Mr. F. W. Edwards’ Notes on British Mycetophilidae. 345 
pseudohybrida, Landr., the middle joints of the front tarsi 
of the female are distinctly thickened. 
B. saundersvi, Curt. This species has been erroneously 
referred to as synonymous with B. hybrida (= fusca), even 
Landrock in his recent monograph of the genus assigning 
that position to it. In reality it belongs to the cinerea 
group, and differs from B. cinerea in the long hairs of the 
male antennae and in the genitalia of the male. It is a 
fairly common ss ge Hypopygium, fig. 2 
B. cinerea, Mg. Mr. A. EH. Cameron, ‘of Manchester 
University, has sent me larvae of this species from Man- 
chester and from Delamere Forest. In the latter case they 
were feeding on a decaying Agaricus; “‘ the larvae pupated 
Nov. 29th and following “days, and the imagos began to 
emerge December 3rd.” 
Macrocera, Mg. 
1. Wings microscopically pubescent ‘ 2. 
Wings distinctly pubescent when viewed eheswen a ae 8. 
2. Wings quite unspotted ; 3. 
Wings with at least a central dark seb: 5. 
3. Hind margins of abdominal segments aarapicentsle janes 
than the basal portions. 
Hind margins of abdominal es not lighter than the 
basal portions : 3 ‘ lutea, Mg. 
4, Large species ; hind coxae any a ane phi antennae somewhat 
thickened at the base . -.  . fasciata, Mg. 
Small species; hind coxae Pata Bp spot; antennae not 
thickened. .  ; we. a pusilia,, Mig. 
5. Wings with dark central Markinas athe cs Dae aon meena 8 
Wings with dark central markings anda dark apex .  . 7. 
6. Wings with a small central spot only; resembles M. fascia‘a 
grandis, Lundstr. 
Wings with a central fascia which reaches the costa 
centralis, Mg. 
7. Thorax with two black stripes; central fascia interrupted and 
not nearly reaching Ry+, . . : maculata, Mg. 
Thorax all yellowish; central fascia japon but uninterrupted 
and reaching R.+. ’ ‘ angulata, Mg. 
8. Wings with a dark central fae nad ae apex phalerata, Mg. 
Wings without distinct dark markings except at the tip of R, 
stigma, Curt, 
