LIST OF D1PTERA. 483 



first, beset with a few short black bristles ; third joint very slender, 

 long spindle-shaped, piceous towards the tip, much longer than the 

 first and the second joints ; bristle black, very stout, about half the 

 length of the third joint: chest thinly covered with very short hoary 

 hairs, red on each side in front : breast gray : abdomen club-shaped, 

 very slender from the base to more than half the length, widening 

 thence to the tip, narrower than the chest and about thrice its length, 

 thinly clothed with hoary hairs, beset with long hoary hairs and 

 black bristles on each side towards the base: legs black, clothed 

 with short tawny hairs, beset with a few short black spines ; feet 

 armed with long black spines ; thighs red towards the tips ; shanks 

 with tawny stripes : wings yellowish brown, darkest towards the base ; 

 wing-ribs piceous ; veins black, piceous towards the base ; poisers 

 tawny. Length of the body 8 lines; of the wings 12 lines. 



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



Leptogaster Datis, n. s. Niger, pectore cinereo, abdominis lateri- 

 bus fulvo maculatis, antennis rufis basi piceis, pedibus fulvis, 

 tarsis piceis basi fulvis, femoribus posterioribus nigro vittatis, 

 tibiis posticis apice piceis, alis fuscis ad costam ferrugineis. 



Body black : head a little broader than the chest : hind part 

 and under-side covered with white down and beset with short white 

 hairs ; front and clypeus covered with pale yellow down ; clypeus 

 armed with pale yellow bristles : eyes black ; fore part flat, its facets 

 much larger than those of the other part : lip black, clothed at the 

 tip with pale yellow hairs : feelers red ; first joint piceous, clothed 

 with a few tawny hairs ; second joint longer than the first, beset 

 with some short black bristles ; third joint long spindle-shaped, 

 much longer than the two preceding joints; bristle stout, black, 

 about half the length of the third joint: chest thickly clothed with 

 short tawny hairs : breast gray: abdomen club-shaped, narrower 

 than the chest and about thrice its length, very slender from the 

 base to more than half the length, widening thence to the tip, 

 clothed with short tawny hairs ; sides of the borders of the segments 

 tawny : legs tawny, clothed with tawny hairs ; feet piceous, armed 

 with black spines, tawny at the base ; claws black ; hind thighs 

 striped with black on each side ; hind shanks piceous at the tips ; 

 middle thighs very slightly streaked with black : wings brown, fer- 

 ruginous along the fore borders ; wing-ribs piceous ; veins black, 

 ferruginous towards the base and along the fore borders ; poisers 

 pale ferruginous. Length of the body b\ lines ; of the wings 8 

 lines. 



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

 PART II. 2 U 



