410 TIPULID.E. 



pubescent. Wings narrow, long, about one and a half times to 

 twice the length of the abdomen. One marginal, one sub- 

 marginal, and four posterior cells, and the discal cell always 

 present ; auxiliary vein ending at the middle of the wing, the 1st 

 longitudinal at a little further beyond still ; the 2nd longitudinal 

 beginning before the middle of the wing at a moderately wide 

 angle, and shortly after its origin taking a sudden angular turn 

 upwards, thence running in a gentle curve to the margin near the 

 tip of the wing ; the 3rd vein beginning just below the 2nd, and 

 after the short basal part, running approximately parallel with 

 that vein to the wing-tip or just below it ; the anterior cross-vein 

 in a line with the basal part of the 3rd vein and placed at the 

 proximal corner of the discal cell, which is considerablv elongate, 

 three or four times as long as broad ; the 4th vein has the upper 

 branch forked at the middle of the discal cell, the lower branch 

 simple, bisinuate, all the three branches being approximately 

 parallel to the 2nd and 3rd veins ; posterior cross-vein at about 

 the middle of the discal cell ; the 5th, 6th, and 7th longitudinal 

 veins more or less straight ; subcostal cross-vein at tip of auxiliary 

 vein ; marginal cross-vein always present and distinct, placed at 

 about the tip of the 1st longitudinal, dividing the marginal ceh 1 

 into two more or less equal portions. 



Range. The genus is known onlv from the Orient and Australia 

 except for a single species, L. poeciloptera, Os. Sac., which extends 

 from Sumatra to Japan. 



Owing to the peculiar venation of this genus dipterologists were 

 puzzled for some time as to its correct place in the family ; but 

 Osten Sacken pointed out that the wing represented what might 

 be termed an exaggerated form of Limnolia, the same cells being 

 present, but through the unusual approximation of the origin of 

 the 2nd and 3rd veins, the anterior cross-vein and discal ceU 

 towards the base of the wing, the posterior cells are ah! greatly 

 elongated, which gives the wing its characteristic appearance. 

 Judging from the four or five species I have seen the venation 

 appears remarkably constant. 



Table of Species. 



1. Wing clear ; body wholly bright orange . . rufa, Meij., p. 414. 

 Wing with distinct marks, body grey or 



dull brownish yellow 2. 



2. Wing-marks on longitudinal veins of con- 



siderable length, though very narrow . . fuscinervix, sp. n v p. 411. 

 Wing-marks on longitudinal veins reduced 

 to very small spots 3. 



3. Surface of wing with a few very pale 



grey spots, sufficiently large to reach 



from one vein to another notatinervis, sp. n., p. 412. 



Surface of wing without such pale grey 

 spots punctipennis, Meij.,p. 413. 



