1032 LIST OF DIPTERA. 



lower cross- vein very slightly curved upward, separated by rather 

 less than its length from the middle cross-vein ; poisers pale tawny- 

 Length of the body If line ; of the wings 3 lines. 

 a. Sierra Leone. Presented by the Rev. D. F. Morgan. 



Group XXI. 



Trypeta Adatha, n. s. Flavo-fusca, gracilis, capite antico abdomi- 

 neque fulvis, hujus apice depresso, palpis antennis pedibusque 

 fulvis, alis longis angustis fuscis bad poslice limpidis maculis 

 fulvis limpidisque seriatim guttatis. 



Body very slender : head and chest yellowish brown, dull, 

 thinly clothed with short black hairs, beset with a few black bris- 

 tles : head paler than the chest, tawny in front, and having a hoary 

 tinge beneath ; sides of the face without bristles ; epistoma very 

 slightly prominent : eyes crimson ; fore part rather flat, its facets 

 larger than those elsewhere : sucker and palpi pale tawny, clothed 

 with paler hairs : feelers dark tawny, shorter than the face ; third 

 joint downy, conical, a little longer thau the second ; bristle black, 

 downy, tawny at the base, about thrice the length of the third joint: 

 chest adorned with four slender brown stripes : breast hoary : ab- 

 domen dark tawny, smooth, shining, thinly clothed with short black 

 hairs along each side, tapering from the base to the tip, where it is 

 flat : legs tawny, rather long and slender, thinly clothed with very 

 short tawny hairs ; claws black, small ; fore thighs armed with a 

 few tawny bristles: wings dark brown, very long and narrow, 

 adorned with very numerous small tawny spots, which are disposed 

 in rows along the areolets between the longitudinal veins ; a row of 

 colourless spots along the fore border, and another along the hind 

 border, which is quite colourless towards the base ; cross-veins 

 nearly straight ; lower cross-vein rather oblique, separated from the 

 middle cross-vein by more than twice the length of the latter ; 

 wing-ribs and veins black ; poisers tawny. Length of the body 2£ 

 lines ; of the wings 6 lines. 

 a. Congo. Presented by Sir J. Richardson. 



