Genus Grabliamia . 
279 
Abdomen black, covered with black and white or dirty-white 
scales, so arranged as to make a slender median light line, 
transverse white bands mostly basal? but involving both segments, 
and on the more caudal segments are almost entirely apical, the 
distal segments being in some cases mostly white; white lateral 
spots, which are really extensions of the white scalings of the 
venter, and on most of the segments extend the whole 
length. 
Legs—coxae and trochanters light, and white scaled; femora 
white ventrally, speckled black and white dorsally, a narrow 
black ring just proximal to the tiny white knee spot; fore and 
mid tibiae white ventrally (on the hind legs this is reduced to a 
white line), speckled dorsally, a little darker near the apex, but 
the apex light, and in the hind legs there is a distinct dark band 
and light apex as on the femora; metatarsi speckled, those of the 
fore legs having light apices. On the fore legs the first tarsal 
joints are black, with basal light bands, all the other joints 
dark ; on the mid leg the first and second joints are still a little 
speckled, and have white basal bands and tiny white apical spots, 
sometimes unbanded, third and fourth joints dark : on the hind 
legs the first and second joints are dark (black), with basal and 
apical light bands, the third has a basal light band, and 'the 
fourth is light; all ungues equal and uniserrate. 
Wings clear, speckled with black and white scales, the costa 
being mostly black, and the sixth long vein white ; first sub¬ 
marginal a little longer and more narrow than the second 
posterior cell, the petiole in each case about half as long as the 
'Cell, mid cross-vein twice as long as the c supernumerary ’ and 
equal to the posterior cross-vein, which is about its own length 
distant; halteres, light stem and dark knobs. 
The leg band involves both sides of most of the joints, and in 
this greatly resembles G. curriei, the thoracic marking suggest 
G. lativiatta , but the abdominal marking is clear, in some cases 
being only clean cut lines, in others a little ragged. The types 
do not, however, suggest either species more than to indicate 
their close relationship, having a peculiarly tidy appearance 
which the others lack. 
Length .—7 • 5 mm. 
Habitat .—Fort Lincoln, N.D., U.S.A. Taken June, July, 
August.” 
