12 DIPTERA OF NORTH AMERICA. [PART IV, 



JIab. Labrador (Mr. A. S. Packard, Jr.) ; four male specimens. 



This species will be easily distinguished from D. hseretica by 

 its brown rostrum, the darker tinge of its wings and of its stigma, 

 by the greater distance between the subcostal cross-vein and the 

 tip of the auxiliary vein ; by its unusually long halteres, and in 

 general by its darker coloring. I can perceive a tooth at the 

 basis of the ungues. The excision at the basis of the last tarsal 

 joint of the male is likewise distinct. 



I possess a male specimen from Canada, the halteres of which 

 are of the same length as those of D. halterata ; the venation 

 and coloring of the wings are likewise the same (the stigma is 

 slightly paler) ; but the thorax is brownish ochraceous, except 

 the space on the back, usually occupied by the stripes, which 

 is brown. Is it not a paler variety of D. halterata ? 



14. IK. l3adia Walk. % and 9 • — Fusca, abdominis fasciis pallidis ; 

 pedibus fuscis, femorum apice pallido, alis fusco-nebulosis ; stigmate 

 subquadrato, fusco. 



Brown, abdomen with pale bands ; feet brown, tip of the femora pale ; 

 wings clouded with brownish ; stigma nearly square, brownish. Long. 

 Corp. 0.3—0.35. 



Syn. Limnohia hadia Walk., List, etc. I, p. 46. 



Dicranowyia humidicola 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 210. 



Rostrum, palpi, and antennsa dark brown ; front and vertex 

 grayish-brown. Thorax tawny with more or less confluent brown 

 stripes ; a faint yellowish, sericeous reflection in the humeral 

 region ; pleura3 brown, with some paler spots ; halteres pale, 

 knob infuscated ; coxse pale ; feet tawny ; a pale band at the tip 

 of the femora. Abdomen tawny, with pale bands on the incisures; 

 male forceps like Tab. Ill, fig. 2 ; ovipositor of the female ferru- 

 ginous. Wings somewhat tinged with grayish and faintly clouded 

 with brownish ; a pale brown cloud at the origin of the proefurca; 

 another, rounded one, at the inner end of the submarginal cell ; 

 the cross-veins likewise clouded ; stigma brown, in the shape of an 

 elongated square. Tip of the auxiliary vein generally a little 

 beyond the origin of the prfcfurca, sometimes nearly opposite it, 

 the cross-vein very near its tip. 



Eah. Washington, D. C. ; Trenton Falls ; Connecticut ; Canada. 



