Makshall. — On A^c'c Zealand Diptcra. 237 



very acute angle with the trunk. Wings covered with shght 

 pubescence. 



Separated from D. dubia by shorter legs and smaller size ; 

 from D. difficilis by character of hairs on wings. (Lincoln, 

 November.) 



B. Second Longitudinal Vein reaching the Margin of tlie Wing beyond 



the Apex. 



Diplosisfragilis,n.sp. (Plate VII., fij. 3.) Male. Antennae, 

 0-049 ; wings, 0066 x 0-027 ; body, 0033 x 0006. Antennae 

 with the joints longer than their pedicels, double joints nearly 

 the same length as their pedicels ; sub-globose ; double joints 

 cylindrical, with transverse suture, smoky-grey in colour ; 

 verticils not numerous, moderately long, black. Thorax fer- 

 ruginous, dark in front but becoming lighter posteriorly. Scu- 

 tellum semicircular, opaque, wdiite. Halteres with long slender 

 white pedicels; club pyriform, with small conspicuous thick 

 black hairs. Abdomen w^ith first segment ferruginous, the two 

 succeeding segments much darker ; the usual scattered hairs 

 are present arranged on the posterior borders of the segments. 

 Legs long and slender, light-yellow ; femur and tibia about 

 equal in length ; first joint of the tarsus very short, second 

 slightly shorter than the tibia, other joints much shorter, the 

 fifth being the shortest. Wings perfectly hyaline, a few short 

 black hairs being scattered over the surface. First longi- 

 tudinal about one-third the length of the wing, marginal 

 cross- veins situated half-way along it ; second longitudinal 

 at first straight, but afterwards strongly arcuated, ending a 

 little beyond the apex ; apex of feet of third longitudinal 

 situated exactly below the end of the first longitudinal. 



I have several specimens, collected at Lincoln during 

 November and December. 



Diplosis hirta, n. sp. Female. Antennae, 0-033 ; wings, 

 0071 X 0-027 ; body, 0-038 x 0-011. Antennae dark-brown ; 

 joints of scapus fuscous ; flagellar joints about twice the 

 length of their pedicels, with one circle of long black verticils 

 attached to the base ; joints cylindrical, but constricted in 

 the middle ; terminal joint with distinct projection from its 

 end. Thorax dark-brown, with two tufts of long black hairs 

 arising on each lateral margin. Scutellum opaque, white. 

 Halteres with long pedicels bearing a club thickly covered 

 with black hairs. Abdomen dark-brown, with its segments 

 much more hairy than in the other species. Legs dark-brown 

 or black, covered with short black hairs — these are longer 

 on the femora than elsewhere ; joints of the legs as in D. 

 frag His. Wings smoky, their surface very densely covered 

 with a brown pubescence ; long, stiff, black hairs project from 

 the costa, and there is a deep fringe extending right round the 



