270 The Ohio Journal of Scie?tce [Vol. XVII, No. 7, 



This species is some like Tabanus epistatus O. S., but is 

 smaller the wings are differently colored and the antennas are 

 shorter. The difference in length of the antenna in the two 

 species is largely in the basal part of the third segment. This is 

 short and wide in daeckei but elongate in epistatus. The frontal 

 callosity has a geminate appearance and is not joined to the 

 spot above in d^ckei, but is entire and joined to a linear pro- 

 longation above in epistatus. 



Tabanus petiolatus n. sp. 



Female — Eyes naked, front rather narrow, frontal callosity dark 

 brown decidedly longer than broad tapering above and continuing into 

 a linear prolongation which reaches nearly to the last fourth of the 

 front; remainder of the front and the face gray pollinose, cheeks with 

 numerous white hairs, palpi pale, proboscis dark, antenna black with 

 just a little brown at the base of the third segment, basal process of the 

 third small and acute. Thorax dark brown above with gray stripes, 

 scutellum dark on the disk but with a pale posterior margin, pleuras of 

 the thorax and the coxae gray pollinose and with some white hair. Wing 

 hyaline with a very faint brownish tinge, first posterior cell closed and 

 with a distinct petiole, anterior fork of the third vein angulate near the 

 base and with a very short fork or none. The holotype has this very 

 short fork on one side but none on the other. Front femur, apical third 

 of front tibia and front tarsus black, base of the front tibia pale, middle 

 and hind legs pale brown, femora above and tarsi dark, dorsum of 

 abdomen dark brown, nearly black, with a middorsal row of prominent 

 gray triangles and the incisures gray-margined on each side; venter 

 grayish brown, last segment nearly black and most of the other seg- 

 ments darkened at the middle. Total length, 15 millimeters. 



Holotype female and two other females taken from a horse 

 at Lecompte, Louisiana, Augusta 25, 1906. In Ohio State 

 University Collection. 



This species suggests melanoceras, but is smaller and lighter 

 colored and the first posterior cell is closed and long petiolate. 



Tabanus uniformis n. sp. 



Eyes naked; general color of the body brown with gray pollinose 

 markings, proboscis dark, palpi brown, antenna brown with more or 

 less darker color on the apical two-thirds of the basal portion of the 

 third segment which bears a short basal prominence. Thorax with 

 rather distinct stripes above, scutellum and pleuras uniformly gray, legs 

 brown throughout but in some specimens the tips of the tarsi are some- 

 what darker than the other parts; wings hyaline, cross-veins, furcation 

 of the third vein and in some specimens some of the longitudinal veins 

 margined with rather obscure brown. Abdomen brown above, slightly 

 darker towards the apex, a middorsal row of gray triangles which are 



