140 Kansas academy of Science. 



Resembles T. recedens Walker, but is smaller; the annulate portion of the third 

 antennal joint is shorter, not or scarcely a third of the length of the joint; the dorsum 

 of the thorax is lighter colored, the markings less distinct, the pile of the pleurae 

 less abundant, the abdomen lighter colored, etc. The abdomen is ferruginous red, 

 with a single row of rather narrow triangles; it is attenuated posteriorly, but less so 

 than in T. recedens. Wings tinged with brownish, the veins broadly and diffusely 

 clouded with brownish, the cross-veins very distinctly clouded with brown; first pos- 

 terior cell coarctate. From T. turbidus, under which it would be sought for inOsten 

 Sacken's table, and with which it might perhaps bebest compared, the nearly square 

 frontal callosity and the short annulate portion of the third antennal joint will im- 

 mediately separate it. Two specimens, Florida. 



Tabanus spakus Whitney, Can. Entom. xi, .S8. 



This species is closely allied to T. jnuitilus, and only by a careful examination is 

 one able to distinguish it in the dried specimens. I have a number of specimens of 

 T. sparus from Connecticut and Massachusetts, (July 1,) and three of T. 2}>tmihis 

 from Indiana. In all of the former the lateral whitish spots of the second and third 

 abdominal segments are broadly contiguous with the hind margins, while in the 

 latter they form on all the segments, small, oval, isolated spots. Most distinctively 

 characteristic of the two species, however, are the color-markings of the eyes, as I 

 can corroborate from the revivification of my dried specimens. T. pumilus has two 

 bright green stripes on purple ground, while in T. S2}arus the eyes are wholly light 

 green with a purjjle reflection. 



Tabanus fratellus, n.sp. 



Female: Length 8-9 mm. Abdomen with three series of isolated spots; wings 

 hyaline; antennae narrow; small species. 



Palpi slender, white, with minute black hairs. Face grayish white, with white 

 pile. Front brownish gray, convergent anteriorly; callus nearly square, black, with 

 a larger, shield-shaped, shining spot above it. Antennae blackish brown, the basal 

 portion of third joint sometimes reddish brown, narrow, only a little wider at base 

 of non-annulate portion, the angle feebly indicated. Thorax grayish black, with 

 three well-indicated narrow gray stripes; pleuroe gray, with whitish pile. Abdomen 

 black, with well-marked whitish hind borders to the segments ; segments two-five each, 

 with three small, rounded, transverse, whitish spots. Venter with grayish dust, and 

 posterior whitish hind borders to the segments. Legs black, the base of front tibife, 

 and the most of the four posterior tibise yellowish; four posterior tarsi brownish. 

 Wings hyaline, stigma brown; first posterior cell open. 



Two specimens, Washington Territory. The species closely resembles T. j)ir»n7i(S, 

 but is darker, and the antenna are much narrower at the base of the third joint, 

 with the angle feebly indicated. 



Tabanus gbacilis Wiedemann, Auss. zweitl. Ins. i, 156, 71; Osten Sacken, Cat. Dipt., 

 note 81, p. 228. 

 I recognize this species in a number of specimens from Florida. They agree 

 well with Wiedemann's description, except in the color of the antenna, which are 

 either wholly red, or with the annulate portion brown. The slenderness, pale but 

 distinct brown clouds on the veins of the wings, and general light color — lilac-red- 

 dish — throughout, will distinguish it. Osten Sacken, from an examination of the 

 faded type, compared the species with his 7\ loiuiua. From the description, indeed, 

 it seems to be nearly related to that species, though differing in the lighter color, 

 and brownish clouds on the wings. The lateral spots of the abdominal segments, in 

 all my specimens, reach distinctly to the hind margin, the only thing that prevents 



