26 
erior part has short hairs; ventral plate black; anal tube small, 
blackish. Legs black or blackish, front legs somewhat paler and 
also posterior tibiæ and tarsi slightly paler; the legs are somewhat 
robust; bristles on hind tibiæ distinet but small and fine. Wings 
clear, thick veins blackish, the others more brown; costa 0,34 of 
the wing-length, costal divisions proportionately about as 20—5 — 4; 
the fork small with a small lumen; costal cilia moderately long; 
fourth vein nearly straight but distinetly curved downwards to- 
wards the end. Halteres black. — Female. Similar to the male 
but the frons less broad, the palpi dusky and the antennæ smaller. 
Length 1 , 7 —2 mm. 
Holte 10 /8 1917, 15 A and 19 /i 1918 (Th. Mortensen); two males 
and one female. I have named this distinet species in compliment 
to Dr. Th. Mortensen who has yielded me valuable assistance in 
collecting Phorids. 
30. A. coacta n. sp. g $ . 
A species near halterata Wood but with other costal divisions 
and more bristles on hypopygium. 
Male. Frons somewhat broader than long, black, slightly grey- 
ish and slightly shining; bristles strong, inner bristle of lower row 
below the outer and a little nearer to it than to the upper supra- 
antennal; supraantennal bristles small and unequal, the lower quite 
small, the upper pair close-standing, more approximated than the 
inner bristles of the middle row. Antennæ somewhat large, black¬ 
ish or blackish brown, arista distinetly pubescent. Palpi yellow, 
of ordinary size and armature. Thorax black, slightly shining, 
pleura a little brownish, especially anteriorly; mesopleura bare. 
Scutellum with two bristles. Abdomen somewhat robust, black, 
with narrow and indistinet paler hind margins to the segments. 
Hypopygium somewhat small, at most of medium size, greyish; 
when fully exposed it is a little glossy just at the base; on each 
side there is a group of some (4) conspicuous bristles; a large 
subanal body seems always to be exposed; anal tube short, yellow. 
Legs yellow, the posterior legs may be more or less tinged with 
brownish and hind femora brownish at the end; the hairs below 
the basal part of hind femora longish and not sparse; bristles on 
hind tibiæ small. Wings brownish yellow tinged, veins brown; 
