116 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iib 



One supra-alar bristle; prealar bristles 10; dorsolateral bristles in 

 single row; scutellum with 8 large, posterior bristles in transverse 

 row; anteriorly about 40 fine, strewn bristles; anterolateral bristles 

 6 to 7. 



Leg proportions: 



Front tibial spur straight with 2 side barbs ; ratio of spur length to 

 tibial diameter at apex 42:50. Fore femiK dark with subapical light 

 band. 



Middle tibial spurs only slightly sinuate ; outer spur slightly shorter 

 than inner with 4 fiUforni teeth; inner teeth obscured. 



Hind tibial spurs with ratio 16:30, both almost straight; each with 

 3 filiform teeth; teeth on inner longer spur occupy middle one-third 

 of spur; comb of 11 bristles. 



Costal extension beyond II4+5 0.144 mm. Spot on r-m large, ex- 

 tending into cells on either side ; wing spots large and dark tending to 

 coalesce (cf. Malloch, 1915, pi. 27, fig. 5). Wing length 2.63 mm.; 

 venarum ratio 1.10. 



Genitalia with straight dististyle; fairly conspicuous median pro- 

 jection at base of basistyle. 



Material examined from California: In USNM: 1 female, Hunting- 

 ton Beach, Apr. 6, 1949. In UCR: 1 male, San Jacinto, Riverside 

 Co., Aug. 1, 1958, S. 



Male: Wing length 1.96 mm.; venarum ratio 1.06: fore tarsi missing. 



Female: Wing length 2.00 mm.; venarum ratio 1.13. 



Material examined from Indiana: 3 males. Cedar Lake, July 17, 

 1914. 



Males: Wing length, range 2.59-2.70; mean 2.64 mm. (3); fore leg 

 ratio 0.78, 0.81 (2) ; antennal ratio 2.29, 2.64 (2) ; venarum ratio, range 

 1.06-1.13; mean 1.09 (3). 



Tanypus stellatus is one of the most distinctive members of the 

 genus. It is easily recognized by its dark color; large dark wing spots 

 with the one over r-m extending broadly onto the adjacent membrane; 

 and by the straight, tapered dististyle of the male genitalia. 



Tanypus grodhausi, new species 



Figures Ag-j 



Holotype male: USNM 65518, Parks Air Force Base, Alameda 

 Co., May 28, 1959, G. 



Antennal flagellum with terminal segment darker and clearly 

 separated by articulation; antennal ratio 2.31. Postocular bristles 



