10 MR. F. WALKER ON DIPTERA COLLECTED AT 
capite argenteo, frontalibus atris, thorace non vittato, abdomine nigro 
fasciis tribus interruptis splendidissime purpurascenti-cyaneis, tibiis 
posticis fimbriatis, alis cinereis basi nigris. 
Male. Dark purplish blue; head with silvery white tomentum; fron- 
talia deep black, widening in front; antenne black; arista hardly 
pubescent ; thorax not striped ; abdomen black, with three interrupted 
brilliant purplish-blue bands; 2nd band narrower than the Ist and 
than the 3rd, excavated on each side of the hind border, 3rd band 
apical, very broad ; legs black; hind tibie fringed ; wings cinereous, 
black at the base ; prebrachial vein forming a rounded, obtuse angle 
at its flexure, hardly curved inward from thence to its tip; discal 
transverse vein hardly undulating, parted by little more than one- 
fourth of its length from the border, and by hardly more than half 
its length from the flexure of the prebrachial, which, like it, is very 
near the border. Length of the body 7 lines; of the wings 16 lines. 
Gen. Gymyosty1ia, Macq. 
31. GyMNOSTYLIA LUTEICORNIS, n. s. Fem. Nigra, cinereo-tomen- 
tosa, frontalibus atris perangustis, palpis testaceis, antennis luteis, 
thorace vittis quatuor nigris, abdomine fulvo fusiformi macula basali 
trigona, pedibus fulvis longiusculis, alis cinereis apud venas fuscescente 
' subnebulosis. 
Female. Black, with cinereous tomentum; head with bristles along 
each side of the frontalia, which are deep black, linear and very 
narrow ; palpi testaceous; antenne luteous, 3rd joint short; arista 
bare, slender; thorax with four slender black stripes ; pectus hoary ; 
abdomen tawny, fusiform, a little longer and narrower than the thorax, 
with a black triangular spot at the base, and with black spines at the 
tip; legs tawny, rather long and slender; tibie darker than the 
femora; tarsi black ; wings cinereous, very slightly brownish-clouded 
along the veins; veins black, tawny at the base, prebrachial vein 
forming a very obtuse angle at its flexure, almost straight from thence 
to its tip; discal transverse vein almost straight, parted by a little less 
than its length from the border, and by a little more than its length 
from the flexure of the prebrachial; alule white. Length of the 
body 4 lines; of the wings 7 lines. 
Subfam. SarcopHaaipeEs, Walk. 
Gen. SarcopHaca, Meigen. 
32. Sarcophaga mendax, Walk. See Vol. IV. p. 132. 
Subfam. Muscipzs, Walk. 
Gen. Musca, Linn. 
33. Musca costalis, Walk. See Vol. V. p. 159. 
