Vol. xxii] ENTOMOLOGICAL NEWS. 351 



under cell first M 2 (discal cell of Osten Sacken), not proxi- 

 mal to it, and the consequent insignificant fusion of Cu 1 

 with M 3 . The resemblance to these two genera is probably 

 merely accidental, as, in general appearance, the flies are very 

 different. 



The type, and only known species, is : 



Sacandaga flava sp. nov. 



Type Alcoholic 9 , in C. U. collection ; Sport Is., Sacan- 

 daga River, June 12, '09. Cotypes; (i) Sport Island, July 5, 

 '09 (collection Bost. Soc. Nat. Hist.). (2}, $ ; June 27, '10; 

 same locality. (3), $ ; June 12, '09; same locality. (4), 

 Gloversville, N. Y., July 3, '09. 



Length 5 mm. ; wing, from 6 to 7 mm. See table of leg measure- 

 ments at the end of description. 



Antennae blackish-brown ; first segment, head and palpi, reddish- 

 brown ; eyes black. 



Thoracic dorsum with a broad median stripe of reddish-brown on 

 a more yellowish ground, beginning on the anterior margin of the 

 praescutum, terminating within a short distance of the posterior 

 margin. To the side of this, and more or less distinctly separated 

 from it, is a broad stripe, beginning near the caudal end of the 

 scutum and extending forwards on the side of the praescutum to 

 near the middle of the latter. A narrow brown stripe extends from 

 the anterior margin of the prsescutum to the cephalic margin of the 

 neck. Sides of the neck and thorax, honey-yellow, becoming infus- 

 cated toward the venter. Legs dusky yellow; halteres light yellow 

 throughout. Abdomen dirty yellowish. Wings hyaline, opalescent; 

 stigma somewhat distinct. 



Details of venation of the species : Subcosta long, Sci at least 

 five times the length of Sc2. Radius quite long, parallel to subcosta 

 till the latter ends, and then parallel to costa for a short distance, 

 at its tip sharply turned upward. The radial sector arises near the 

 middle of R. R2 is very short, oblique, shorter than the cross-vein 

 r-m and only one quarter the length of Ri,. R$ a trifle longer than 

 R2+3. Basal deflection of 7?4+S as long as Rz; beyond the r-m cross- 

 vein, the vein runs nearly parallel between R2+3 and Mi+2. 



Media: basal deflection of Mi+2 about one-half the length of R2\ 

 thence, to the m cross-vein, twice the length of R2. Basal deflection 

 of MS equals R2. Fused portion of M3+ Cui equal to one and one- 

 half R2. Second deflection of A/3, two-thirds the length of R2. 



