4 PROCEEDINGS OF THE NATIONAL, MUSEUM tol. 79 



10 or 12, stout; fourth with a row of discals and longer marginals, 

 the latter situated well before the hind border of segment; genital 

 segments small, retracted, reddish. 



Legs black; mid tibia with two or more bristles on outer front 

 side near middle; hind tibia with an irregular row on outer hind 

 side; claws and pul villi very small. 



Wings faintly brownish ; fourth vein with an abrupt stumpless 

 bend, arcuate beyond and reaching costa far before wing tip; first 

 posterior cell open; hind crossvein oblique to fourth, which it joins 

 nearer to bend than to small crossvein ; first vein setulose near base, 

 the third more than halfway to small crossvein; costal spine ves- 

 tigial. 



Female. — This sex has been characterized (loc. cit.), but the three 

 additional specimens show some variations that should be mentioned. 

 Front at vertex 0.37, 0.35, and 0.38 of head width ; paraf rontals only 

 faintly yellow in one, distinctly so in the other two, which have the 

 region of the vertex almost golden. Very similar to male otherwise, 

 but with the third antennal joint narrower; the intermediate ob- 

 dominal segments shining black on posterior third; fourth seg- 

 ment wholly yellow, longer, more pointed, bearing an arcuate row of 

 rather short spiny discals, with numerous weaker bristles behind 

 which become almost hairlike at the apex. First genital segment 

 tubular with a groove on either side behind, pale yellow; apical seg- 

 ment shining brownish, retracted, flattened behind and sloping for- 

 ward to tip, not fitted for piercing. 



Length, 7 mm. to 8.5 mm. 



Redescribed from one male and four females, including type, from 

 College Station, Tex., April, 1924 and 1929, and May 4, 1930 (H. J. 

 Reinhard). The type specimen (female) is in the United States 

 National Museum collection, wdiich also contains a second specimen 

 of the same sex from Ancon, Canal Zone, April 20, 1926 (C. T. 

 Greene). 



MICROSILLUS POLUNOSUS Townsend 



Siphosiurmia sp. Townsend, Ann. Ent. Soc. Amer.. vol. 4, p. 135, 1911. 

 Siphosturmia poUinosa Townsend, Proc. U. S. Nat. Mus., vol. 43, p. 321, 1912. 



I have seen the type series, including one male and four females 

 from Peru, in the United States National Museum collection. The 

 male has short claws and pul villi, orbital bristles, and the same 

 uncommonly wide front as in H. haccharis. Aldrich,^ in comparing 

 the present species with the single type specimen of haccharis^ con- 

 sidered them distinct but expressed some doubt in the absence of 

 sufficient material of the latter species for study. There are now 



' Proc. U. S. Nat. Mus., vol. 69, art. 22, p. 20. 1926. 



