NO. 2344. SUPERFAMILY TIPULOIDE A— ALEXANDER AND McATEE. 409 

 Genus RHIPIDIA Meigen. 



KEY TO SPECIES. 



1. Wiugs with an abundant pale brown or gray dotting in all the cells 2. 



Wings with the markings larger and confined to the vicinity of the veins__3. 



2. Body coloration grayish, the praescutum with a broad black median line; 



postnotum gray; wings with a heavy brown pattern along the costal 

 margin, these marks about equal in extent to the interspaces ; legs brown ; 



male antennae bipectinate R- maculata (p. 409). 



Body coloration yellowish brown, the praescutum without a broad black 

 median line; postnotum black; wings with small black spots at the base, 

 on the subcostal crossvein, origin of the sector and the stigma, these marks 

 much smaller than the interspaces; legs yellow; male antennae sub- 

 pectinate R- shannoni (p. 410). 



3. Praescutum reddish brown with narrow black lines ; pleura dull yellow with 



two narrow blackish longitudinal stripes; antennae with segments 12 and 

 13 light yellowish ; basal deflection of Cu usually far before the fork of M; 



antennae of the male subpectinate R. domestica (p. 409). 



Praescutum gray with a broad black median line; pleura grayish or plum- 

 beous, unstriped ; antennae black throughout ; basal deflection of Cui at the 

 fork of M; antennae of the male not subpectinate 4. 



4. Wings with the dark pattern beyond the origin of the sector only, a large 



rounded cloud at the origin and the fork of the sector, the large rectangu- 

 lar stigmal blotch and the radial cells largely darkened; abdomen dark 



brown, the genitalia reddish yellow ; antennae of the male unipectinate 



R. fidelis (p. 409). 



Wings with a series of about five large grayish brown blotches along the 



costal margin, two being before the origin of the sector ; abdominal tergites 



yellow, the posterior half of each segment dark brown; antennae of the 



male bipectinate ^- m/cnti (p. 409). 



The immature stages are spent beneath the bark of trees {R. 

 hryanti, U. f delis) or in decaying animal or vegetable matter. 



RHIPIDIA BRYANTI Johnson. 



Plummers Island, September 4, 1904, E. A. Schwarz and H. S. 

 Barber; Washington, District of Columbia, adult emerged May 18 

 from pupa collected May 11, 1913, by R. C. Shannon. 



* RHIPIDIA DOMESTICA Osten Sacken. 



Common; dates of collection range from February 17 to Octo- 

 ber 28 ; is often attracted to light. P. I. 



RHIPIDIA FIDELIS Osten Sacken. 



Washington, District of Coliunbia, August 28, 1882. 



RHIPIDIA MACULATA Meigen. 



Frequent ; season, July 26 to October 27 ; comes to light. P. I. 



