OF THE TABANID^ OF THE UNITED STATES. 401 



This species (if it be distinct) resembles T. hicolor very much in its general appearance, 

 in the absence of a frontal callosity, in the pubescence of the eyes, etc. It is easily distin- 

 guished, however, by the whitish gray color of pectus, pleura? and front coxaj, which color 

 also appears on the cheeks and around the mouth. The third joint of the antenna? (in iny 

 two specimens at least) is slightly narrower ; the general coloring of the body, especially 

 in the female, is darker. 



41. Tab anus Rein-war dtii. 



Tabam/s Heinwardtii Wiedemann, Auss. Z\v., I, p. 130, 30. 

 Tabanus cri/t/irotcltis Walker, Ins. Saumlers, p. 25 ; Tab. II, f. 1. 



Female. Front rather broad, grayish, with a well marked brown crossband in the mid- 

 dle and a dark spot on the vertex ; frontal callosity large, nearly square, brown, prolonged 

 as a line above ; face and cheeks white, with white hair ; palpi moderatel}' stout, yellow, 

 with a grayish pollen, and short black hairs; antenna?: first and second joints reddish (in 

 some specimens almost black), with black hair ; the third black, red at base; upper angle 

 ■well marked, projecting, nearly rectangular. Thorax grayish slate color, sometimes more 

 blackish ; more or less reddish on the sides and along the suture ; the usual gray stripes 

 are well marked and beset with whitish hairs in well preserved specimens. Pleura? and 

 pectus whitish, beset with white hairs; on the pleurte a fiint reddish ground color is often 

 apparent ; a fringe of black pile between the i"Oot of the wings and the humerus. Abdo- 

 men grayish slate color, usuall}" faintly reddish on the sides ; an intermediate row of trian- 

 gular and lateral rows of oblique whitish spots ; hind margins of segments fringed with 

 short white hairs. Venter densely clothed with white pollen and short white hairs, the 

 latter especially on the hind margins of segments, the ground color being blackish, or pale 

 reddish. Legs pale reddish or yellowish, clothed with grayish pollen and white hairs ; tarsi 

 nearly black ; all the tibia? blackish at tip, front tibia? up to their middle, (in some speci- 

 mens the femora, especially the front femora, are darker). Wings subhj'aline ; central 

 crossveins, crossveins at tlie end of the discal cell, and bifurcation of the third vein, dis- 

 tinctly clouded with brown ; fr^B^t posterior cell very slightly coarctate. 



Male. Antenna? usually black, except the extreme root of third joint ; flxce and cheeks 

 graj'ish, with blackish hair; legs darker, femora nearly black; thorax blackish, Avith dense 

 blackish and gray pile ; antealar callus reddish ; abdominal markings much less well defined ; 

 white hairs on the abdomen longer ; brown clouds on the wings less well marked. The line 

 between the large and small facets on the eyes well defined, although the large facets are 

 comparatively smaller than in other species. (In life a single green stripe on purple ground 

 on the lower part of the eyes.) Length somewhat variable, the usual size 16-18 mm. ; 

 sometimes only 14 mm. My mnle specimens measiu'e about 16 mm. 



The eyes are pubescent in Ijoth sexes ; very distinctly in the male. 



Hab. Canada (Belanger, Provancher, Couper) ; Iowa (Jefferson and Dallas Counties, 

 J. A. Allen) ; Illinois ; Vermont (Bridgport, Miss A. M. Edmands) ; Virginia; Pennsylvania 

 (Am. Ent. Soc). I have ten female and three male specimens. 



The description of the legs of T. erytlirolelus Walker does not agree with this species ; 

 but Westwood's figure which is appended, the locality (Bolton, N. Amer.), and the non- 



MEMOIKS BOST. SOC. SAT. HIST. VOL. H. 



