\ol. xxii] ilNtomological Niiws. 35 1 



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

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

 with M-'. The resemblance to these two genera is probably 

 merely accidental, as, in t,'eneral appearance, the tlies are very 

 dift'crent. 



The type, and only known species, is: 



Sacandaga flava sp. iiov. 



Txpc — Alcoholic 5 , in C. U. collection ; Sport Is., Sacan- 

 daga River, June I2, "09. Cotypes; (i) Sport Island, July 5, 

 'og (collection Bost. Soc. Nat. Hist.). (2), S ; June 27, 'lo; 

 same locality. (3), S ; June 12, 'og; 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 witli a broad median stripe of reddish-brown on 

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

 pra'scutum, 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 pra;scutum to the cephalic margin of the 

 neck. Sides of the neck and thorax, honey-ycUow, 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 

 live 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 in and only one quarter the length of R3. R3 a trifle longer than 

 R2+3. Basal deflection of R^+S as long as /?2; beyond the r-in cross- 

 vein, the vein runs nearly parallel between Rl+i and M1-I-2. 



Media: basal deflection of M1+2 about one-half the length of R2; 

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

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

 half i?2. Second deflection of M3, two-thirds the length of R2. 



