HORSEFLIES OF THE SUBFAMILY TABANINAE 123 
Type.—Female; collection unknown, originally in “Mus. Dom. 
Bosc.” 
Type locality —‘America boreali.” 
Distribution —Atlantic States from Maine to Florida and Gulf 
States to Texas. February 11 (Paradise Key, Fla.) to October 15 
(Galveston, Tex.). In the United States National Museum, 363 
females, 24 males. 
Krober (10, p. 344; 11, p. 293) recognized as Tabanus lineola Fa- 
bricius a well known Neotropical species which has hitherto been called 
T. trivittatus Fabricius or 7’. trilineatus Latreille. While the original 
description of 7. lineola or Coquebert’s illustration is not sufficient 
to make determination positive, the fact that the type locality is 
North America prevents the name from being applied to a strictly 
Neotropical form, as Kroéber has done. In the abundant material of 
this group from South America and Central America the writer has 
not found the Nearctic species described here nor has he seen the 
species called lineola by Krober in the Nearctic region. It is reason- 
able to suppose, as Osten Sacken did, that Fabricius had the species 
here described, since it agrees well with the Coquebert figure and is 
one of our commonest species. 
Hine recognized as Tabanus quinquevittatus Wiedemann speci- 
mens which the writer has studied and which appear to be no more 
than specimens of /ineola with the blackish-brown color reduced and 
the yellowish brown more extensive. In these specimens, principally 
from Louisiana and Texas, there is a decided tendency for the frons 
to be shghtly wider, the sublateral pale stripes of the abdomen 
slightly straighter, and little if any black hair on the sixth sternite. 
It is possible that this might be given varietal status, but very ques- 
tionable that it is the same as 7. qguinquevittatus Wiedemann 
(p. 167). 
TABANUS LINEOLA variety SCUTELLARIS Walker 
Tabanus scutellaris Walker, Insecta Saundersiana, Diptera, v. 1, pp. 27-28, 1850. 
Tabanus lineola Hart, Ill. State Lab. Nat. Hist. Bull. 4: 285-236, 1895; Hine, 
Ohio State Acad. Sci. Spec. Papers 5: 51-52, 1903; Ohio Nat. 5: 240, 1904; 
Schwardt, Ann. Ent. Soc. Amer. 24: 409-416, 1931; Philip, Minn. Agr. Expt. 
Sta. Tech. Bull. 80: 32, 109, 1981; Rowe and Knowlton, Canad. Ent. 67: 
242-2438, 1935. 
Female and male.—This variety differs from the typical form in having the 
posterior half of the scutellum reddish brown. It is the common inland form. 
Type—Female, probably in Hope Museum, Oxford. 
Type. locality — ‘Bolton, North America.” 
Distribution —British Columbia to Ontario and Massachusetts and 
south to Arizona, Louisiana, and Georgia. March 3 (Dallas, Tex.) 
to September 22 (Medora, Kans.). In the United States National 
Museum, 131 females, 38 males. 
TABANUS TRUQUII Bellardi 
(Fig. 58, 4) 
Tabanus truquii Bellardi, Saggio ditterologia messicana, pt. 1, pp. 64-65, 1859; 
Hine, Ohio Nat. 7: 28, 1906. 
Rather small; abdomen with a median white stripe; wing hyaline; eye pilose ; 
palpus not unusually slender. 
Female.—Length 14 mm. Eye with sparse, short pile. Frons yellowish gray, 
with black hair, somewhat browner across middle, about four times as high 
as wide, with parallel sides; basal callus orange brown, subquadrate, not 
