118 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



Springs, Inj^o Co., May 29, 1955. In CBPH: 12 males, 16 females, 

 Parks Air Force Base, Alameda Co., May 28, 1959; 2 males. Lake 

 Elsinore, Riverside Co., May 13, 1949, E. Meyers. In KU: 3 males, 

 Little Lake, D. E. Hardy, July 25, 1940. 



Males: Wing length, range 2.18-3.33; mean 2.68 mm. (23); fore leg 

 ratio, range 0.70-0.90; mean 0.80 (23); hind leg ratio, range 0.74-0.85; 

 mean 0.79 (15); antenna! ratio, range 1.83-2.25; mean 2.01 (16); 

 venarum ratio, range 1.02-1.15; mean 1.06 (17). 



Females: Wing length, 2.37-3.85; mean 3.11 mm. (21); fore leg 

 ratio, range 0.65-0.73; mean 0.68 (19); hind leg ratio, range 0.73-0.85; 

 mean 0.79 (17); venarum ratio, range 1.04-1.13; mean 1.07 (20). 



This species can be distinguished from the other North American 

 members of this genus by the clump of 8 to 12 bristles at the posterior 

 end of the dorsolateral bristle row and by having only 3 spots just 

 posterior to R4+5. 



Tanypus neopnnctipennis, new species 



Figures 5a-d 



Protenthes punctipennis (Meigen) Malloch (in part), Bull. Illinois State Lab. Nat. 

 Hist., vol. 10, p. 383, 1915, misidentification of Tanypus punctipennis Meigen. 



Malloch gave what he considered to be a more complete description 

 of Tanypus 'punctipennis Meigen. After examining a series of T. 

 punctipennis determined by F. W. Edwards of the British Museum 

 (see appendix), I have concluded that Malloch's identification was 

 erroneous. 



Holot;>T)e male: In INHS: East St. Louis, III, July 18, 1906. 



Postocular bristles in single row behind eye, very fine, 16 vertex 

 bristles. Eyes with parallel-sided dorsal extensions. Palpi 3- 

 segmented, ratio 23:25:26. Antennal ratio 2.72. 



Pronotum with 14 fine lateral bristles. Mesonotum with prominent 

 tubercle light colored, strongly contrasting with surrounding vittae. 

 Supra-alar bristles 2, 1 large and 1 fine; prealar bristles 7; dorsolateral 

 bristles in single row; scutellar bristles 8 in large posterior single row; 

 16 anterior fine bristles strewn; anterolateral bristles 3 to 5. 



Wings with dark spot over r-m very small, scarcely extending into 

 cells on either side. Costal extension 0.96 mm. beyond R^+j. Wing 

 length 2.77 mm.; venarum ratio 1.00. 



Femora somewhat infuscate, each with preapical yellow annulus. 

 Length of fore tibial spur:apical tibia diameter 55:56; ratio of length 

 of spurs of middle tibia 45:44; hind tibia 65:45. Spur of fore tibia 

 with 2 slight barbs; middle, each with 3 longer filiform barbs; hind, 

 each with 2 rather inconspicuous filiform teeth; comb of 8 spines. 



Genitalia with curved dististyle; no median carina. 



