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



towards the base ; veins black ; praebracbial vein forming a right 

 somewhat rounded angle at its flexure, near which it is much 

 curved inward and is thence straight to its tip ; discal transverse 

 vein slightly undulating, parted by less than half its length from 

 the border and from the flexure of the praebracbial ; alulae grey. 

 Length of the body 3g lines ; of the wings 7 lines. 



Genus Pyrellia, Desv. , 



Pyrellia facilis. 



Mas. — Purpurea, capite antico refescente, facie cinerea, palpis 

 antennisqiie fulvis, thorace vittis tribus latis canis, scutello 

 cyaneo, pedibus nigris, alis cinereis basi obscurioribus, venis 

 nigris. 



Male. — Purple ; head reddish in front ; face cinereous ; palpi 

 and antennae tawny ; arista black ; thorax with three broad hoary 

 stripes ; scutellum mostly blue ; legs black ; wings grey, darker 

 at the base ; veins black, praebracbial vein forming a slight curve 

 at its flexure, very slightly curved inward near its end, which is at 

 the tip of the wing; discal transverse vein nearly straight, parted 

 by much less than its length from the border and by little less 

 than its length from the flexure of the praebracbial ; alulae 

 cinereous. 



Length of the body 3^ lines ; of the wings 7 lines. 



South America. 



Pyrellia torpida. 



Fcem. — Cyaneo-viridis, longiuscula, capite nigro antice albo, 

 antennis piceis, pedibus nigris, tibiis ferrugineis, alis vix 

 cinerascentibus, venis nigris, alulis albidis. 



Female. — Bright bluish green ; head black, shining white in 

 front ; antennae piceous ; thorax minutely punctured, rather long 

 and narrow ; legs black ; tibiae ferruginous ; wing hardly greyish ; 

 veins black ; praebracbial vein much curved at its flexure, almost 

 straight from thence to its end, which is at a little in front of the 

 tip of the wing ; discal transverse vein very slightly undulating, 

 parted by much less than its length from the border and by 

 hardly less than its length from the flexure of the praebracbial; 

 alulae whitish. 



Length of the body 3^ lines ; of the wings Qh lines. 



Cape Coast. 



I 



