448 C. R. OSTEN SACKEN'S PRODROME 



'rjiis species is distinguished by its slender form and elongated abdomen. S^^ecies closely 

 -oompeto g u'l K^ng th 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 26 ; Messrs. nubl)ard and 

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

 very distinct; obli(|ue spots on second segment^ 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. 



Tahamis jmmilus IMacquart, Dijit. Exot., I, l,p. 14G, 51. 



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

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

 joint reuiarkaljly Inroad and comparatively short ; its annidate portion .•-hort and stout, 

 sometimes infuscated. Thor-ax blackish gray, with white lines, sometimes reddish on tlie 

 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 with the hind margins ; the sides of the abdomen often appear reddish 

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

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

 hyaline ; stigma pale brown ; first posterior cell broadly open. Length, 8|-10 mm. 



Hale. Head very large and broad ; division between the large and small fiicets very 

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

 Abdomen reddish brown, the intermediate, triangular white spots almost obsolete, etc. 

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

 description.) Length, 10 mm. 



Hub. 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. jmmilus will be very easily distinguished l)y its small size, the peculiar broad shape of 

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



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

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



23. Tabanus lineola. 



Tabanns lineola Fabricins, Entom. Syst., IV, p. 369, 33; Syst. Antl., p. 102, 41.— Coquebert, Illiistr. Icon., 

 p. 11-2, Tab., XXV, f. 6.— Wie.leninnii,'Dipt. Exot., I, p. 81, 36; Auss. Zw., T, p. 170, 89.— llanis, Ins. 

 N. Engl, 3(1 edit., p. 602, fig. 262.— Palisot-Iieauvois, Dipt., Tab. II (somewhat doubtful). 



Tiihanus sirmdans Walker, List., etc., I, ]i. 182. Nova Scotia. 



f Tdhanus scutellaris Walker, Dipt. Sauiulersiana, p. 27. 



Female. Palpi rather stout at the base, yellowish Avhite, beset with short black hairs; 

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



