772 LIST OF DIPTERA. 



21. Leptogaster gracillimus. 



Mas. Niger ; antenna, proboscis et thoracis macula fulvescentia ; 

 pectus testaceum, vittis duabus obliquis nigris ; abdomen gra- 

 cillimum segmentis basi fulvis; pedes anteriores testacei, 

 femoribus nigra vittatis, tibiis fusco vittatis ; postici nigri, 

 femoribus tibiisque fulvo vittatis, metatarsis testaceis. 



Male. Black, shining. Proboscis and antenna tawny, the 

 latter brownish towards the tips. Thorax with tawny spots. Pectus 

 testaceous, with a black oblique stripe on each side. Abdomen very 

 slender, more than six times the length of tbe tborax ; segments 

 tawny at the base. Anterior legs tawny; each femur and tibia with 

 a black band; knees black; tarsi with very long spines. Hind legs 

 black; femora and tibial with tawny subapical bands; femora and 

 tarsi tawny towards tbe base. Win»s limpid ; veins black. Hal- 

 teres whitish, with black knobs. Length of the body A\ lines ; of 

 the wings 5 lines. 



a. Para. From Mr. Bates' collection. 



22. Leptogaster multicinctus. 

 Leptogaster multicinctus, Diptera Saundersiana, Pt. 2, 155. 

 South America. 



23. Leptogaster annulipes. 



Mas. Piceus ; pectus fulvum, albido tomentosum ; abdomen 

 nigrum, segmentorvm marginibus posticis testaceis ; pedes 

 fulvi, femoribus tibiis tarsisque basi albidis, femoribus tibiis- 

 que fusco trifasciatis, tarsis posticis genubusque fuscis ; alee 

 limpidce. 



Male. Piceous. Head, proboscis and antennae black. Pectus 

 tawny, with whitish tomentum. Abdomen black; hind border of 

 tbe segments testaceous. Legs tawny, rather stout; knees brown ; 

 femora, tibia? and tarsi whitish towards tbe base ; femora and tibiae 

 with three brown bands ; hind tarsi mostly brown. Wings limpid ; 

 veins black. Halteres testaceous, with brown knobs. Length of 

 the body 4 lines ; of the wings 6 lines. 



a. Para. From Mr. Bates' collection. 



