LIMNOPHILA. 221 



nata) ; verticils moderate. Thorax opaque, of a dull yellowish- 

 gray ; mesonotuni yellowish-brown, grayish along the margins ; 

 stripes almost obsolete ; pleurae and metanotum hoary gray. 

 Halteres yellow ; knob somewhat infuscated. Feet yellowish- 

 brown ; the tips of the femora, of the tibiae, and the tarsi darker ; 

 abdomen brownish ; venter paler ; forceps reddish-yellow. Wings 

 unicolorous, with a very slight brownish tinge ; the stigma but 

 faintly clouded along the marginal cross- vein, which is very near 

 the tip of the first longitudinal vein and rather distant from the 

 inner end of the first submarginal cell ; the petiole of the latter 

 is of about the same length with the distance between the tip of 

 the praefurca and the small cross-vein, and distinctly shorter than 

 the great cross-vein ; the second submarginal cell is therefore but 

 little longer than the first posterior; preefurca nearly straight; 

 seventh longitudinal vein very gently bisinuated. 



Hah. Northern States ; a single male specimen. (I have lost 

 the label with the precise locality; the specimen is caught by 

 me, and therefore either in the State of New York, or in New 

 Hampshire.) 



This species has a superficial resemblance to L. inornata, but 

 is easily distinguished by the different structure of the antennse, 

 which might almost be called submoniliform ; by the much 

 shorter second submarginal cell, the proximity of the marginal 

 cross-vein to the tip of the first longitudinal vein, and the much 

 shorter feet and tarsi. The impressions on the humeri and the 

 double dot in front of the mesonotuni are black, and very distinct. 

 The second posterior cell, in my only specimen, is shorter than 

 its petiole, and the great ci'oss-vein is a little beyond the middle 

 of the discal cell. 



11. Yi. lireTifurca 0. S. %. — Fui?cana, thorace concolore, vittis ob- 

 soletia, alis dilutissime fusco tinctis, unicoloribns ; cellula submarginalis 

 secunda et posterior prima subjeque longne ; posterior secunda perbrevis, 

 petiolo longissimo. 



Brownish, thorax of the same color, stripes obsolete ; wings faintly tinged 

 svith brownish, unicolorous ; second submarginal cell of almost the same 

 length with the first posterior cell ; second posterior cell very short, with 

 a very long petiole. Long. corp. 0.27. 



Syn. Limnophila brevifurca 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 237. 

 Head brownish-gray, antennce and palpi brown ; joints near the 



