AST. 21 ACALYPTEATE FLIES MALLOCH 11 



more of the cliscal wing- veins with setulose hairs on part of tlieir 

 jpper or under surfaces. I present a key to these genera as the 

 best method ot" ehicidating their distinctions. 



KEY TO GENERA WITH SETUIiOSE VEINS 



1. Third vein bare both above aud below 2 



Third vein setulose either above or below basally 3 



2. Base of radius setulose on posterior side above basad of humeral cross 



vein ; second vein bare basad of furcation with third Setulina, new genus. 



Base of radius bare ; second vein on its upper surface with two or more 



setulae basad of its furcation with third Xenochaetina Malloch. 



?>. First and third veins setulose above ; posterior intra-alar bristle strong. 



Dryomyzoides, new genus. 

 Only the third vein setulose 4 



4. lutra-alar bristle present ; third vein setulose below on both sides of 



inner cross vein ; scutellum setulose on sides of disk. 



Neominettia, new genus. 

 Intra-alar bristle present or absent; third vein setulose at base above, 

 base below ; .scutellum without discal setulae 5 



5. Mid tibia with some very distinct posterior bristles besides those at apex ; 



intra-alar bristle present, sometimes very weak. 



Chaetominettia, new genus. 

 Mid tibia without evident median posterior bristles; intra-alar absent 6 



6. Fore femur without preapical anteroventral comb ; pteropleura bare. 



Peplomyza Haliday. 

 Fore femur with a distinct preapical anteroventral comb of short black 

 setulae; pteropleura with some fine black hairs in center. 



Eusapromyza Malloch. 



Genus CHAETOCOELIA Giglio-Tos 



A genus containing species in which the wings are deep fuscous 

 brown on the costal half or more, the hind margin having a large 

 irregular patch in second posterior cell and the border basad of apex 

 of fifth vein irregularly hyaline. Structurally there is little differ- 

 ence between the genus and Minettia, which it most nearly resem- 

 bles, about the only one consisting of small raised bases to the orbital 

 bristles and a small elevation between each antenna and eye. 



CHAETOCOELIA TRIPUNCTATA, new species 



Female. — Head and thorax fuscous brown, yellowish at bases of 

 frontal bristles; face yellowish, the usual pair of dark spots not 

 very prominent ; antennae brownish yellow ; palpi yellow. Abdomen 

 and legs clay yellow. Wings fuscous, hind margin narrowly irreg- 

 ularly hyaline basad of apex of fifth vein, the large marginal hyaline 

 mark in first posterior cell with a slender branch extending almost 

 to fourth vein just behind middle of its last section, a small round 

 hyaline spot a little above fourth vein and about one third from apex 

 of its last section, a similar spot below third vein almost in oblique 



