FAMILY DIOPSID.E--THE STALK-EYED FLIES 



359 



KEY TO GENERA OF THE WORLD 



1. Mesopleura not produced to form a strong spine 2 



Mesopleura produced and fomiing a strong spine similar to that on 



the hypopleura Teleopsis Rondani 



2. Mesonotum with a pair of long, black intra-alar bristles 3 



Mesonotum without intra-alar bristles Diopsis Linnaeus 



3. Scutellum longer than deep, without bristles except on the ends of the 



processes 4 



Scutellum very short, as deep as long, with a pair of erect black bristles 

 on the disc Diopsina Curran 



4. Eye-stalks little longer than wide, with a strong bristle behind each 



antenna in addition to that behind the eye Sphyracephala Say 



Eye-stalks longer, usually very long, either with a bristle near the 

 middle and far before the base of the antenna or without frontal 

 bristles, only the one behind the eye being present 5 



5. Eye-stalks short, not over three times as long as wide, without median 



bristle; steropleural spine short; bend of fifth vein without append- 

 age; anal vein continued beyond the anal cell Microdiopsis, n. g. 



Eye-stalks very long, with a median bristle; pteropleural spine long 

 and acute; bend of fifth vein with appendage; anal vein not continued 

 beyond the anal cell Diasemopsis Rondani 



Microdiopsis, new genus 



Proposed for Syhyracephala cothuniata Bigot, from the East 

 Indies. The genus differs from Sphyracephala in having longer eye- 

 stalks, with the antennae close to the eyes, no bristle on the middle of 

 the stalk, no appendage at the bend of the fifth vein. etc. 



Diopsis species. 



Diopsina ferruginea. 



