15 
6. Proboscis at most one and one-half times as long as height of head, 
three postsutural and four sternopleural macrochetie, second 
and third segments of abdomen shining except on base of 
SEIS. foes Ad Bee ote ope a Ra a ee tf 
Proboscis three times as long as height of head, four postsutural 
and four sternopleural macrochietie, second and third segments 
of abdomen each marked with two shining black, triangular 
spots; length,5 mm. Maryland. (Trans. Amer. Ent. Soc., Vol. 
XIX, p. 129; June, 1892: Coronimyia.)........ geniculata Town. 
7. Third joint of antennz strongly concave on the front edge; length, 
5mm. White Mountains, New Hampshire; District of Colum- 
bia; Virginia, and Southern Illinois. (Trans. Amer. Ent. Soc, 
Vol. XIX, p. 128; May, 1892: Siphophyto. Siphophyto neomexi- 
canus Townsend, 1. c. Gymnopareia americana Br, and Berg. 
MSS., Brauer and Bergenstamm in litt.)...... HNoridensis Town 
Third joint of antenne strongly convex on the front edge; length, 
4 mm. Southern California. (Canadian Entomologist, Vol. 
XXVII, p. 127; May, 1895: Siphophyto.).......... setigera Coq. 
Genus SIPHONA Meig. 
Siphona Meigen, in Iliger’s Magazin fiir Insektenkunde, Vol. II, p. 281; 1803. 
Bucentes Latreille, Genera Crust. et Insectorum, Vol. IV, p. 339; 1809. 
This synonymy is given by St. Fargeau and Serville,! and repeated by 
most later authors. Our species have three postsutural and three 
sternopleural macrochetie, third vein bristly at least halfway to the 
small crossvein, two pairs of orbital bristles in both sexes, palpi and 
greater part of femora and tibix yellow: 
hae 
1. Terminal section of proboscis laterally compressed: and widened, 
at most three-fourths as long as height of head..........-. 2. 
Terminal section bristle-like, at least as long as height of head; 
abdomen opaque gray pollinose, black, the sides of the first two 
or three segments sometimes partly or wholly yellow; length, 
to6mm. Toronto, Canada; White Mountains and Franconia, 
N. H.; Beverly, Mass.; District of Columbia; North Carolina; 
northern [linois; Colorado; England, and Austria. Two males 
and one female from Austria received from Brauer and Bergen- 
stamm,and by them labeled Siphona geniculata Meig.; also three 
females from England, received from EH. Brunetti, and by him 
labeled Siphona geniculata. (Memoires servir Histoire Insectes, 
Vol. VI, p. 20; 1776: Musca. The following synonymy is by St. 
Fargeau and Serville, in Encycl. Méthodique, Vol. X, p. paket 1828: 
Stomoxys minuta Fabricius, Systema Antliatorum, p. 282; 1805. 
The following is by Meteo, in Syst. Besch. Kur. Zweit. In. Vol: 
IV, p. 154, 1824, and repeated by most later authors: Bucentes 
cinereus Latreille, Gen. Crus. Insect., A ol. LV. Daood: 1309. The 
imines clopédie Meahodiaue: Vol. X, p. 500; 1828. 
