448 C. R. OSTEN SACKEN'S PRODROME 



This species is distinguished by its slender form and elongated abdomen. Species closely 

 competing in length seem, however, to exist in the South, -which, in some cases, may render 

 its recognition doubtful. 



I have seen a specimen from Florida (Ft. Capron, March 2G ; Messrs. Hubbard and 

 Schwarz) only 11 millim. long, of a purer, almost whitish gray ; markings of the abdomen 

 very distinct; oblique spots on second segments in contact with the hind margin, those of 

 the third nearly so ; costal cell subhyaline ; front rather broad, etc. It seems to be a differ- 

 ent species. 



Two specimens from Texas ("Waco, Belfrage, in Mr. Burgess's collection) are more red- 

 dish in color ; there is a faint brownish cloud on the bifurcation of the third vein, etc. 

 They also seem to belong to a different species. 



22. Tabanus pumilus. 



Tubanus 2^iimiit(s M-acquavt, Dipt. Exot., I, 1, p. 146, 51. 



Female. Palpi stout, whitish, with some black hairs ; face grayish white ; front brown- 

 ish gray, convergent anteriorly ; callosity brownish or black. Antennte reddish ; third 

 joint remarkably broad and comparatively short ; its annulate portion short and stout, 

 sometimes infuscated. Thorax blackish gray, with white lines, sometimes reddish on the 

 sides. Abdomen blackish, segments with white hind margins, expanding into small trian- 

 gles in the middle (often obsolete) ; on each side of these triangles oblique oval white spots, 

 not coalescent Avith the hind margins ; the sides of the abdomen often appear reddish 

 (especially when denuded). Legs pale reddish yellow, clothed with whitish pollen and 

 white hairs ; tips of tibisG brown ; tarsi brown, base of the four posterior ones paler. Wings 

 hyaline ; stigma pale brown ; first posterior cell broadl}^ open. Length, 84-10 ram. 



3IaJe. Head very large and broad ; division between the large and small facets very 

 marked. Third antennal joint less broad ; its annulate portion more drawn out in a point. 

 Abdomen reddish brown, the intermediate, triangular white sj^ots almost obsolete, etc. 

 (As I have only a single, somewhat damaged specimen, I refrain from a more detailed 

 description.) Length, 10 mm. 



Hfth. Middle and Southern States (Maryland ; West Point, N. Y. ; Enterprise, Fla., May 

 11-13, by Messrs. Hubbard and Schwarz). Seven females and one male. 



T. pumilus will be very easily distinguished by its small size, the peculiar broad shape of 

 the third antennal joint, the convergent front of the male, etc. 



Macquart says : " deuxieme cellule sous-marginale ordinairement appendiculee." Two of 

 my specimens indeed show a vestige of a stump ; but tliis seems to be an exceptional case. 



23. Tabanus lineola. 



Tabanus Uneola Fnbriciiis, Entom. Syst., IV, p. 869, 33; Syst. Antl., p. 102, 41.— Coqucbevt, Illustr. Icon., 

 p. 112, Tab., XXV, f. 6.— Wiedemann, Dipt. Exot., I, p. 81, 36; Auss. Zw., T, p. 170, 89.— Hanis, Ins. 

 N. Engl., 3a edit., p. 602, fig. 262.— Palisot-Beanvois, Dipt., Tab. II (somewhat doubtful). 



Tabanus simulans Walkei', List., etc., I, p. 182. Nova Scotia. 



? Tabanus scutellaris Walker, Dipt. Saimdersiana, p. 27. 



Female. Palpi rather stout at the base, 3'ellowish white, beset with short black hairs ; 

 face white, with white hairs ; subcallus grayish yellow ; front dark yellowish gray, distinctly 



