1914.] 1 53 



I have taken 3 males— 2 of them indoors, both in the first week 

 of August, 1912, and the 3rd was found mixed up with vitrea, the 

 locality and date being Stoke Wood, 14/10/09. The most obvious 

 points for its recognition are the dark legs, and the bold sweep of 

 the 1st thin vein into the area of the wing. With lutei-femorata it 

 agrees in the stoutness of the hind femora and the curve of the 1st 

 thin vein, but otherwise is quite different. For in hdei-femorata, to 

 mention only some of the distinctions, the legs are yellow ; the 

 hypopygium smaller, its flaps symmetrical, very long, slender and 

 of a yellow colour, and bent at the base ; and lastly the 2nd and 3rd 

 costal divisions in both sexes are distinctly swollen, an important 

 character overlooked in the original description. 



ApMochxta submeigeni, sp. n. Extremely like meigeni, but not 

 half the size, and with no bristles on the outer- side of the seam on the 

 middle and hind tibiae. 



9 . As in meigeni the thorax is yellow or reddish-yellow, the abdominal 

 segments black with yellow hind-margins, the 2nd segment projecting at the 

 sides and hence wider than the others. The head has been rather pressed out 

 of shape, but the several parts apparently as in meigeni. Wings almost colour- 

 less, costa barely to wing middle, venation as in meigeni. Legs yellow, a dark 

 spot at apex of hind femora, tibial bristles large and sparse, and present only 

 on the inner side of the seam, no trace of any on the outerside of seam. 1| mm. 



I took a single female on the Monnow, 22/6/12. The absence of 

 all trace of a double row of bristles on the middle and hind t 

 which is the characteristic of the meigeni group, seems to I 

 sufficient importance for treating it as a distinct species. 



ApMoclxseta elongata, sp. n. This also belongs to Section B, — 

 which the scutellar bristles are 4 in number, and its position will be 

 next to campestris. 



9 . Thorax and abdomen black, the former somewhat shining and with 

 bristles on the meso-pleurse ; the latter dull, long and slender, segment 2 the 

 widest, the others gradually diminishing, the last or 6th cylindrical, and 

 remarkably long and narrow, considerably longer than any other segment, and 

 armed with some small bristles at the end. Frons somewhat shining, fully 

 \ broader than long ; supra-antennal bristles small and approximated, i.e., well 

 within an alignment with the inner bristles of the middle frontals, the under 

 pair half the size of the upper ; antennae rather small ; palpi dusky yellow. 

 Wings nearly clear, veins yellow, fringe rather short, costa barely to wing 

 middle, 1 fxdly twice as long as 2, angle at fork moderate, thin vein 1 runs 

 with a gentle and uniform curve to end well in front of the apex. Legs 

 yellowish-brown, tibial bristles rather weak. 1} — 1\ mm. 



