LIMNOPHILA 231 



one line;' the small cross-vein gently arcuated ; the end of the fifth 

 vein strongly arcuated ; the long verticils of the antenna?, the 

 comparatively long feet, etc. 



26. L,. lent a 0. S. % and £. — Ochracea, fronte canescente ; antennae 

 maris dense pubescentes ; alse iramaculatae ; cellulis posterioribus 

 quatuor. 



Ocbraceous, front grayish ; antenna? of the male densely pubescent ; wings 

 immaculate ; four posterior cells. Long. corp. 0.27 — 0.32. 



Syn. Limnophila lenta 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 241. 



Ochraceous yellow ; palpi and antenna? (except the basal joints 

 of the latter), brownish ; the antenna? of the male, if extended 

 backwards, would reach a little beyond the root of the wings ; the 

 joints of the flagellum are elongated-elliptical, and each of them 

 is clothed on both sides with a dense pubescence; the verticils 

 are but little longer than this pubescence ; in the female there is 

 no conspicuous pubescence, and for this reason the verticils, 

 although short, are more distinct. The front and vertex are 

 grayish, the former even with a slight silvery reflection. Thorax 

 ochraceous yellow, opaque above, without apparent stripes ; 

 halteres yellow ; abdomen yellowish ; feet pale yellow ; tips of 

 the tarsi, sometimes also the extreme tips of the tibia?, infuscated. 

 Wings subhyaline, with a faint yellowish tinge ; veins yellowish 

 or yellowish-brown ; stigma pale, sometimes faintly infuscated at 

 the cross-vein. Praefurca comparatively short (not much longer 

 than the anterior branch of the second vein), strongly arcuated 

 at its origin ; petiole of the first submarginal cell about the length 

 of the great cross-vein ; the marginal cross-vein is usually between 

 the inner end of the first submarginal cell and the tip of the first 

 longitudinal vein ; anterior branch of the second vein oblique ; 

 the inner ends of the second submarginal, the first posterior, and 

 the discal cells are nearly in one line ; only four posterior cells. 



Sab. Virginia, Maryland ; Illinois (Kennicott). 



In the male forceps of this species the usual falciform appen- 

 dages are less parallel and more diverging at the tip, when in 

 repose, than in the other species. The shape of the first sub- 

 marginal cell, the arcuated small cross-vein, etc. of this species 

 may indicate a slight degree of relationship to L. quadrata ; but 

 the course of the praefurca, the structure of the antenna?, etc. are 

 different. 



