228 Mr. F. Walker's Characters of undescribed Diptera 



black, vvliite at the base and with three white bands; one near 

 the base, the second just within the discal transverse vein, the 

 third oblique and siibapical ; halteres whitish. 



Length of the body 2 lines ; of the wings 5 lines. 



Brazil. 



Herina nigritula. 



Foem. — Nigro-viridis, capite supra testaceo, antennis pedibusque 

 nigris, abdomine attenuate, tarsis piceis, alis linipidis, vitta 

 costali nigra, venis albidis, halteribus nigris. 



Female. — Greenish black ; head testaceous above ; antennae and 

 legs black ; abdomen attenuated ; tarsi piceous ; wings limpid, 

 with an irregular black stripe along the costa ; veins whitish ; 

 halteres black. 



Length of the body 1| line ; of the wings 3 lines. 



Valley of the Amazon. 



Herhin inlrudens. 



Foem. — Nigro-cyanea, capite antice ferrugineo, abdominis apice 

 attenualo, pedibus nigris, tarsis basi testaceis, alis albis, 

 fasciis quatuor antice nigris postice cinereis. 



Female. — Bluish black; head dark blue; ferruginous in front; 

 abdomen attenuated at the tip ; legs black ; tarsi testaceous at the 

 base ; wings white, with four bands which are blackish along the 

 costa, pale grey hindward; third and fourth bands connected on 

 the costa ; halteres whitish. 



Length of the body 1| lines; of the wings 2^ lines. 



Valley of the Amazon, 



Herina ? divisa. 



Mas, — Fulva, antennarum articulo 3" linear! longiusculo, abdo- 

 mine brevi lato nigro-cyaneo punctate, pedibus testaceis, alis 

 limpidis, linea costali venisque nigris, halteribus albidis. 



Male. — Tawny ; third joint of the antennae linear, rather long ; 

 abdomen dark blue; }>unctured, rather short, broader than tlie 

 thorax ; legs testaceous ; wings limpid, with a black costal line ; 

 veins black ; halteres whitish. 



Length of the body 2 lines ; of the wings 4 lines. 



Para. 



