FUNGUS GNATS OF NORTH AMERICA. 2/5 



that of the media. Halteres and legs yellowish, coxae cinereous, 

 tarsi fuscous. "Greenland." 



Riibsaamen (in Bibliotheca Zool. XX. 104, 98) describing 

 a specimen which he identifies with the above adds that the 

 flagellar joints are distinctly longer than broad, the tarsal claws 

 each have a basal tooth, and gives a figure of the wing in which 

 Set ends proximad of the base of Ri ; Sc-- is distad of the middle 

 of Sci ; petiole of i\I slightly longer than the crossvein; costa 

 produced fpr beyond tip of Rs, and cubitus forks under the 

 petiole of the media. Hypopygium as figured (Fig. 154). 



15. Bolctina tricincta Loew. ^ 

 Berlin. Ent. Zeitschr. XIII. 143. 1869. 



^lale and female. Length 3.2 mm., wing 3.2 mm. Head 

 black, antennae fuscous black, scape and base of the flagellum 

 testaceous or subfusccus ; palpi yellow. Thorax and abdomen 

 shining black ; abdominal sclerites 2-4 with yellow posterior 

 f?.scia; venter except last 3 segments, yellow. Hairs yellow. 

 Hypopygium srhall, similar to that of B. dispecta Dzied. but 

 terminal appendages with 10 apical rays, and forceps diflfer 

 (Fig. 157) ; lamellae of ovipositor pale. Coxae and legs yellow- 

 ish, trochanters with fuscous spot, tibial spurs dusky yellow 

 or pale; tarsi except the base fuscous; fore tarsi of the female 

 tumid. Wings grayish hyaline, heavier veins fuscous. Halteres 

 yellow. "Wis., Md." 



The intermediate antennal joints not twice as long as broad; 

 in the male one claw of the fore and middle feet, modified 

 scoop-like, fluted and with serrate margin, the other claws 

 sharp but with a serrate and scoop-like basal tooth; in the 

 female each claw has a serrate basal tooth. Venation as figured 

 (Fig. 187). Selkirk Mts., B. C. (J.C.B.) ; Me. and Mass. 

 (C.W.J.) ; R. I. (J.B.); Wis. (W.M.W.) ; Ithaca, N. Y. ; 

 Brookside, N. J., (Weidt), July-Sept. ^^ 



16. Bolctina sciarina Staeger. 



Kroger. Ent. Tidskr. 236. 1840. 



Male and female. Length 3-4 mm. ^^^holly blackish brown ; 



coxae, femora, spurs and halteres yellow ; tibiae darker, tarsi 



brown ; hind coxae and sometimes the others also more or less 



brown. Antennae of the male from 1.5-2 times as long as head 



