MR. WALKER OF DIPTERA COLLECTED AT MAKESSAR. 157 
head a little narrower than the thorax, with a black point on the front ; 
face blackish grey ; palpi with a black dot on each outer side ; an- 
tennae pale luteous, not reaching the epistoma; 3rd joint linear, 
rounded at the tip, about four times the length of the 2nd ; arista 
bare ; thorax with three black lines and with two short and more ex- 
terior black streaks ; metathorax black, shining ; pectus with some 
black marks on each side ; abdomen fusiform, hardly longer than the 
thorax, with two black bands near the base ; legs moderately long ; 
wings vitreous, rather long, with two narrow brown bands, the interior 
band emitting two brown streaks to the base of the wing, the exterior 
band curved, continued along the costa to the tip of the radial vein, 
the space beyond it mostly occupied by an elliptical brown patch ; 
veins black, straight ; discal transverse vein straight, upright, parted 
by more than half its length from the border, and by nearly twice its 
length from the oblique pnebrachial transverse. Length of the body 
4 1 lines ; of the wings 9 lines. 
Gen. Orta lis, Fallen. 
The two following species belong to a new group of Ortalis, and will 
probably form a distinct genus. 
193. Ortalis decatomoides, n. s. Mas. Obscure rufa, tliorace 
brevi, abdomine nigro, fusiformi, basi rufo, pedibus fulvis, femoribus 
posterioiibus basi albidis, tibiis postieis nigris, alis subcinereis, macula 
apicali fasciisque duabus nigricantibus. 
Male. Dull red ; head rather large, a little broader than the thorax, 
blackish on each side of the face ; antennae wanting ; thorax short ; 
abdomen black, shining, fusiform, red at the base, a little narrower 
but hardly longer than the thorax ; legs tawny ; posterior femora 
whitish at the base ; hind tibiae black ; wings slightly greyish, rather 
convex along the hind border, blackish at the tips, and with two 
blackish bands ; first band rather oblique ; veins black ; prfebrachial 
vein and cubital vein slightly curved and approximating towards the 
tip of the wing ; discal transverse vein straight, upright, short, parted 
by much more than its length from the border, and by full twice its 
length from the prmbrachial transverse, which is extremely short ; 
Length of the body 1± line; of the wings 2\ lines. 
194. Ortalis vacillans, n. s. Fcem. Fulva, arista pubeseente, ab- 
domine nigro postice lanceolate, alis limpidis, costa striga basali fas- 
ciisque tribus nigricantibus. 
Closely allied to D. decatomoides. Female. Taw ny, shining ; head full 
as broad as the thorax ; epistoma slightly prominent ; antenna; nearly 
reaching the epistoma ; 3rd joint linear, conical towards the tip, about 
four times the length of the 2nd ; arista pubescent ; abdomen black, 
a little longer than the thorax, lanceolate hindward ; wings limpid, 
blackish along the costa, with a blackish streak, and with three slen- 
