[Reprinted from Insecutor Inscitiae Menstruus, Vol. V, Nos. 1-3, 1917.] 
A NEW CTENACROSCELIS 
(Tipulidce, Diptera) 
By CHARLES P. ALEXANDER' 
The crane-fly described below is one of the largest, if not 
the very largest, member of its family. The allied Ctenacros- 
celis prcepotens Wiedemann (Aussereur. zweifl. Insekt., 1, 40, 
41, 1828, as Tipula) has long been considered to be the giant of 
the family ; but the wing of the female of prccpotens barely at- 
tains a length of 40 mm., whereas the male of the new species 
measures at least as much ; the females are larger than the 
^Contribution from the Entomological Laboratory of Cornell University. 
