ART. 21 ACALYPTRATE FLIES MALLOCH 9 



on same pin, and one female paratype, Rio de Janeiro, Brazil, 

 December 31, 1918 (R. Fischer, Deutsches Entomol. Institut.). Cat. 

 No. 28444, U.S.N.M. 



Agrees well with description of Dryoniyza advena Wiedemann, 

 but a true Sapromyzid. 



NEOMINETTIA, new genus 



Generic characters. — Third wing vein with fine widely separated 

 setulae on its underside basally; scutellum with numerous black 

 setulae on sides of disk; posterior inter-alar bristle present; costal 

 setulae not extending to apex of third vein; mid tibia without pro- 

 nounced bristles on posterior side. 



Genotype. — Musca contigua Fabricius. 



NEOMINETTIA CONTIGUA (Fabricius) 



A shining tawny yellow species with conspicuously marked wings, 

 the marlrings brown, consisting of a costal streak which extends 

 round apex of wing to fourth vein and fills the marginal cell, a cloud 

 over each cross vein, the one on inner connected with the costal 

 streak, and between it and apex two similar spots projecting from the 

 costal streak on to disk as far as third vein (fig. 20). 



Both pairs of orbital bristles strong and sloped backward ; ocellars 

 fine, shorter than postvertical pair; arista short plumose. Thorax 

 with three pairs of strong dorsocentrals and one pair of prescutellar 

 acrostichals ; a rather pronounced bristle in front of and another be- 

 hind the supra-alar. 



Length, 5.5-6.5 mm. 



Described from Brazil and subsequently recorded from Mexico. 

 I have seen it from Colima Vulcano, Mexico (L. Conrad), and 

 Higuito, San Mateo, Costa Rica (P. Schild). 



The setulose third vein and scutellum are sufficient to distinguish 

 this genus from its allies, the latter character being unique in the 

 family so far as I know at this time. No other species of the genus 

 is known to me. 



CHAETOMINETTIA, new genus 



Generic characters. — Third wing vein with a few strong setulae at 

 base on upper surface ; mid tibia with some short but distinct bristles 

 on posterior side; intra-alar bristle generally present, sometimes 

 weak; costal setulae not extending to apex of third vein; anterior 

 sternopleural bristle weak or absent. 



Genotype. — Ghaetorrdnettia spinitihia, new species. 

 79055—26 2 



