FUNGUS GNATS OF NORTH AMERICA. I49 



pygium black, inconspicuous (fig. 121). Coxae and legs yel- 

 low, trochanters tipped with black, tarsi brown ; setse of the 

 legs and on the coxae black; fore metatarsus .7 as long as the 

 tibia ; claws each with 2 short teeth ; empodium brush-like. 

 Wings (fig. 89) smoky hyaline, yellow basally, distal end of 

 the heavier veins yellowish brown, the remaining veins yellow. 

 Costa almost reaches the tip of the wing and is produced half 

 the length of the R-M crossvein beyond the tip of R4+5 ; the 

 snbcosta ends opposite the distal, the subcostal crossvein oppo- 

 site the proximal end of the small cell R^, which is trapezoidal 

 and about as long as broad ; M^ is about 5.5 times as long as the 

 petiole of the media ; the sigmoid curve of R4+5 is quite notice- 

 able ; cubitus forks very slightly proximad of the base of the 

 R-M crossvein ; anal vein strong but incomplete. Halteres yel- 

 low. One specimen taken by Professor J. M. Aldrich on Mt. 

 Constitution, Orcas, Id. Washington, in July. 



5. ( ?) Polylepta grisea Walker. 

 1848. grisea, Walker. List of Diptera. Brit. Museum (Sciophila). 



Body dark grayish brown, clothed with yellowish hairs; eyes 

 black ; palpi tawny ; feelers black, ferruginous at the base ; legs 

 pale yellow ; feet somewhat darker ; wings colorless, veins 

 brown ; poisers pale yellow. Length of the body 4 mm. ; of 

 the wings 8 mm. St. Martin's Falls, Albany River, Hudson 

 Bay. 



Recorded also from N. H. 



7. Genus Bmpalia Winnertz. 

 Empalia, Winnertz. Verb. Zool.-bot. Ges. Wien, XIIL yG^,. 1863. 

 Head, eyes, antennae, and legs as with Sciophila (Lasiosoma). 

 Ocelli 3 in number, the laterals large, the middle one rather 

 small, placed in a nearly straight transverse line, somewhat sep- 

 arated from each other, on the broad front. Palpi 4 jointed, 

 incurved, the first joint small, the second twice as long, the 

 third longer than the first 2 taken together, the fourth filiform, 

 half again as long as the third. Thorax small, oval, highly 

 arched, mesonotum short haired and without setae; scutellum 

 small. Abdomen 7 segmented, constricted at the base, taper- 

 ing toward the apex ; in the male compressed, in the female 

 cylindrical, the ovipositor ending in 2 small lamellae; the hairs 

 short and appressed. Wings elongate oval, with rounded base, 



