4G4 C. R. OSTEN SACKEN'S PRODROME 



(7 2^ lines) given by Kirby, prove that he meant the above described species, and not T. 

 flavipes. The eyes of the female (revived on wet sand) showed four dull green stripes, the 

 upper and lower one not defined on the outside, very like the eyes of T. cincius. 



45. Tab anus cinctus. 



Tahanus ductus Fabricins, Ent. Syst., IV, p. 36G, IS; Syst. Antl, p. 97, 20; Moigen, Syst. Beschr., etc., II, 

 p. 42, 16 (where this species is erroneously quoted as European, an error corrected afterwards in the preface to 

 the third volume). — Wiedemann, Dipt. Exot, I, p. 67, 10; Auss. Zw., I, 119, 12. — Harris, Ins. New Engl, 

 3d Edit., p. 602, fig. 201. 



Male and female. Eyes pubescent ; face brownish gray, beset on the cheeks with black- 

 ish hair ; palpi black, or dark brown ; front ( 9 ) yellowish brown ; callosity chestnut brown, 

 square or semi-oval, with a black, irregular prolongation above ; ocellar tubercle very dis- 

 tinct. Thorax black, somewhat shining, beset with black hair. First three segments of 

 the abdomen yellowish red, beset with fulvous hair ; an inverted black triangle rests with 

 its base against the scutellum, and occupies with its apex the middle of the second segment ; 

 remaining segments of the abdomen deep black. Legs black. "Wings brownish. Length, 

 18-] 9 mm. 



Hah. Massachu.setts ; White Mountains, N. II. (H. K. Morrison) ; Connecticut (South- 

 ington, in July, W. M. Patton) ; Pennsylvania; Maryland (Am. Entom. Soc.) ; Georgia 

 (J. Ptidings) ; Virginia (Wiedem.). Mexico [?] (Walker, List, etc., I, p. 153). 



In the male of this species the difference between the large and small facets of the eyes 

 is hardly perceptible, and the line of demarcation between them is indistinct (at least in 

 dry specimens). The e3"es of the female show four dull green stripes, the upper and lower 

 ones of which are not distinctly defined on the outside. The pubescence on them is very 

 difficult to ascertain. This seems to be closely related to T. (rifij^llus. 



46. Tab anus trispilus. 



Tahanus trisj)ilus "Wiedemann, Auss. Zw., I, p. 150, 62. 



Female. Face j^ellowish gray, with yellowish hairs on the cheeks ; palpi yellowish, beset 

 with short, black hair ; front gray ; callus black, semi-oval, prolonged aljove in a somewhat 

 spindle-shaped line ; ocellar tubercle very distinct, reddish ; antennce red, first joint with 

 gray pollen ; the third joint black on its distal end, broad, with a salient upper angle 

 and a shallow excision. Tliorax blackish gray, with two faint longitudinal gray sti'ipes 

 and a gray line between them ; under the lens these gray stripes appear beset with 

 minute fulvous hair ; antealar tubercles reddish ; pleurte gray, beset Avith pale yellowish, 

 whitish and black hair. Abdomen grayish black (dark slate color), darker than the thorax; 

 hind margins of segments with a nari'ow whitish border, beset with a fringe of whitish 

 hairs ; in the middle of this border, on segments two to five, a very distinctly defined white 

 triangle, occupying the whole breadth of the segment ; that on segment two is the largest, 

 this segment being the broadest; that on segment five is very small, often almost obsolete; 

 there is also a small whitish spot in the middle of the first segment, under the scutellum ; 

 the lateral margins of the abdomen are whitish, and beset with white hairs. Venter whit- 



