456 C. R. OSTEN SACKEN'S PRODROME 



T. Wiedemanni is casil}' distinguislieil from T. atratus by its smaller size, much narrower 

 front, the shape of the callosity and of the stripe aljove it, the shape of the third antennal 

 joint, which is much less excised, the brown cloud on the bifurcation of the third vein and 

 the less coarctate first posterior cell. 



From T. higtibi-is the jiresent species differs in its somewhat larger size, its less shining 

 surface, in the structure of the antennte, the shape of the callosity with prolongation, the 

 less convex subcallus and the cloud on the bifurcation of the third vein. 



33. Tab anus lugubris. 



Tabanus liiguhris Macquart, Dipt. Exot., I, 1, p. 145, 48. 



Tabanus ater ralisot-Beauvois, Ins., Dipt. Tab. II, f. 5. — Wiodcmnnii, Dipt. Exot., I, p. 74, 23; Auss. Z\v., 

 I, p. 186, 39 (ex parte). 



Female. Antennae black ; third joint long ; annulate portion especially elongate ; body 

 of the joint comparatively small, its upper angle well marked, nearly rectangtilar, l)ut not 

 drawn out. Face and cheeks black, shining, with a little brownish pollen in the middle of 

 the former, between the furrow ; palpi deep black. Front black, shining, some traces of a 

 graj'ish pollen visible on the sides, above the callosity ; the latter large, convex ; subcallus 

 also very convex, l)lack, shining. Thorax and abdomen black, shining, with a thin Itrown- 

 ish pollen ; thorax in front with some grayish pollen. Legs Ijlack. Wings uniformly black ; 

 first posterior cell perceptibly coarctate. Length, l.j-14 nnn. 



Huh. Carolina (Macquart) ; Sea Islands, South Carolina, June 2d (B. P. Mann). A 

 single female. 



The shape of the third antennal joint of this species is characteristic ; uniortunately, 

 Macquart could not describe it, as it was wanting in his specimen. Nevertheless, the 

 description leaves but little doubt about the identification. 



Palisot's short description and figure seem t o refer to this species rather than to T Wied- 

 emanni. Compare especially the side view of the very convex subcallus. Moreover, it is 

 not prol>able that Palisot, in the then existing state of descriptive entomology, woidd have 

 distinguished T. Wiedemanni ; he would have probably taken it for a small T. atratus, the 

 resemblance between the two species being very great. About Wiedemann's interpreta- 

 tion compare the ol^servation at the end of the description of T. Wiedemanni. As there 

 is a much older T. afer Rossi (Fauna Etrusca, 1790), Macquart's name must be adopted. 



34. Tabanus rufus. >«^ ^^f''' '^^^^■ 



Tahamis rufus Palisot-Bcauvois, Ins., Dipt. Tab. II, f. 1, p. 100. — Wieilcmann, Auss. Z\v., I, p. 117, 8 

 (merely a translation of Palisot's description). 



Tabanus fumipennis Wiedemann, A\iss. Zw., I, p. 119, 11. 



Female. Face reddish yellow ; palpi rather long and slender, reddish ; front rather 

 broad, parallel, yellowish brown ; callosity not longer than broad, chestnut brown, or dark 

 brown, with a spindle-shaped prolongation above. Antennaj pale red, third joint much 

 excised, its upper angle \Qvy salient and slightly drawn out forwai'd. Thorax more or less 

 brown aljove, with a delicate grayish pollen and fiiint reddish lines, more reddish on the 

 sides ; pleurae and pectus yellowish, with yellowish hair. Abdomen ferruginous reddish, 

 with a longitudmal 1)lackisli stripe, which expands posteriorly and occupies nearly the whole 



