./ 



l\^ 



256 MAINE AGRICULTURAL EXPERIMENT STATION. I9II. 



ii. Genitalia not as described above. 



j. Two ocelli, none in the middle ; costa not pro- 

 duced beyond the tip of the radial sector; 

 ( - ,,,! branches of cubitus usually parallel on , , ,. r 



phSU^fLA^l-*^ '^'^^ apical third. (Fig. 245). V 31. Mycetophila.' ^' . ^T t 



jj. Three ocelli present, middle one minute. 



k. Branches of the cubitus make a very acute 

 angle with each other and slightly diver- 

 gent ; fork usually proximad of the fork 

 of the media; costa usually slightly pro- 

 duced beyond the tip of the radial sector. ^ . 



29. Bpicypta. ! '' ) 

 kk. Branches of the cubitus more or less con- 

 vergent, rarely parallel, fork frequently 

 distad of the fork of the media; costa , ^^ ] 

 ends at tip of Rs. 30. Mycothera.ri ^ ■ 



I. Genus Gnoriste Meigen. r J 



Syst. Beschr. i. 243. 1818. 



Proboscis slender, longer than head and thorax combined ; 

 the palpi near the apex (Part I, fig. 53) ; ocelli 3, the laterals 

 remote from the eye margin. Wings large; costa produced 

 beyond tip of the radial sector (Rs) ; subcostal vein long; sub- 

 costal crossvein (Scs) present; fork of the cubitus proximad 

 of the fork of the media; anal vein incomplete. (Fig. 169). 



Table of Species. 



a. Proboscis over .7 the length of the insect to tip of abdomen ; cubitus 

 forks proximad of the proximal end of the crossvein, somewhat 

 variable ; costa distinctly produced beyond the tip of Rs ; sub- 

 costa ends at or proximad of the base of Rs. N. Y. ; Calif. (Fig. 

 169). I. incgarrhina. y 



aa. Proboscis less than I of the length of the insect. 



b. Proboscis over half the length of the insect; fore metatarsus and 

 its tibia subequal in length. 2. groenlandica. 



bb. Proboscis less than I as long as the insect ; fore metatarsus short- 

 er than the tibia, 

 c. Cubitus forks sliglitly proximad of the base of Rs ; the sub- 

 costal crossvein indistinct, proximad of the middle of the 

 subcosta. (Fig. 170). 3. macra n. sp. 



cc. Cubitus forks nearly under the base of Rs ; the subcostal 

 crossvein distad of the middle of the subcosta. 4. apicalis. 

 G. dcntotn Scudder is a fossil from Utah. 



