644 LIST OF DIPTERA. 



white hairs and bristles ; feet darker : wings whitish, brown towards 

 the tips of the fore borders ; cross-veins clouded with brown ; wing- 

 ribs and poisers tawny : veins pitchy. Length of the body 2 lines ; 

 of the wings 4 lines. 



a. Congo. Presented by Sir. J. Eichardson. 



Psilopus gemmeus. Purpureas, viridi cupreoque varius, antennis 

 nigris, pedibus fulvis, femoribus nigris, alis fuscis subfusco va- 

 riis, apicibus marginibusque posticis limpidis. 



Head bright purple, green in front and on each side of the 

 crown : eyes red : mouth tawny : feelers black : chest green, pur- 

 ple on the disk, beset with long black bristles : abdomen bluish 

 purple on the back, green, and varied with copper-colour on each 

 side and beneath, beset with long black hairs and bristles, covered 

 with whitish bloom, which is visible horizontally, more than twice 

 the length of the chest ; tip black : legs tawny, adorned with rows 

 of very small black spines ; hips green, clothed like the breast with 

 white bloom ; thighs black, clothed with a few white hairs towards 

 the base ; shanks armed with a few black bristles, which increase in 

 length from the base to the tip ; feet pitchy towards the tips ; hind 

 legs very long ; hind feet armed with very long black bristles, their 

 tips clothed with short black hairs: wings brown, mottled with paler 

 colour, colourless along the hind borders and at the tips ; wing-ribs 

 and poisers pitchy ; veins black. Length of the body 3 lines ; of the 

 wings 6 lines. 



a. Africa. 



Psilopus gemmans, n. s. Aureo-viridis, thorace cyaneo vittato, ab~ 

 domine basi cyaneo apice cupreo, antennis nigris, pedibus viridi- 

 bus, tarsis nigris, alis subcinereis. 



Body golden green, beset with black bristles : head adorned 

 with a bluish purple spot between the feelers and the mouth: eyes 

 bright red : mouth pitchy : feelers black ; bristle nearly as long as 

 the chest : chest adorned with indistinct bluish stripes : abdomen 

 blue at the base, bright copper-colour towards the tip : legs green, 

 clothed with short black hairs ; thighs furnished with long black 

 hairs; feet black : wings slightly gray ; wing-ribs and veins black ; 

 poisers pitchy. Length of the body 2j lines ; of the wings 4i 

 lines. 



a. West Australia. From Mr. Clifton's collection. 



