99 
hel 
MR. F. WALKER ON DIPTERA COLLECTED AT GILOLO, ETC. 
the tibize ; wings nearly limpid, cinereous along the costa and towards 
the tips; veins black, tawny towards the base; halteres with piceous 
knobs. Length of the body 8 lines; of the wings 12 lines. 
Fam. SYRPHIDA, Leach. 
Gen. Ertstauis, Latr. 
9. Eristalis splendens, Leg. See Vol. LI. p. 95. 
Fam. MUSCIDA, Latr. 
Subfam. Sarcopnacivges, Walk. 
Gen. Sarncopnaca, Meigen. 
10. Sarcophaga sericeo-nitens, Dol. See Vol. V. p. 158. 
; Subfam. Muscrpzs, Walk. 
Gen. Musca, Linn. 
11. Musca costalis, Dol. See Vol. V. p. 159. 
Subfam. OrtanipEs, Haliday. 
Gen. OxycrpHaa, Macq. 
12. OXYCEPHALA ALIENATA, n. s. Mas. Rufescenti-fulva, capite 
nigro biguttato, metathorace pectoreque nigris, abdomine fusiformi 
basi supra nigro, femoribus basi nigro notatis, alis fuscis dimidio 
postico cinereo. 
Male. Reddish tawny ; head with a black dot in front of the base of 
the antenne; face with two grooves; antenne almost reaching the 
epistoma; 2nd joint clavate; 3rd linear, rounded at the tip, broader 
but not longer than the 2nd; metathorax and pectus black ; abdomen 
fusiform, longer than the thorax, black above towards the base; legs 
robust ; femora marked with black at the base ; wings brown, hinder 
half cinereous ; veins tawny, discal transverse vein slightly undulating, 
parted by hardly half its length from the border and by much more 
than its length from the prebrachial transverse. Length of the 
body 7 lines; of the wings 16 lines. 
Gen. Dacus, Fabr. 
13. Dacus aBsoLurTus, n.s. Fem. Cinereus, capite fulvo, facie nigro 
biguttata, antenn;s longis arista nuda, thoracis lateribus scutelloque 
fulvis, abdomine fasciis interruptis nigris, apice plano stylato-lanceo— 
lato, alis cinereis costa fuscescente. 
Female. Black, with hoary tomentum ; head tawny ; face oblique, with 
a black dot in the groove on each side; antennz quite reaching the 
epistoma; 3rd joint very long, conical at the tip; arista bare; sides 
of the thorax, humeral calli and scutellum tawny; abdomen tawny, 
oval, with the exception of the four apical segments, which are shining 
and form a flat lanceolate style ; basal part with four interrupted black 
