



Length, 2.5 mm. 



Originally described from Nicaragua. One specimen, Higuito, 

 San Mateo, Costa Rica. 

 79G55— 2G 3 



