OF THE TABANID^E OF THE UNITED STATES. 383 



ment ; four black longitudinal stripes are thus formed, interrupted only by tlie very narrow 

 posterior margins ; these stripes are also continued on the fifth segment, but the black here 

 prevails to such a degree that only faint traces of yellow are left between the black spots ; 

 the fifth segment thus apj)ears nearly black or brown, with a yellow, more or less jagged, 

 posterior margin ; the same may be said of the sixth segment. Venter yellow ; segments 

 3 and 4 with black lines on the sides ; the last segments blackish, with yellow margins. 

 Legs reddish ; the front pair has the second half of tihlx, and the whole tarsi, the middle 

 pair has the coxas, root of femora, knees and tips of tarsi, the hind pair the femora, except 

 a pale ring before the knees, the latter part of the tibias and the tips of tarsi, black ; hind 

 tibia) beset with black hairs. Wings : both basal cells hyaline, the brown color not occupy- 

 ing more than one-third of the first basal cell and hardly encroaching upon the second ; 

 crossband filling out the fourth posterior cell : the brown cloud, enveloping the last section 

 of the fifth vein, communicates more or less with the crossband across the fifth jDOsterior 

 cell ; the hyaline triangle between the crossband and the apical spot does not cross over 

 the second longitudinal vein, although opposite its apex, at the end of the stigma, a small 

 subhyaline dot is visible ; the apical spot is like that of the preceding species, only it occu- 

 pies a larger portion of the second submarginal cell. 



Hah. Catskill Mountain House, N. Y., July, 1874. Two females; a third one, from Ogle 

 Co., lllin., has the yellow on the abdomen more extensive in comparison to the black ; on 

 the legs, the red prevails to a greater extent, the hind femora being of that color. There 

 is hardly any difference between this species and C j^udicus in the coloring of the wings, 

 except that the apical spot is somewhat larger. 



13. Clirysops indus n. sp. 



? . The ajiical spot fills out the mnrginnl nnd first snlnnnrgiiinl cells nud invades n portion of the second 

 submarginal; the crossband does not quite reach the posterior margin, but expands somewhat towards the anal 

 angle; first basal cell almost filled out with brown, the second infascated at the proximal end only. Face and 

 flvcial callosities ferruginous ; abdomen with yellow sides and yellow triangles in the middle. 



Length, 8-10 mm. 



Female. Face, including the checks, altogether ferruginous ; only the pits existing 

 under the fltcial callosities are Ijj-owu ; the stripes of pollen, separating the cheeks, and 

 clothing the facial orbit, are fulvous ; frontal callosity and space around the ocelli, black ; 

 pollen on the front, grayish. Antenn:^ : first joint led, the second and base of the third 

 more or less tinged with reddish, the remainder black. Thorax black, with the usual 

 stripes: a grayish median stripe, margined with more distinct gray lines on each side and 

 with a Ijlackish longitudinal line in the middle ; a pair of greenish-j-ellow lateral stripes, 

 passing above the root of the wings ; a broad brown stripe between the root of the wings 

 and the humerus ; pleural 3-ellowish-gray, with yellowish hairs and a brown stripe in the 

 middle. Abdomen yellow ; first and second segments each with a square black spot in the 

 middle, coalescent along the hind margin of the first segment ; the spot on the second seg- 

 ment bears, on the hind margin, a large yellow triangle (a faint trace of a similar, but much 

 smaller, triangle, is perceptible on the black spot of the first segment) ; the third and 

 fourth segments are black, each Avith a narrow j)osterior margin, broad lateral margins, and 



