242 The Ohio Naturalist [Vol. V, No. 2, 



The black palpi is a character it shares with sequax but the 

 denuded subcallus and the black unspotted abdomen easily dis- 

 tinguish it. The costal cell is also much blacker than in the last 

 named species. 



Tabanus productus n. sp. Female: Length 11 millimeters. 

 Antenuce black, first segment rather long and narrow, third not 

 much excised above and with a small basal prominence ; frontal 

 callosity square, black and as wide as the front with unconnected 

 square black spot above it; front rather wide slightly narrowed 

 anteriorly and clothed with gray pollen ; face and cheeks covered 

 with gray pollen and white pile, palpi white with white bairs and 

 also some that look black from certain views; eyes naked. Tho- 

 rax dark with narrow gray stripes above and white pile on the 

 sides and beneath; legs black except about one-third of front 

 tibiae and more than half of the other tibiae which are white ; wings 

 hyaline with clear brown stigma and veins and with a long 

 oijlique sttmip at the base of the anterior branch of the third vein. 

 This stump has a direction which is nearly parallel with the last 

 section of the posterior branch of third vein. Abdomen dark 

 with a middorsal gray stripe and on each side a series of some- 

 what oblique spots joining one another end to end, thus forming 

 a stripe with the outer border serrate ; posterior margins of the 

 segments both above and beneath narrowly whitish. 



Male: Length 1 1 millimeters. Colored in detail like the other 

 sex; line of separation of large and small facets of the eye distinct. 



Specimens taken near Lander, Wyoming, at an elevation of 

 from 5000 to 7000 feet the past summer by R. C. Moodie of 

 Lawrence, Kansas. 



This species looks some like lineola but is smaller, the legs and 

 antennae are darker and the distinctive stump on the anterior 

 branch of the third vein differs from what I have observed in that 

 species. 



Tabanus punctifer Osten Sacken. Distributed over a great 

 deal of the western country, especially from Colorado to Cali- 

 fornia and southward. The general black color of the body 

 except the thorax, which is covered with white pile and the white 

 base of the anterior tibiae, makes it the easiest western species to 

 distinguish. Length 19 to 22 millimeters. 



Tabanus rhombicus Osten Sacken. Osten Sacken described 

 this species in his ''Prodrome" and later in his "Western Dip- 

 tera" gave additional notes upon it. At the time of the latter 

 writing, he had better material than when he first wrote, and 

 from this material he characterized three forms, as he called 

 them, which when arranged in series appear quite distinct from 

 one another; and present characters by which in good specimens 

 they can be separated readily. 



