FUNGUS GNATS OF NORTH AMERICA. 183 



lower margin of pleura brownish ; setse black, fine hairs pale ; 

 4 scutellar setje black. Abdomen yellow, tergites black, except- 

 ing the wide posterior margins; hairs pale. Hypopygium (fig. 

 141) yellow with a black margin, resembling that of M. ornata 

 Meig., superior forceps (fig. 142s) folded down in the figure. 

 hidden by the large lobular intermediate appendages ; the ventral 

 sclerite with short lateral setose lobes (inferior forceps?) and 

 having two strong mesad projecting spines; mesad of these is 

 a pair of pectinate processes each with five or six teeth. Legs 

 yellow, fore metatarsus about a twelfth shorter than the tibi^; 

 setse of hind tibiae about as long as the diameter of the member. 

 Wings hyaline, yellowish tinged, larger veins yellowish brown ; 

 subcosta ends in the costa before the distal end of the cell Ri 

 which is twice as long as wide ; subcostal crossvein near the 

 middle of this cell; R4+5 ends at the apex of the wing; petiole 

 of media is ^ as long as Mo ; cubitus forks under the R-M 

 crossvein; anal vein strong; wing 5.5 mm. long, which is 2.5 

 times as long as the fore metatarsus. Halteres yellow. 



Female. A female taken in cop. with the above differs in 

 being paler (perhaps immature), having only traces of thoracic 

 stripes ; abdominal markings pale brown, confined to the basal 

 half of the segments ; wing twice as long as the fore metatarsus. 

 One pair taken by Professor Aldrich at Juliaetta, Id. Also one 

 specimen from Muir Woods, Marin Co., California, and another 

 from Selkirk Mts., B. C, taken by Mr. J. C. Bradley. 



Var. a. A female specimen from Moscow, Id., collected in 

 June by Professor Aldrich and another collected in ]\Iuir Woods, 

 California, by Mr. J. C. Bradley, dififer in being rather darker, 

 in having the cubitus fork distad of the R-M crossvein and the 

 subcostal crossvein placed near the basal fourth of the cell R^. 



Var. b. A female specimen taken in the Sierra Morcna Mts., 

 California, by Mr. J. C. Bradley in April dififers in having the 

 fore metatarsus .8 as long as the tibia, the fork of the cubitus 

 proximad of the R-M crossvein and the subcostal crossvein 

 distad of the middle of the cell R,. It is barely possible that 

 this is the female of M. calcarata Coq. 



21. Mycoiuya mii^^afona n. sp. 

 ii!i_i:;aforia JJ^hccIcr. MS. (Sciophila). 

 Female. Fcugth 3 mm. Face and 2 or 3 liasal jiMuts of tlie 

 robust antenna; pale yellow : ]ialpi and ajiical joints of antciuias 



