James Waterston 5 



tively. Tarsus, 14 : 7 : G. Hind legs, femur shorter (5 : 6) than tibia, comb of the 

 latter 10 spines, longer spur § of the first tarsal joint, second very short about I of 

 the first. Tarsus 12, 8, 7. 



Abdomen. Along the mid line the first tergite exceeds all except the seventh, 

 which is slightly longer, 2-4 and 6 are subequal, 5 longer. Setigerous process half as 

 broad again as long, with 3 long and 1 shorter seta. Distance between the processes 

 greater (3 : 2) than the longest seta or (3:1) than the distance from either process 

 to the spiracle. The latter minute, circular, 12-14 bristles distally on spiracular 

 overlap. Pattern of abdomen raised and coarser anteriorly on first tergite, smoother 

 posteriorly and medianly. Terebra distinctly shorter than its sheath. Distal portion 

 of the latter (§ the base) with one bristle. 3-4 bristles apically on the pleural flap 

 above. 



Length 1-3 mm. 



Alar expanse, 3 mm. 



cJ. Head, broader than long (nearly 5 : 4) much broader relatively than in 2. 

 The base line of the eyes cuts off the upper \ of the toruli. The latter at their nearest 

 separated by more than, and from the clypeal edge by £ of, their own length. 



Antenna (Fig. 3 a), length 1-1 mm. Scape over thrice the pedicel equal to the 

 first two and £ of the third funicular joints together. Funicle of practically equal 

 width but widest on the third joint with the unsegmented club tapered apically. 

 The second joint is the shortest. 



Throughout the antenna bears numerous moderately strong fuscous bristles 

 which are more or less curved apically. At the upper distal angle (in profile) of each 

 funicular joint and about the middle of the dorsal edge of the club is a tubercle 

 (very conspicuous on joints 2—4) emitting a single characteristic fine hyaline bristle. 

 Being neither coloured nor apically curved, these bristles in spite of their fineness 

 are exceedingly conspicuous. There are few sensoria. 



Thorax and propodeon together shorter than abdomen. 



Wings. Forewings a little over twice as long as broad, about the same length 

 (1-3 mm.) as in the 5 but broader. Hind wings slightly more (22 : 7) than three 

 times as long as broad. 



Forelegs, tibia just shorter than femur. 



Abdomen, tergite 7 longest — half as long again as 1. 



Last sternite apically broadly emarginate. Genitalia. Basal plate with 6-7 

 bristles on each side. Paramer bidentate, rather slender, about § the breadth of the 

 plate in length. 



Dimensions much as in $ the abdomen however slightly longer. 



Type $ in Brit. Mus. one of a series (<J, ?) bred from larva of Oxygrapha (Peronea) 

 comariana, Z., England, Cambridge, Summer 1918 and 1919 (F. R. Petherbridge). 



(The figures illustrating this paper are reproduced by permission of the Ministry 

 of Agriculture.) 



