HORSEFLIES OF THE SUBFAMILY TABANINAE 165 
Cameron is nearer ohioensis Hine. In the Hine collection are a male 
and a female compared with the types by Hine. The female appears 
to be Atylotus ohioensis (Hine) and the male A. pemeticus (Johns.). 
Notes on the type, made for the writer by John Smart, show it to be 
near pemeticus or thoracicus. Until the types can be studied further 
the name had better be left in abeyance. 
Tabanus ferrugineus Palisot de Beauvois, Insectes recueillis en Afrique et en 
Amerique, p. 221, pl. 3, fig. 2, 1805. 
Type.—Female, collection unknown. 
Type. locality —United States. 
This might possibly be Tabanus turbidus Wiedemann, but the de- 
scription and figure are not sufficient to justify making this synonymy. 
Therioplectes frenchii Marten, Canad. Ent. 15: 111, 1883. 
Tabanus frenchii Philip, Canad. Ent. 67: 93-94, 1935. 
Type.—Female, no longer in existence. 
Type locality.—Montana. 
For a discussion of this species see Philip’s paper. 
Tabanus guttatus Wiedemann, Diptera Exotica, p. 73, 1821; Wiedemann, 
Aussereuropaische zweifliigelige Insekten, v. 1, p. 138, 1828. 
Type.—Kemale, originally in Germar’s Museum in Halle. 
Type locality —America. 
Not recognizable from the description. 
Tabanus intermedius Walker, List of the Specimens of Dipterous Insects in the 
Collection of the British Museum, pt. 1, p. 178, 1848. 
Cotypes-——A male and a female in the British Museum. 
Cotype locality —St. Martin’s Falls, Albany River, Hudson’s Bay. 
It is evident that this species is an Atylotus, judging from a female 
specimen compared with the type by Hine and from information and 
a drawing supplied the writer by John Smart. The Hine specimen is 
apparently A. inswetus (Osten Sacken), whereas the information from 
Dr. Smart hardly agrees with any zmsuwetus specimens the writer has 
seen. Because there is considerable doubt about what Walker had, and 
because it falls in a difficult and variable group, the writer would 
prefer to leave it unrecognized for the present. 
Tylostypia labradorensis Enderlein, Mitt. Zool. Mus. Berlin 11:3868, 1925. 
Type.—A female in the Berlin Museum. 
Type locality—Labrador. 
Not recognizable from the description. Enderlein compares this 
with Zylostypia septentrionalis (Loew), which he presumably in- 
correctly determined, as septentrionalis lacks a stump from vein R,, a 
generic character for 7ylostypia Enderlein. 7’. labradorensis may be 
Tabanus hirtulus (Bigot) or 7. liorhinus Philip. 
Tylostypia laticornis Enderlein, Mitt. Zool. Mus. Berlin 11: 3638, 1925. 
Type—aA female in the Berlin Museum. 
Type locality—sSouthern Colorado. 
Not recognizable from the description. Enderlein compares this 
with Tylostypia lasiophthalma (Macquart), which he presumably in- 
correctly determined, as lastophthalmus lacks a stump from vein R,, 
a generic character for Z'ylostypia Enderlein. 
