1-iO O. A. Johannsen — Tertiary Fungus Gnat. 



Akt. XIV. — A Tertiary Fungus Gnat; by O. A. 

 Johannsen. 



Through the kindness of Professor T. D. A. Cockerell I 

 have had the privilege of examining a species of My corny a 

 {Sciophila Winnertzj from the Miocene shales, Florissant, 

 Colorado. As it is unnamed and quite well preserved I take 

 pleasure in describing it. 



My corny a cockerelli n. sp. (Diptera: Mycetophilidse.) 

 Male. Length, 5 mm ; abdomen, 3'5 mm ; wing, 3-5 mm . Head, 

 thorax, abdomen, and femora pale reddish brown ; the vertex, 

 the vitta (or vittae) on mesonotum, some spots on the pleura, 

 the sternum, metanotum, the hind margins of the abdominal 

 segments, the tibiae and tarsi, darker brown. Middle coxae 



apparently with anterior spurs ; fore metatarsus about 1*3 

 times as long as the tibia ; wings about 1*5 times as long as the 

 fore metatarsus, the veins brownish ; the subcosta ends about 

 opposite the middle of the small cell R,, the subcostal crossvein 

 (Sc a ) on the proximal third of this cell ; cell R, about twice as 

 long as wide. The origin of M 2 and Cu, cannot be clearly dis- 

 tinguished. Judging from the course of M,, M 2 arises at a 

 point about midway between the base of the petiole of M and 

 the tip of Mj ; Cu, apparently arises about opposite the base of 

 the R-M crossvein. 



The accompanying camera lucida figure is enlarged about 

 five times. The dotted lines indicate conjectural structure. 

 Holotype in the Peabody Museum (Yale). 



Maine Agricultural Experiment Station, 

 Orono, Maine. 



