Jan., 1914.] Tabanus Longus, Fulvulus and Sagax. 227 



1. Female. Front and face yellowish pollinose, the latter 

 with numerous yellow hairs, frontal callosity shining dark brown 

 with an unconnected elongate shining spot well above it, antenna 

 yellow except the annulate portion of the third segment which is 

 black; basal portion of the third segment with a well marked 

 anlge above. Front narrow, sides nearly parallel. Thorax 

 yellowish gray pollinose concealing the ground color, wing hyaline, 

 costal border dilute yellowish as far as the stigma; legs in large 

 part yellowish, all the femora dark nearly to apex, apical part of 

 each front tibia and whole of each front tarsus dark, extreme 

 apex of each of the other tibiae slightly brownish, all but the base 

 of each of the other tari brown. The legs may vary however and 

 in some specimens before me are almost entirely yellowish, other 

 specimens are intermediate in this respect. Abdomen dark 

 brown and yellow or black and yellow, middorsal stripe well 

 marked, widened on the posterior margin of each segment, a row 

 of spots on either side, each spot well defined and more or less 

 surrounded by dark brown or black. Length 13-16 mm. Speci- 

 mens from District of Columbia, Kentucky, North Carolina and 

 Tennessee. This appears to be the form that Osten Sacken 

 considered as fulvulus in his Prodrome. 



2. Female. This form differs from the above mainly in the 

 greater intensity of color, the yellow is golden and the dark is 

 nearly black. On the abdomen the row of spots on either side 

 of the middorsal stripe takes more or less the form of a zigzag 

 stripe on account of each spot reaching the hind border of its 

 respective segment. Length 13-15 mm. Specimens from St. 

 Simon's Island, Georgia and from Raleigh, North Carolina. 



3. Female. Colors paler than in either of the two forms 

 given above, and the size is less. Specimens are decidedly gray 

 in general appearance, the lateral rows of abdominal spots are 

 small and distinct and surrounded by hght brown, while the 

 frontal callosity instead of being nearly black is a sort of faded 

 brown. Length about 12 mm. Specimens taken at New Roads 

 Louisiana. At the time specimens were taken it was the only 

 fonn observed and it appeared to be plentiful. Niimerous exam- 

 ples were procured. 



4. Female. Size about the same as number 3, altho some 

 specimens are smaller and more slender. The pale legs and en- 

 tirely yellow antennae are most characteristic for this form. The 

 coloration of the body in general is something like specimens of 

 nimiber 1. Length 10-13 mm. More than a dozen specimens 

 from various localities in Louisiana and Georgia. 



Tabanus longus Osten Sacken. Middorsal abdominal stripe 

 very narrow and abbreviated behind in most specimens, spots in 

 the lateral rows small but distinct. Front in the female wider 

 than in the same sex of fulvulus, widest at vertex and gradually 



