OF THE TABANID^ OF THE UNITED STATES. 465 



ish gray, with a broad blackish longitudinal stripe in the middle. Logs black ; proximal 

 half of the tibiae more or less reddish brown. Wings tinged with brownish gray ; a shade 

 of brownish runs from the stigma across the central crossveins ; costal and basal cells also 

 with a faint brownish tinge ; first posterior cell open. 



Male. Much darker in coloring than the female. Head of moderate size ; the demarca- 

 tion between the large and small focets is hardly visible, as these facets differ in size but 

 very little. Thorax black, beset with black hair; anteriorly some grayish pollen and yel- 

 lowish hair ; longitudinal stripes obsolete ; antealar tubercle dark reddish ; pleune beset 

 with yellowish hairs, and with blackish ones in the middle ; abdomen black, often dark 

 brown on the sides of the second and third seti-ments ; white triantrles on segments two and 

 three very distinct, silvery white, that on segment four smaller, often subobsolete ; the 

 hind margins of the segments have no fringe of white hair, but a narrow border of whitish 

 pollen is visible in a certain light. Venter black or brown ; hind margins of segments 

 white. Wings with a brownish tinge, somewhat more saturate than in the female. Length, 

 14-15 mm. 



Hah. New England (Caml^ridge, Mass., in July, White Mountains, July 13, S. 11. Scud- 

 der; Sotithington, Conn., July, W. IL Patton) ; Illinois; New York; also Middle States 

 (Am. Ent. Soc). I have three males and seven females before me. 



The eyes are pubescent; in the female, however, the pubescence is very difficult to per- 

 ceive. The e\es of the female show four bright green stripes, with purple intervals of 

 nearly the same breadth. 



1 had some doubts about the identification of this species with the T. (rtsjiihis of Wiede- 

 mann ; first, because he does not mention that the eyes are pubescent, although he had a 

 male specimen, in which his pubescence is usually very distinct ; secondly, because he calls 

 the jjubesOence on the cheeks bi^oionlsh, while it is yellowish gray. Through Dr. Redten- 

 bacher's kindness I have been able to remove these doubts. He has caused Wiedemann's 

 type in the Vienna Museum to be examined, and informs me that it has distinctly pubes- 

 cent eyes, and that the hairs on the cheeks are grayish, and not brownish. 



47. Tabanus lasiophthalmus. 



Tahanus lasiop/ithahntis Macqn.irt, Dipt. Exot., I, 1, p. 143, 45. 

 TubnuKS notabilis W;ilker, List., etc., I, p. 16G. 



Female. Eyes pubescent; face yellowish white, with hair of the same color; palpi 

 rather stout, whitish yellow, with white and more or less black hair ; front rather broad, 

 slightly converging anterioily, yellowish gray, mixed with brown, and with short black 

 pile ; frontal callosity Ijlack ; Ijelow it the subcallus is usually Ijare, black, shining ; above 

 the callosity a small, denuded blackish spot, usuallj' disconnected from it, and surrounded 

 with a brownish shade ; ocellar tubercle verj- distinct, a brownish shade around it ; antennre 

 reddish, more or less black at the tip of the third joint, tlie latter with a pi-ojecting, nearly 

 rectnngidar, upper angle. Thorax grnyish black, with a shade of Ijrown ; the usual longi- 

 tudinal grayish lines, in well preserved specimens, are beset with fulvous hair ; antealar 

 tubercle somewhat reddish ; pleuraj gray, with whitish hair. Abdomen brownish black in 

 the middle, yellowish or reddish brown on the sides ; large oblique yellowish white lateral 



MEMOIES BOST. SOC. XAT. UI3T. VOL Zl. 117 



