4-12 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bllll. 



Connecticut.— East River, Julv 3. 1910 (P:1v): Granbv, Tune 8, 1929 (C. P. A.) 

 Hartland. June 8, 1929 (C. P. A.); Kent Falls. Tune 12-13. 1931 (C. P.A. ) 

 Manitic Lake, Aug. 6, 1929 (C. P. A.): Aliddletown. June 16. 1909 (C.W.I.) 

 Norfolk. June 9, 1929 (C. P. A.); Riverton, June S, 1929 (C. P.A.): Tvler Lake, 

 May 30, June 13. 1931 (C. P. A.) ; W. Granbv, June 8, 1929 (C. P. A.). 



3. Siibtribe Eriopteraria 

 Rhabdomastix Skiise 



1889. RhahdomastLx Skuse; Proc Linn. Soc. Xew South Wales, (2) 



4 : 828-829. 



Subgenus Sacandaga Alexander 



1911. S(ic<()ida</a Alexander; Ent. Xews, 22:351-352. 



The siib<>eniis Sacandaga is represented in our fauna by but few 

 species. Adults may be swept from rank herba^re along the margins 

 of streams, where they appear in small swarms at dusk. Of these 

 species, flava and hudsonica are found along larger streams or rivers; 

 hritfonl and suharctica along margins of lu'ooks or minor streams. The 

 immature stages occur in Avet earth. 



Key to Species 



1. \'eip R^ present as a weak element; m-cit at or close to fork of .1/ (Fig. 47, 



M ) ; northern to Arctic 2 



\'cin R-^ lacking; m-cu from one-third to one-half its own length bevond the 

 fork of M (Fig. 47, L) ^. '. 3 



2. \'eins /?3 and Rt strongly divergent, cell R^ at margin nearly twice as wide 



as cell R..\ vein R3 short, about two-fifths Rt,: macrotrichia of veins 



scanty, there being none on i?3, R^+i or /?n+3+4 caudata 



Veins /?3 and Ri only slightly divergent, cell R^ at margin subequal in extent 

 to cell R'\ vein Rs long, oblique in position, nearly one-half as long as 

 Ri (Fig. 47. M) ; macrotrichia of veins abundant, occurring on Rx. R:ui. 

 A'i.+3+i and on the distal third of Rs subarctica 



3. Size large (wing, $, 7.5-8.5 mm.) ; general coloration yellow, the head and 



thorax conspicuously patterned with grayish brown hudsonica 



Size smaller (wing, 1^, not exceeding 7 mm.); general coloration yellow, 

 unmarked except for reddish brown thoracic areas, when these are pres- 

 ent 4 



4. Size small (wing, $, about 5 mm.); coloration clear sulphur-yellow; vein 



Ri of wings gently curved, provided with scanty macrotrichia : wings hya- 

 line, witiif)ut stigma; veins pale and but little conspicuous (Fig. 47, L) 



brittoni 

 Size larger (wing, S, 6.5-7 mm.); coloration ochreous-yellow, the praescu- 

 tum with reddish stripes ; vein Ri of wings long and nearly straight, usually 

 without macrotrichia (a very few scattered ones occurring in rare cases) ; 

 wings hyaline, the stigma pale brown but usually evident ; veins pale 

 brown, distinct flava 



Rhabdomastix {Sacandaga) brittoni Alex. (Fig. 4T, L). 

 1933. Rhahdomastix {Sacatulaqa) Trntfoni Alexander; Journ. X. Y. 

 Ent. Soc, 41 : 93. ' 



Macrotrichia on distal half of the gently ciuved vein Ri. $. L. 

 4-4.2 mm.; w. 4.8-5 mm. $. L. 5.5 nun.; w. 5.5 mm. 



(July) N. H., Mass., Ct. (Transition). 



Connecticut.— Kent Falls, July 23-24, 1931 (C. P. A.); types. 



