LIMNOPniLA. 21T 



Hah. United States ; I have seen specimens from most of the 

 Middle and Novthern States ; as far south as Georgia, west as 

 Northern Illinois and the Upper Wisconsin River, and north as 

 Maine (Mr. Packard). The specimen from Maine is one of the 

 largest and most clouded upon the wings ; a series of specimens 

 from Delaware, Pennsylvania, and Maryland are small, with pale- 

 colored wings. 



13. li. luteipennis 0. S. % and 9. — Fuscaiia,tlioracelinea media 

 fusca, pleuris canescentibus ; alis fiiscanis, iiebnlis obsoletis paucis ob- 

 scuris ; cellula submarginalis secunda posteriori prima conspicue lougiur ; 

 longitudiualis septimae apex inciirvus. 



Prowuisli, thorax with a brown line in the middle, pleurae grayish ; wings 

 brownish with a few obsolete clouds ; second submarginal cell con- 

 siderably longer than the first posterior ; seventh longitudinal vein in- 

 curved at the tip. Long. corp. 0.28 — 0.3. 



Syx. Limnophila luteipennis 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1S59, p. 23G. 



Head narrowed posteriorly, meeting a neck-like prolongation 

 of the collare ; front and vertex brownish-gray ; rostrum and 

 palpi brown ; antennas brow^i ; first joint grayish above ; basis 

 of the third joint pale ; joints of the flagellum rather short, 

 becoming more slender towards the tip ; verticils moderate. 

 Thorax opaque, brownish above, gray on the sides ; stripes 

 nearly obsolete, but a brown longitudinal line in the middle 

 always distinct. Halteres with a dusky knob. Feet tawny ; tips 

 of the femora very faintly, tips of the tibios and of the tarsi more 

 distinctly infuscated. Abdomen yellowish-brown ; venter paler ; 

 forceps brownish-yellow ; ovipositor of moderate length, gently 

 arcuated. Wings (Tab. II, fig. 10) tinged with brownish; there 

 are faint brownish clouds at the origin of the proefurca, the inner 

 end of the second submarginal cell, and on the marginal cross- 

 vein (other clouds, on the cross-veins, at the inner end of the 

 second posterior cell, and at the tips of the sixth and seventh 

 longitudinal veins are almost obsolete, and generally invisible 

 except in fresh specimens) ; veins brown ; first longitudinal 

 ferruginous ; prajfurca of moderate length, straight, except at the 

 basis ; petiole of the first submarginal cell about half the length 

 of the prsefurca, gently arcuated ; marginal cross-vein about the 

 middle of the distance between the inner end of the first sub- 

 marginal cell and the tip of the first longitudinal vein ; branches 



