i«92.] 235 



shining black, witli three broad black stripes separated in front by white spots ; 

 post-sutural outer dorso-central bristles three in number ; abdomen black and 

 glabrous, with sub-interrupted, rather narrow, grey fascioe on the front marghis of 

 the segments, which have both discal and marginal setiie ; legs black and setose ; 

 wings brown, darker along the front margins. Not common ; I captured it in 

 Kent in June, 1888. 



41.*— PLESINA, Mgn. et Schnr. 

 Stevenia, Dsv. et End. 

 Leucostoma, Zett. et Mcq., p. 



Gen. ch. — Species small, with black marked wings, in which the 

 outer cross vein is placed much nearer to the inner one than to the 

 bend of the fourth vein ; eyes nude, approximate in the male, and 

 moderately wide apart in the female ; cheeks narrow, and, like the 

 facialia, without ciliae ; antenusD small and short ; arista slightly 

 pubescent ; wings with the first posterior cell with a stalk nearly as 

 long as the outer cross vein. 



P. MACULATA, Tin. 



Frontalia with the sides black, and with metallic lustre, central stripe dull 

 black or piceous ; face glistening white, with dark reflections ; antennae very small 

 and rufous ; arista very short ; palpi very small and pale ; thorax shining black, with 

 slightly grey shoulders, and with three post-sutural outer dorso-central bristles; 

 abdomen black, glabrous, and immaculate, without discal setse; alulae white; 

 halteres with a yellow stalk and dark head ; wings with a large black patch on the 

 upper and distal half, and with the cross veins and further half of fourth vein 

 clouded with black ; legs black or piceous. Eare ; in Mr. Billups' collection. 



43.— PHYTO, Dsv., End.,;?. Schnr., ^. 

 Ehinophoea, Mgn., p. 

 Ptyloceea, Mcq., p. 

 Savia, End., p. 



Gen. ch. — Species rather larger than in the last genus, and more 

 griscescent ; they also differ by having much shorter wing-stalks (their 

 length not being more, and sometimes less, than a fourth of that of 

 the outer cross vein) ; and by the position of the outer cross vein, 

 which is placed rather nearer to the bend of the fourth than to the 

 little cross vein ; the cheeks have a few scattered fine hairs, but no 

 setae ; the eyes are rather widely separated in both sexes ; the antennse 

 have the third joint a little longer than the second ; and the abdomen 

 is either with or without discal setae. 



1 (2) Abdomen marked with grey fasciae 1. melanocephala, Mgn. 



2 (1) Abdomen without fasciae 2. ni^ra, Dsv. 



* I keep to the numbers that I originally gave to the genera, though I have arranged them 

 in a new order. 



