HORSEFLIES OF THE SUBFAMILY TABANINAE 15 
Key to the Nearctic Species of Dicladocera 
1. Furcation and cross veins distinctly margined with brown__________ 2 
Fureation and cross veins not distinctly margined with brown______ 3 
2. Median callus a very slender line; hair on lateral margin of tergite 
4 white; vein Ras not broadly margined with brown 
finitima, new species, p. 15 
Median callus broadly joined to frontal callus below; hair on lateral 
margin of tergite 4 entirely black; vein Ri and other longitudinal 
veins at base of wing broadly margined with brown 
megerlet (Widemann), p. 16. 
3. Conspicuous, light gray, sublateral spots on abdomen 
scita (Walker), p. 16. 
- Abdomen without distinct sublateral spots____-_______-_-_-_-_-_-..______- 4 
4. Antenna nearly black, the dorsal process of third segment reaching 
nearly to base of annulate portion but rather short and not curved 
downward at tip; dorsum of abdomen distinctly darkened 
TOOVELO IEE MUAY cs a a aR Sa ne annularis (Hine), p. 17. 
Antenna mostly orange brown, the dorsal process extending slightly 
beyond base of annulate portion and rather distinctly turned down 
at tip; abdomen not noticeably darkened medianly 
sexfasciata, Stone, p. 18. 
DICLADOCERA FINITIMA, new species 
(Fig. 3, B) 
Rather large; dark reddish brown; a brown spot at furecation; median callus 
very slender; some white hair on lateral margins of tergites. 
Female——Length 18 mm. Hye rather densely pilose. Frons not quite three 
times as high as width at base, slightly narrower just below vertex than else- 
where, grayish brown, with white hair just above basal callus and at vertex, 
the rest black; basal callus convex, subquadrate, shiny dark brown; median 
callus a slender, indistinct line about twice as long as basal callus; a partially 
denuded brown spot at vertex, very slightly raised; subcallus brown, moderately 
swollen, with some black pile laterally. First antennal segment short and stout, 
dark brown, with black hair; second with a distinct dorsal process; third 
(missing). Clypeus and lower genae brown, with concolorous hair, blacker 
above. Hair of back of head and the postocular fringe creamy white. Second 
palpal segment moderately stout, dark brown, with black hair. 
Dorsum of thorax dark brown, the humeral lobe, prescutal lobe, intrascutal 
suture, and side behind prescutal lobe orange brown, with white hair, and white 
hair also on anterior margin of scutum and sides of scutellum; pleura, sternum, 
and legs dark brown, with brown to black hair, the hind tibial fringe well 
developed, black. Wing rather whitish basally, hyaline apically, the costal cell 
pale yellowish and fureation and crossveins margined with pale brown; cell 
R; slightly narrowed apically. 
Abdomen above reddish brown, with a median black stripe that widens poste- 
riorly, the whole dorsum rather generally covered with black hair except for 
creamy-white hairs on posterior lateral corners of second tergite and along 
whole lateral margin of tergites 3-6; venter black, tinged with reddish medianly, 
with mostly pale hair, particularly along hind margins of sternites. 
Male.—Unknown. 
Type.—Female, United States National Museum No. 51957. 
Type. locality —Jacksonville, Fla. 
The type, collected by Mrs. A. T. Slosson, is somewhat damaged, 
but since it rather obviously is closely related to megerlec (Wiede- 
mann) and at the same time is distinct, as indicated in the key, the 
species is described at this time in order to make this revision more 
nearly complete. 
