CHIRONOMID MIDGES OF CALIFORNIA — SUBLETTE, 99 



ratio, range 0.86-0.93; mean 0.91 (3); arculus to m-cu:m-cu to wing 

 tip, range 0.37-0.41; mean 0.39 (4); hind leg ratio 0.68 (1). 



This species is distinguished from related forms in the key (p. 102). 



Pentaneura (Pentaneura) seqiioiaensis, new species 



Figure 2/ 



Holotype male: USNM 65510, Stony Creek, Sequoia National 

 Park, July 13, 1947, W. 



Postocular bristles 15, in single row which begins at point medial 

 to long dorsal extension of eyes. Eye extension with posteromedial 

 border angulate; the anteromedial border rounded. About 12 clypeal 

 bristles. Antennal ratio 2.00. 



Thoracic vittae, postnotum, and sternopleuron pale brown, re- 

 mainder of thorax whitish poUinose. Prothorax with 5 fine lateral 

 bristles. Halteres white. One supra-alar bristle; prealar bristles 10; 

 dorsolateral bristles in single staggered row; scutellum with 3 trans- 

 verse rows of bristles, 12 in posterior row, 8 in median row, 3 in 

 anterior row. 



Fore tibial spur lyrate, closely resembling that of P. lyra, new 

 species; lateral bristles spatulate, ahnost as long as spine of spur, 

 giving appearance of comb. Middle leg with spurs short, subequal, 

 each with apparently 3 lateral somewhat spatulate bristles. Hind 

 leg with comb of 5 spines ; spurs short, each with apparently 2 lateral 

 bristles almost as long as spur. 



Leg proportions: 



Katio of arculus to m-cu:m-cu to wing tip 0.42. R4+5 terminates 

 distal to Cui; M terminates below wing tip. Wing membrane densely 

 haired; cross veins colorless; length of first basal cell beyond distal 

 end of second basal ceU greater than length of m-cu. 



Abdomen whitish; segments II to VI with basal one-third covered 

 with pale brown fascia. The elongate dististyle and the absence of 

 bristles on the posterior margin of the ninth tergite serve to distin- 

 guish this species. The key which follows serves to separate this 

 species from closely related Nearctic forms. 



Female: Unloiown. 



Paratype: Collected with holotype. 



Wing length 2.22 mm.; fore leg ratio 0.76; antennal ratio 2.00; 

 venarum ratio 0.89; prealar bristles 9; ratio of arculus to m-cu:m-cu 

 to wing tip 0.42. 



