OF THE TABAXID^E OF THE UNITED STATES. 457 



dorsal sui'face of the three last segments. Legs yellowish red ; front tarsi Ijrownish. 

 Wings strongly infuscated ; a distinct brown cloud on the bifurcation of the third vein, a 

 very faint one on the crossvein at the base of the second posterior cell. Length, about 

 23 nun. 



Hah. Savannah, Georgia (Wiedemann) ; Florida (Lalvc Harney, May 4, Messrs. Hub- 

 bard and Schwarz) ; S. Carolina (Sea Islands, June 2, B. P. Mann). 1 have four females. 



The cloud on the bifurcation of the third vein is not mentioned liy Wiedemaini ; it nev- 

 ertheless exists in his original specimen in the Vienna Museum (as Dr. Redtenbacher kindly 

 informs me). The eyes of this species (as I saw them on an alcoholic specimen) have three 

 narrow bluish stripes, not reaching the external border ; the ground color of the eye was 

 reddish green. 



35. Tabanus Megerlei. 



Tabamis Megerlei Wieilemnnn, Aus. Z\v., I, p. 13i!, 3"2. 



Female. [Antenna; l)rown, root of the third joint ferruginous yellow, with a strong 

 tooth ; fixce brown, sonrewhat yellowish on the sides ; clieeks and palpi l^rown ; beard black ; 

 front yellowish white below, ligliter in the middle, the upper part 3-ellowish.] Callosity 

 nearl}' square, brown or l)lack, convex. Thorax blackish, reddish on each side, Avith whit- 

 ish lines on the dorsum ; plcurro Ijrown, witli Ijlack hair. Abdomen reddish, with a Ijroad 

 black stripe in the middle, which is somewhat narrower on the second and third segments ; 

 a whitish pollen and a golden yellow pubescence clothe the red portions of the abdomen ; 

 lateral margins blackish, fringed with black hair. Venter reddish. AVings Ijrownish on 

 the proximal half, especially along the veins ; crossveins and bifurcation of the third vein 

 with dark brown clouds. Length, 17-18 nun. 



Hah. Florida (caught by myself on St. John's River in March, 1858). A single female. 



T. Megerlei is described by Wiedemann without indication of localit3^ IMy specimen 

 agrees perfectly with his description. At present this specimen is somewhat injured about 

 the head, so that I am comj^elled to translate from Wiedemann the portion of my descrip- 

 tion enclosed in brackets. The black fringe of hair along the edges of the otherwise red 

 abdomen of this species cannot well be mistaken. Li the prespiit condition of my speci- 

 men I cannot well ascertain whetlier its eyes are pubescent oi= - fulvouc , and Avhether it has 

 an ocellar tubercle or not. 



36. Tabanus americanus. 



Tabamis americanus Forster, Nov. Spec. Contur., I, 100. 

 Tabanus phtmheus Drury, Ins. I, Tab. 44, f. '2. 



Tabanus ruficornis Fabricius, Syst. Ent., p. 789,8; Ent. Syst., IV, p. 365, 14 ; Syst. Antl., p. 96, 14.— 

 Wiedemann, Dipt. Exot., I, 62 ; Auss. Z\v., I, p. 112, 1. 



Tabanus limbalus Palisot-Beauvois, Ins., Dijit. Tab. I, f. 2. 



Female. Dark violet brown (" ohsctire cpccinellens " of Wiedemann) sometimes more 

 reddish. Face grayish, with gray hair ; front grayish ; antennae red ; in some specimens 

 the annidate portion is lirown ; third joint deeply excised ; its upper angle drawn out, as a 

 pointed horn ; frontal callus chestnut brown, prolonged in a line above ; palpi brownish red, 

 with dense, short black hairs. Thorax with a whitish efflorescence, hardly concealing the 

 dark ground color ; a tuft of white hairs between the root of the wings and the scutellum. 



MEMOIRS BOST. SOC. NAT. HIST. VOL. n. 115 



