1911] Alexander — Synou/jmical and Other Notes on the Tipulidce (Diptcra) 197 



Basal deflection of Cui anterior to the middle of cell 1st M2. R2+3, so arcuated 

 that Rs is not in a direct line with R3. 2d Anal vein curved sharply inward at its 

 tip. Cell R3 is decidedly anterior to cell Rs and about on a level with cell 1st Mj. 

 Ml + 2 fused to the wing-margin, eliminating cell Mi. (See fig. 3.) 



Limnophila noveboracensis comes in the same category with 

 lenta, O.S., quadrata, O.S.; nigrilinea, Doane and antennata, Coq. 

 in that it lacks cell M^. It differs from these species as follows: 



L. lenta, O.S. (fig. 1) (E. U. S.) has: Sci, slightly longer than 

 Sc2; petiole of cell R2 (1^2+3) rather long, two thirds the length of 

 R2; cross- vein r usually just beyond the fork; vein R2 short, ob- 

 lique; Kg almost on a straight line with II3; cells R3, R5 and 1st 

 M2 all on a level; distal portion of vein M3 rarely longer than cell 

 1st M2; Rg usually short, arcuated at origin; coloration, ochra- 

 ceous-yellow. 



L. quadrata, O.S. (fig. 2) (E. U. S.) has: Sc2 longer than Sc^; 

 petiole of cell R2 (R2+3) nearly as long as R2; the cross- vein r in- 

 serted just beyond the fork; vein R2 short, oblique; Rg in a straight 

 line with R3; cells R3, R5 and 1st M2 all on a level; distal portion 

 of vein M3 about as long as cell 1st M2; Rg long, gently arcuated 

 near its origin; coloration yello^ash-gray. 



L. nigrilinea, Doane (Jour. N. Y. Ent. Soc, VIII, p. 190) (W. 

 U. S.; Olympia, Wash.) has: Petiole of cell R2 one and one half 

 the length of the basal deflection of Cui; cross- vein r slightly re- 

 moved from tip of Rj; cell R3 slightly anterior to cell R5; general 

 color yellow, with a black dorsal band. L. (female) 12 mm. ; distal 

 portion of wings pubescent. 



L. antennata, Coq. (Jour. N. Y. Ent. Soc, XIII, pp. 58, 59) 

 (W. Am.; Brit. Col.) has: Petiole of cell R2 obliterated or nearly 

 so; cross-vein r at the tip of R^; cell R3 slightly anterior to cell 

 R5; general color black; antennae of the male long, reaching the 

 base of the 6th abdominal segment. 



Although noveboracensis agrees, superficially, with lenta and 

 quadrata, it belongs to a very different group of species. In all 

 respects except the presence of cell M^, this species is a typical 

 member of the luteipennis group of the genus. The four species, 

 luteipennis, contempta, inornata and the present species, agree in 

 possessing the following group characters: Structure of the head, 

 narrowed and prolonged behind; neck produced forewards to 



