NATHAN BANKS. 25 



SlSYRlJi^M. 

 SYNOPSIS OF GENERA. 



1. Teu or more branches to radial sector; aiui a subniarginal series of cross- vein - 



lets; a recurrent vein at base; large species Polystcecliotes. 



About five or fewer branches to radial sector; no subniarginal series of cross- 

 veinlets ; no recurrent vein ; smaller species 2. 



2. Apical margin of wing plainly excised ; about five branches to radial sector. 



Ijomainyia. 

 Apical margin entire ; about two branches of radial sector 3. 



3. Radial sector with but one branch ; in hindwing the subcosta runs into radius 



much before the pterostigma diina.<'ia.. 



Radial sector with two branches; in hindwing the subcosta runs into radius 

 at the pterostigma Sisyra. 



SISYRA Burm. 



Wing entire ; the subcosta runs into the radius near pterostigma 

 in both wings ; but one radial sector ; costal area narrow at base ; 

 the costal veinlets simple ; no recurrent vein ; no gradate series, the 

 few cross- veins very irregular in position ; median vein forked 

 several times. Last joint of palpi (especially labial) much swollen. 



Type. — S. fuscata Fabr. 



Wisyra vicaria Walker. — Head shining, pale yellow; vertex hairy; an- 

 tennae pale brownish; second joint dark brown; legs pale yellow ; thorax yel- 

 low-brown; abdomen brown. Wings brown; venation dark brown; more or 

 less indication of a darker streak between the veins; hind wings scarcely dark- 

 ened, costal area dark ; venation brown. Wings in male shorter than in female, 

 rather hairy, broadly rounded at tips; narrow at costal margin at base ; costal 

 veinlets simple ; one radial sector, with four branches; no gradate veinlets, a few 

 cross-veinlets in basal part of wing; fringe short; hind wings with one radial 

 sector, with three branches. Expanse 11-13 mm. 



Specimens from near High Island, Maryland (near Washington, 

 D. C), June 17th and 25th, and July 14th ; Mosholu, New^ York, 

 September 1st ; Lake Forrest, Illinois, June; Ithaca and Saranac, 

 New York, June; also Detroit, Michigan, and Kaslo B. C. (Currie). 

 The types were from Georgia. 



Mr. Needham's S. umhratus (of which I have several co-tvpe.«, 

 kindly sent me by him) does not appear to differ in any important 

 point; it is rather larger and darker. The Mosholu specimen is 

 very dark and as small as any Washington specimen. I do not 

 have males of S. umhratus, but figure the genitalia of S. vicaria ; 

 perhaps there may be differences in this respect. 



TKANS. AM. ENT. SOC. XXXII. (4) DECEMBKK, 190;"). 



