FUNGUS GNATS OF NORTH AMERICA. 295 



reddish yellow, with 3 vittse, spots on pleura and the metanotum 

 black. Hairs yellow. Abdomen blackish; hypopygiiim (Fig. 

 104.) Legs yellow, tarsi dusky, fore metatarsus about 4-5 as 

 long as the tibia. Wings hyaline with faint gray cloud on apex 

 of wing extending to the cubitus, less marked in the female; 

 venation r.s figurpd. (Fig. 212). This species differs from 

 C. gracilis in having the costa more produced and in its apical 

 wing cloud. Palo Alta (Aldrich), Berkeley, Cal, (W.M.W.). 



15. Genus Syntemna Winnertz. 

 Verb. Zool.-bot. Ges. Wien. XIII. 767. 1863. 

 Ocelli 3 in number, subequal in size, laterals remote from the 

 eye margin. Abdomen 7-segmented, cylindrical. Legs stout, of 

 moderate length. Wings large ; costa extends beyond the tip of 

 the radial sector ; subcosta either ends free, in which case the 

 subcostal crossvein is present near the tip, or ends in Ri beyond 

 the middle of the basal cell ; the media forks distad of the base 

 of the radial sector; the cubitus forks proximad of the fork of 

 the media (Figs. 213-215). The position of the ocelli will dis- 

 tinguish this genus from Trichonta. The position of the ocelli 

 and the oblique position of the crossvein distinguishes it from 

 Docosia. 



Table of species. 

 a. Males. 



b. Antenna long, third joint over twice as long as broad. 



c. Cubitus forks slightly distad of the crossvein ; ;nal vein not 

 much produced beyond the fork of the cubitus. 



I. rejecta n. sp. 

 cc. Cubitus forks far proximad of the crossvein. 2. longicornis. 

 bb. Antennje rather short, third joint but little longer than broad; 

 cubitus forks proximad of the crossvein. 

 c. Posterior, margins of abdominal segments yellow. 



d. Anal vein extends at least a fourth of its length distad of 

 the fork of the cubitus, 

 e. Abdomen brown. 3. vittata. 



ee. Abdomen fasciate with yellow. 



3a. vittata var. fasciata n. var. 

 dd. Anal vein scarcely extends beyond fork of the cubitus ; 

 head black, cubitus forks only slightly proximad of the 

 crossvein ; fore metatarsus nearly 7-8 as long as its tibia. 



4. separata n. sp. 



cc. Posterior margins of abdominal segments black ; head yellow, 



cubitus forks far proximad of the crossvein. 5. polysona. 



