Tabanidae of Nebraska 9 



Prevailing color of the whole body dai-k 10 



10. Abdomen with a wide middorsal brown stripe and a gray stripe 

 of about the same width on either side; length $, 12-13 mm., 



o , 13-14 mm dodgei 



Abdomen not so colored 11 



11. Subcallus denuded in the female; venter of abdomen black, 

 covered with gray pollen; dark species; length 9, 13-15 mm. 

 rhombicus 



Subcallus not denuded in the female 12 



12. Wings reddish hyaline, with no distinct fuscous on the margins 

 of the cross-veins and bif uration of the third vein ; lateral abdo- 

 minal triangles usually rounded; length 9, 13-14 mm. septentrionalis 



Wings with distinct fuscous on the margins of the cross-veins 

 and bifurcation of third vein; lateral triangles oblique; large 

 large gray species; length 9, 13-17 mm reinwardtii 



Tabanus costalis Wiedemann. Auss. Zweifl. Ins., i, 173 (1828) ; Hine, 

 Louisana Bull. No. 93, 46 (1907). 

 1848. vicarius Walker, List., i, 187. 



1855. baltimorensis Marquart, Dipt. Exot., Suppl., 34. 



This species is known as the green-headed horse fly or 

 "greenhead." Twelve S $ and ten 9 9 taken at the following 

 localities: Lincoln, Lancaster County; South Bend, Cass 

 County; Fremont, Dodge County; South Sioux City, Dakota 

 County; Fairmont, Fillmore County; Haigler, Dundy County, 

 and Harlan County, June 28th to July 31st. 



Tabanus lineola Fabricius. Ent. Syst., iv, 369 (1775) ; Hine, Louisana. 

 Bull. 93, 50 (1907). 

 1848. simulans Walker, List., i, 182. 



1856. (?) scutellaris Walker, Dipt. Saund., 27. 



1859. trilineatus (Latr?) Bellardi, Saggio Ditt. Mess., i, 63. 



This is a very common species over the state. Fifteen s $ 

 and twenty-seven 9 9 have been taken at Omaha, Douglas 

 County ; Lincoln, Lancaster County ; South Bend, Cass County ; 

 West Point, Cuming County; Fairmont, Fillmore County; 



115 



