600 PROCEEDINGS OF THE ACADEMY OF [Oct., 



femora yellow, a little darker at the tip, tibise and tarsi dull yellow, 

 the tips of the individual segments a little darkened. Wings broad, 

 hyaline, highly iridescent, veins brown; venation (PL XXVII, fig. 31) : 

 Rs long, angled and spurred near its origin; cell 1st M-z closed; cell 

 Ml present and very deep, its petiole very short so that the cell is 

 almost sessile. 



Abdomen dull yellow. 



Holotype, 9 , White Mts., N. H. (H. K. Morrison). 



This insect agrees with argentea Doane and novehoracensis sp. n., 

 in the presence of cell Mi of the wings. The pale coloration and the 

 closed cell 1st Mi readily separate it from these species. The related 

 Rhaphidolabis flaveola O. S. has the petiole of cell Mi long, the radial 

 sector short, no supernumerary cross-vein in cell Ri, etc. 



Dicranota novehoracensis sp. n. 



Body coloration gray; size small (length about 6 mm.); wings 

 with cell Ml present. 



Male, length, 5.5-6.3 mm.; wing, 6.6-7.5 mm. 



Female, length, 6-6.5 mm.; wing, 7.8-8 mm. 



Rostrum, palpi and antennae dark brown, the flagellar segments 

 short, oval. Head brownish gray, paler around the eyes, a very 

 narrow dark brown median stripe. 



Thoracic dorsum gray with three dark brown stripes on the dor- 

 sum, the middle stripe broadest, extending the length of the prse- 

 scutum, faintly bisected by a narrow pale median line; lateral 

 stripes short, l^eginning at about midlength of the prsescutum, extend- 

 ing back onto the scutum where they suffuse the lobes; scutellum and 

 postnotum light gray. Pleurae light gray. Halteres pale. Legs, 

 coxae brown with a sparse gray bloom on the outer face, trochanters 

 yellowish brown, remainder of the legs brown. Wings light gray, 

 the stigmal spot pale brown, not completely filling the space between 

 the cross-veins in the radial cells, veins dark brown; venation: 

 Rs rather elongate, oblique; cell Mi present. The venation is figured 

 in Needham's paper, 23d Report of the N. Y. State Entomologist 

 for 1907, pi. 19, fig. 1 (as rivularis Osten Sacken). 

 Abdomen light brownish gray. 



Holotype, &, Fall Creek, Ithaca, N. Y., May 8, 1914. 

 Allotype, 9 , topotypic. 



Paratypes, 4 cf , 1 9 , topotypic, 1 cf , 1 9 , Dolgeville, Fulton Co. 

 N. Y., May 16, 1914. 



The American species of Dicranota may be separated by the 

 following key. 



