Mr. F, W. Edwards’ Notes on British Mycetophilidae. 349 
species, e.g. P. senurufa and P. nigricornis, have practically 
no bristles except on the coxae. Apemon is therefore not 
adopted in this paper. As Strobl suggests, P. marginata 
is very likely only a variety of P. atrata; I am unable to 
confirm the latter as British, unless this is the case, 
Hypopygium, fig. 5. 
*P, macroeera, sp. n. ¢. 
Fusca ; antennis thorace cum capite duplo longioribus ;  alis 
subinfuscatis, immaculatis ; vena anali marginem atlingente. 
Head and thorax blackish-brown, somewhat shining; small 
yellowish shoulder-patches in front of the mesonotum. Abdomen, 
including hypopygium, dark brown. The abdomen is unusually 
long and thin, for a Platyura, and the hypopygium (figs. 7 and 8) has 
a quite unusual structure. Antennae, palpi and legs, dark brown, 
femora somewhat lighter; front tibiae and metatarsi equal in length, 
Antennae twice the length of the head and thorax together. Wings 
(fig. 8a) somewhat infuscated, but quite unmarked. Halteres 
long, whitish, knob small, black. Length (without antennae) 
omm. 
Two males of this interesting species were taken at 
Aviemore, Inverness, by Lt.-Col. Yerbury, on August 
10th, 1911, and presented by him to the British Museum, 
Another male was taken by the same collector at Nethy 
Bridge, 19. vit. 1905, and is in Mr. Collin’s collection. The 
species is sufficiently distinguished from all the other 
members of the genus by the long antennae, suggesting 
Macrocera. In fact, it is difficult to decide in which of 
the two genera the species should be placed, though on 
the whole it would seem to go better in Platyura, on account 
of the venation, which bears a close resemblance to that of 
P. flava and P. nigricauda. 
*P, biumbrata, sp. n. 
Fusca ; thorace flavo brunneo-trivittato ; abdominis incisuris, 
coxis, pedibus, halleribusque flavis ; alis apice fuscis, umbraque fusca 
in vena postica ; vena anali marginem posteriorem attingente. 
36: Head black above, front yellowish; palpi dark brown; 
antennae black, the two basal joints yellowish. Thorax dingy 
yellowish, with three separate dark brown stripes. Abdomen dark 
brown, the posterior borders of segments 1—5 yellowish. Hypopy- 
gium as in fig, 9. Legs yellow tarsi and tibial spurs dark; front 
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