Mr. F. W. Edwards’ Notes on British Mycetophilidae. 357 
had three distinct blackish stripes, while in the seven 
specimens I have seen the thoracic stripes are completely 
fused. Lundstrém records a similar example to Dzie- 
dzicki’s from Finland. It is probable that M. wnicornuta 
is only a colour variety of M. rufilatera. The type of the 
latter is a female, but there is no doubt that the males are 
correctly associated with it. 
M. halterata, Staeg., seems to be rare. I have only seen 
females—from Crowborough, Quy, and Cambridge (F.J.); 
Colwich and Rotherfield (G.H.V.). 
Sctopuita, Mg. (Rond.), 
(Lasiosoma, Winn.). 
S. hirta, Mg. (= L. pilosa, Winn. var. a, according to 
Dziedzicki). A specimen taken 4, vi. 1902 at Cambridge, 
by Mr. F. Jenkinson, lacks the small cell on both wings, 
while another example taken 6. vii. 1908 at the same 
place by the same collector is even more remarkable in 
having the fifth vein simple (both wings). The latter 
specimen can be seen not to be a Monoclona by its uni- 
colorous yellow halteres.. Both are males, and their 
genitalia do not depart in any way from the normal struc- 
ture found in S. hirta. Hypopygium, figs. 42 and 43. 
S. lutea, Macq. (= L. analis, Winn., as Dr. Dziedzicki 
informs me). The structure of the male genitalia is the 
only sure distinction of this species, as it is very variable 
in colour. Some specimens are almost entirely yellow, 
others almost entirely blackish-brown, but even in the 
darkest specimens the hypopygium remains yellow, and 
does not vary in structure. A female from Cambridge, 
11. vii. 1906 (F.J.) has lost the small cell on the right wing 
only. Hypopygium, fig. 53. 
S. rufa, Mg. The species which I recognise under this 
name agrees fairly well with Winnertz’s description, but 
the male has black hair on the last few segments of the 
abdomen. It is the largest species of the genus in this 
country, and has been bred by Dr. Sharp and Mr. H. St. 
J. K. Donisthorpe from a Polyporus growing on birch 
trees at Rannoch. Walker’s S. ochracea may be a 
synonym, but the type appears to have been lost. 
Hypopygium, fig. 56. 
S. fenestella, Curt. This was erroneously referred by 
Mr. Jenkinson to Apoliphthisa; it is evidently a true 
TRANS. ENT. SOC. LOND. 1913,—PART II. (SEPT.) AA 
