OF THE TABANID^ OF THE UNITED STATES. 431 



disli frontal callus, the long annulate portion of the antennce, the broadly open first poste- 

 rior cell, the front coarctate anteriorly, etc. In some specimens the brown clouds along 

 the longitudinal veins are almost evanescent. 



The eyes of the female have two purplish green stripes, the lower one bending towards 

 the upper one near the end ; their broad interval becomes broader externally. 



I have three specimens, one labelled Western States, the second Northern States, the 

 third, Illinois, which, besides almost obsolete clouds on the wings, have the third antennal 

 joint brownish, except at the base. In the plastic characters of the head, and in the broad 

 opening of the first posterior cell, they resemble the typical specimens. I refer them to 

 this species with a doubt. 



Wiedemann's description is rather indefinite, but with the aid of some additional informa- 

 tion about the typical specimens in Vienna, kindly communicated by Dr. Eedtenlmcher, I 

 believe I have fully identified this species. 



T. fusconervosus Macq. (without locality) may be this species, but the description is too 

 incomplete for identification. 



2. Tabanus fronto n. sp. 



Female. Palpi reddish, densely clothed with minute black hairs, which give them a 

 brownish appearance ; face yellowish gray, cheeks with yellow pile ; antennae ferruginous ; 

 basal joints clothed With, minute black hair ; the upper angle of the third joint sharp, pro- 

 jecting but not drawn out in a point ; the annulate apex of the third joint about half the 

 length ot the body of the joint, or a little less; front yellov/ish gray, with a brownish spot 

 in the middle; nearly parallel, and rather broad; callus broad, nearly square, chestnut 

 brown, prolonged in a narrow line aljove. Thorax with a grayish pollen, forming longitud- 

 inal stripes ; the reddish brown or broAvnish red ground color is distinctly visible between 

 them; scutellum of the same color with the thorax, but covered with a grayish pollen. 

 Pleurae yellowish gray, with blackish hairs in the middle. Abdomen brownish, with a whit- 

 ish spot in the middle of the first segment, and with whitish triangular spots on segments 

 2-6 ; these triangles are smaller than in T. furbidus ; they are nearly of the same size, 

 except those on the last segments, which are somewhat smaller ; incisures whitish, the white 

 border being broader on the sides. Venter brownish, reddish near the basis and with broad 

 w^hitish incisures. Legs brownish red ; the ends of the front tibia?, the front femora and 

 tarsi brown ; the tip of the four posterior tarsi are more or less iufuscated ; the four poste- 

 rior femora are beset with black hairs, which give them a darker appearance. The wdngs 

 have a yellowish brown tinge, more saturate on the basal half ; the crossveins at the base of 

 all posterior cells, and the bifurcation of the third vein, are marked with large dark brown 

 clouds; distal end of the first posterior cell distinctly coarctate. Length, 17-18 mm. ; some 

 specimens much smaller. 



Hah. Georgia (James Ridings). Five female specimens. 



This species may perhaps be confounded with T. trijtmcius ; the latter is easily distin- 

 guished however, by the ferruginous front tibise, not brownish at tip, the dark brown frontal 

 callus ; the dark brown scutellum, margined wdth red behind, etc. Tlie average size of T. 

 trijuncius is larger, its general coloring, including the wings, is darker ; the white abdom- 

 inal triangles are larger ; the brown spots on the wings are smaller ; at the base of the 



