304 DIPTERA 
bristles on the middle femora ; hind metatarsi brown; veins light 
brown, wings not clouded; pollen of the front extending to the 
ocelli ; 25520 V eis lc sce C EL EUG 
Hind tibie not pectinate; about eight flexor bristles on the hind 
femora C; a single preapical bristle on the middle femora; 
Sr. PECTINIGER, Melander. 
metatarsi yellow; veins dark, wings lightly clouded in the 
middle; front pollinose only near the antenne. . . . . . . Sr. PAUCISETA, nov. sp. (1). 
Geographical distribution. 
1. Si. celeripes, Meigen, Syst. Beschr. Vol. 6, p. 343 [1830] (Tachydromia); C. Europe. 
ibidem, Vol. 7, p. 95 [1838] (Tachyfesa); Neuhaus, Dipt. March. 
p- 75 [1886] (Drafetis). 
flavipes, Winthem, in litt, Meigen, Syst. Beschr. Vol. 6, p. 343 [1840] 
(Agatachys). 
2. St. curvipes, nov. sp. Wisconsin. 
3. St. graminum, Fallen, Empid. p. 15 |1815] (Tachydromia); Meigen, Syst. Europe. 
Beschr. Vol. 3, p. 72 [1822] (Tachydromia); Haliday, Ent. Mag. 
London, Vol. r, p. 161 [1833] (Tachyfesa); Walker, ibidem, Vol. 3, 
p. 180 [1835] (Tachyfeza) ; Meigen, Syst. Beschr. Vol. 7, p. 95 [1838] 
(Tachyfesa); Zetterstedt, Dipt. Scand. Vol. rz, p. 320 [1842] (Tachy- 
pesa); Walker, List Dipt. Brit. Mus. Vol. 3, p. 507 [1849] (Tachy- 
dromia) ; Zetterstedt, Dipt. Scand. Vol. 8, p. 3o11 [1849] (Tachypesa); 
Scholz, Zeitschr. Ent. Breslau, Vol. 5 (19), p. 59 (1851); Walker, 
Ins. Brit. Dipt. Vol. r, p. 136 [1851] (Drafetis); Loew, Neue Beitr, 
Dipt. Vol. 6, p. 43 (1859); Bonsdorff, Finl. tváv. Ins. Dipt. Vol. 1, 
p. 154 [1861] (Tachypesa) ; Schiner, Fauna Dipt. Austr. Vol. t, p. 95 
[1862] (Drafetis); Raddatz, Arch. Ges. Freunde Naturg. Mecklemb.- 
Rostock, Vol. 27, p. 44 [1873] (Drafetis); Lundbeck, Dipt. Dan. 
Vol. 3, p. 262, f. 118, 119 (1910); Wahlgren, Ent. Tidskr. Vol. 31, 
p. 87 (1910); Dahl, Fauna Chorin, 465 (1912); Frey, Acta Soc. Sc. 
Fenn. Helsingfors, Vol. 37 (3), p. 71 (1913). — PI. 4, Fig. 37. 
var. Becheri, Dahl, Sitzgber. Ges. Naturf, Freunde, Berlin, p. 362 [1999] (Tetra- Germany. 
neurella); Fauna Chorin, p. 465 (1912). 
4. St. lunata, Walker, Ins. Brit. Dipt. Vol. 1. p. 136, pl. 5, f. 3 [1851]. C. Europe. 
(Drapetis); Loew, Neue Beitr. Dipt. Vol. 6, p. 43 (1859); Schiner, 
Fauna Dipt. Austr. Vol. 1, p. 95 [1862] (Drafetis); Mik, Wien. Ent. 
Zeit. Vol. 19, p. 145, note (1900). 
femorata, Heeger, Sitzgber. Akad. Wiss, Wien, Vol. 9, p. 779-781, pl. 55, 
f. 1-5 [1852] (Hemerodromiía). 
5, St. obscurifbes, Adams, Kansas Univ. Sc. Bull. Vol. 3, p. 156 (1905). Rhodesia. 
6. St. pauciseta, nov. sp. E. United States. 
(1) Stilpon pauciseta, nov. sp. — Male. Length : mm. Shining black, the abdomen more piceous, legs entirely 
yellow, Front pollinose only near the antennz, mouthparts yellow, the palpi with a conspicuous black bristle, basal joints 
of the antennze yellow, the apical joint small, dusky, the long arista microscopically but closely hairy. ^ Notal hairs rather 
long; pleurze pollinose in back. — Last segment of the abdomen with a loose fringe of long black hairs, pygidium large, 
lightly pollinose below, apically with a pair of long thin clavate plate-like valves, devoid oflong hairs. Front femora ciliate 
apically, middle femora beneath near the middle with a row of yellow thorn-like setulz and preapically with one or two black 
bristles, middle tibiae with a close row of black thorns along the outer three-fifths, hind femora with a loose row of about 
eight strong flexor bristles, hind tibize not pectinate, Halteres black, Wings with a light infumation, veins dark, the 
second, third and fourth sections of the costa proportioned ::0.7 : 0.8, fourth vein nearly straight, posterior crossvein 
nearly perpendicular, sections of the fifth vein proportioned 1 : o.9, marginal cilia nearly as long as the posterior crossvein. 
Female. Abdomen more or less testaceous. Halteres yellow to brown, hind femora with a few flexor hairs, legs 
otherwise devoid of the sexual ornamentation along the flexor side. 
Seven specimens, Dorchester County, Maryland (H, S. Barber) and Woods Hole, Massachusetts, July. 
