436 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



Peru, about 4,500 feet, February 4, 1910, on ground in sunny opening 

 in woods (Townsend). The female is the larger. 



In life brilliant gold-green over whole upper surface, the bright 

 vivid green predominating, the gold represented by reflections. 

 Dried specimens show this surface soHdly obscure old-gold, broken 

 only by the black frontaha, thoracic vittae, first segment of abdomen 

 and hind borders of the other three segments; with the green showing 

 in patches through the gold poUen of abdomen. Face silvery, occiput 

 leaden-silvery, parafacials and rest of head hght golden, palpi rufous, 

 antennae and legs black; wings clear, tegulae yellowish- white. The 

 inner pair of thoracic vittae extends well behind suture. 



Holotijpe.—Csit. No. 19611, U.S.N.M., female. Allotype, male. 



Genus BOLOMYIA Brauer and Bergenstamm. 



Genotype. — Mystacella violacea WvHip ^ = Exorista rufata Bigot. 



Differs from Macromeigenia as f oUows : 



Male. — Front not so produced, the frontal profile much shorter, 

 the parafacials much narrower; facial plate broadening distinctly 

 below, not subequilateral; vertex not exceeding one-fourth head 

 width. Eyes rather thickly hairy. Hind tibiae rather strongly 

 cihate, with a longer bristle near middle. Third antennal joint 

 scarcely two and one-half to three times as long as second. Cheeks 

 not over one-third eye-height. Thoracic, scuteUar, and abdominal 

 chaetotaxy same. Hind crossvein shghtly nearer to cubitus, apical 

 cell ending a little nearer to wing tip, cubitus somewhat nearer to 

 margin, apical crossvein less bowed in. No discals on intermediate 

 abdominal segments. 



BOLOMYIA VIOLACEA Wulp; Brauer and Bergenstamm. 



Length of body, 9.25 to 12 mm.; of wing, 8 to 10 mm. Ten males, 

 as foUows: One Sonsonate, Salvador, and seven Cordoba, Mexico, 

 January 31 to April 8, 1908 (F. Knab); one Tucurrique, Costa Rica 

 (Schild and Burgdorf); and one Los Amates, Guatemala, February 

 7, 1905 (Charles C. Deam). 



Differs from Wulp's description only in showing five distinct 

 thoracic vittae, the fifth extending full length of mesoscutum; and 

 often no violet tmt on the abdomen, but frequently patches sug- 

 gestive of vivid green in life breaking through the deep golden pollen. 

 The thorax and scuteUum are rather bronze-golden. Brauer and 

 Bergenstamm describe violacea as having four vittae, thorax yellow- 

 gray, and abdomen bronze-yeUow. The above males all have the 

 black hind border of abdominal segments moderately broad. Brauer 

 has declared rufata Bigot to be this species. Eurigaster commetans 

 Walker may easily be this species, but type proof is needed. 



A single female from Tehuantepec, Mexico (Sumichrast), differs 

 from the above males by having discal bristles on the intermediate 



> Biol. Cent. Amer. Dipt., vol. 2, 1890, pp. 53-54. 



