32 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



in repose exserted conspicuously from the tip of the abdomen; 

 inner forceps elongate, united to tip, in profile the posterior edge 

 straight to the apex, viewed from behind broadly triangular. Wings 

 without a costal spine ; costa, on its proximal half, with conspicuous, 

 erect, radiatmg, bristly hairs; third vein without bristles. Legs 

 black; middle tibia with one bristle on the outer front side near the 

 middle; hind tibia with two to five unequal bristles on the outer 

 surface, not extendmg far beyond the middle. 



Length, 4.5 to 5 mm. 



Type.—Msiie. Cat. No. 28151, U.S.N.M., from Pasadena, Cali- 

 fornia, April, 1915. 



Host relationslii-p.— Unknown. 



Described from the type and one other male from Santa Clara 

 County, California (Baker). Female not known. These speci- 

 mens in the National Museum, had been labeled '^decisa," but when 

 compared with the type of that species were found to be mcorrectly 

 determined. They are evidently the ones examined by Townsend 

 when ''subgenus B" of the genus Microsenotainia ^^ was proposed 

 for decisa. Townsend's decisa, however, is without C{uestion the 

 same as ruhriventris Macquart, and differs widely from the two 

 California specimens described above. 



SENOTAINIA TRIUNEATA (Van der Wulp) 



Miltogramma trilineata Van der Wulp, Biol. Cent.-Amer. Dipt., vol. 2, 



p. 89, 1890. Type locality, Presidio, Mex. 

 Arrenopus americanus Brauer and Bergenstamm, Denkschr. Akad. Wicn., 



vol. 58, p. 361, 1891. Type locality, Georgia. 

 Miltogramma argentifrons Townsend, Trans. Amer. Ent. Soc, vol. 18, p. 357, 



1891. 

 Millogramma cinerascens Townsend, Trans. Amer. Ent. Soc, vol. IS, p. 358, 



1891. 

 Senotainia trilineata Coquillett, U. S. Bur. Ent., Tech. Ser., No. 7, p. 81, 



1897. — Smith, Ins. of New Jersey, p. 778, 1909. — Johnson, Bull. Amer. 



Mus. Nat. Hist., vol. 32, p. 72, 1913.— Walton, Troc. U. S. Nat. Mus., 



vol. 48, p. 182, 1914. — Aldrich, An. Ent. Soc. of Amer., vol. 8, p. 82, 



1915.— Gibson, Ent. Soc. Ont. Rept. 1919, p. 127.— Reinhard, Ent. 



News, vol. 30, p. 284, 1919. — Cole and Lovett, Proc. Cal. Acad. Sci., 



vol. 11, p. 301, 1921.— Brimley, Ent. News, vol. 33, p. 25, 1922.— Curran, 



Can. Ent., vol. 55, p. 174, 1923. 

 Euselenornyia peruviensis Townsend, Proc. U. S. Nat. Mus., vol. 43, p. 364, 



1912. Type from Peru. 



Male.— Yront at narrowest 0.24 of the head width (measurements 

 of five as follows: 0.23, 0.24, 0.24, 0.24, 0.25); frontal vitta largely 

 gray to golden pollinose; frontal rows not closely bordering the vitta, 

 separated at their middle by distance greater tlian width of either 

 parafrontal; small, black, bristly hairs on paraf rentals below orbitals, 



» Proc. U. S. Nat. Mus., vol. 49, p. 619. 



