LIMNOPIIILA. 215 



more slender towards the tip ; the verticils are of moderate 

 length. Wings subhyaline, with a slight yellowish or brownish 

 tinge ; veins somewhat pubescent j those near the costa yellowish, 

 the other veins brownish ; stigma pale, sometimes very slightly 

 infuscated ; the most striking character of the venation is the 

 shape of the discal cell (Tab. II, fig. 6) ; it is long and narrow ; 

 its inner end reaches the middle of the length of the wing, 

 and is but little more distant from the basis of the wing than 

 the origin of the praefurca; the second submarginal and first 

 posterior cells are also very long, and have their inner ends ex- 

 actly in one line, at a distance beyond the inner end of the discal 

 cell, which is about equal to the great cross«vein or longer ; the 

 length of these cells causes the praefurca to be very short, dis- 

 tinctly shorter than the discal cell ; the petiole of the first sub- 

 marginal cell is about equal to the praefurca in length, or a little 

 longer ; this cell is elongated, sometimes angular at its inner end ; 

 the marginal cross-vein is very faint, about the middle of the 

 distance between the tip of the first longitudinal vein and the 

 inner end of the first submarginal cell ; the subcostal cross-vein 

 is at a distance from the tip of the auxiliary vein, which is a 

 little shorter than the length of the great cross-vein ; great cross- 

 vein more or less near the middle of the discal cell, often a little 

 beyond it. 



Hab. Trenton Falls, N. Y. ; Maryland ; Washington, D. C. 

 Not rare in May and June. 



12. L. adusta 0. S. % and 9. — Flava, thorace ferrugineo, nitido, 

 fronte cinerea ; praefurca brevi, arcuata ; alarum margine apicali in- 

 fuscato. 



Yellow, thorax reddish, shining, front gray ; praefurca short, arcuated ; 

 apical margin of the wings clouded with brown. Long. corp. 0.3 — 0.5. 



Syn. Limnophila adusta 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 235. 



I possess a series of specimens, varying considerably in their 

 size and in the coloring of their wings, but having the following 

 characters in common : — 



Head gray, opaque above ; rostrum brownish-yellow, palpi 

 brown ; antennae short in both sexes, yellowish, basal joint some- 

 times darker ; verticils of moderate length, black ; basal joints 

 of the fiagelluni elongated-elliptical, becoming more long and 



