82 
aratioD from Biomyia. 1 Our species have only three sternopleural 
macro chaetse, the sesond and third Beginents of the abdomen destitute 
of discal ones, second joint of antenme and the palpi, yellow: 
1. Thorax bearing only three postsutural maeroclneta' 2. 
Thorax bearing four postsutnral inacrocha3tse, middle tibiae each 
bearing only one on the front side near the middle, scutellum 
and sides of first three segments of the abdoinem black, apex of 
the fourth segment yellow, antenme two-thirds as long as the 
face: length, 11 mm. Florida. (Proc. Acad. Nat. Sei. Phila- 
delphia, p. 309; September, 1895: Masiphya.) aurigera Coq. 
2. Antenme at least three -fourths as long as the face; scutellum and 
abdomen wholly black .... 3. 
Antenme two-thirds as long as the face, middle tibiae each bearing 
two or more macrochsetae on the front side near the middle; 
apex of scutellum and sides and apex of abdomen yellow; 
length, 9 to 12 mm. District of Columbia; Maryland: Vir- 
ginia; Tii'ton, Ga.; Biscayne Bay, Fla., and Los Angeles 
Co., Cal. (Zweif. Kais. Mus. Wien. V, p. 313; 1891: Masiphya. 
Also in lift. Tachinomyia floridensis Townsend, Trans. Amer. 
Knt. Sue. Vol. XIX, p. 97; May, 1892.). brasiliana Br.and Berg. 
3. Cheeks one-fifth as broad as the eye height, front in each sex one- 
half as wide as either eye, abdomen subopaque gray pollinose, 
hind margins of the second and third segments and reflecting 
spots darker; length, 5 to 6 mm. Amherst, .Mass., and Los 
Angeles County. Cal. (Zweif. Kais. Mus. Wien. 7^.312; L891 : 
Viviania, Masicera sortycolor Townsend, Trans. Amer. Ent. 
Soc, Vol. Will, ]>. 359; December, 1891. Pseudotractocera 
calasomas Coq. MS.. Burgess in Kept. Mass. State Board Agric, 
p. 83; January, 1897.) georgiw Br. and Berg. 
Cheeks one-tenth as broad as the eye height, front of female as wide, 
as either eye: black, the palpi and apex of proboscis yellow; 
frontal bristles descending almost to apex of the second an ten 
nal joint, five pairs of orbital bristles in the female, sides of face 
at narrowest part each one-tenth as wide as the median depres 
sion. vibrissa- half the length of the second antennal joint above 
the oral margin, ridges bristly on the lowest fourth, antenme 
reaching slightly below lowest third of face, the third joint one 
and one-half times as long as the second, arista thickened almost 
to the middle, the penultimate joint as broad as long; thorax 
thinly gray pollinose, marked with four black vittae, scutellum 
bearing three long marginal pairs of macrocha-ta*, abdomen 
1 An Austrian specimen received from Brauer and Bergenatamm and by them labeled 
Viviania pacta Meig., lias the apical cross vein strongly concave, and not straight, as 
stated by these authors in Zweif. Kais. Mus. Wien, VI, p. Ill; 1893. 
