Mr. F. W. Edwards’ Notes on British Mycetophilidae. 337 
Sciophilinae; our knowledge, however, is not yet sufficiently 
advanced for this, though . it seems probable that Acnemia 
may have arisen directly from Monoclona, and Anaclinia 
from Polylepta. In this key some new characters have been 
used, while others, such as the presence or absence of a 
subcostal cross-vein or a median ocellus, have been dis- 
carded as useless for separating genera, since they are not 
infrequently variable within the limits of a species. The 
Comstock-Needham nomenclature of venation has been 
adopted, and should readily be understood with the aid of 
the three figures of wings which are given. For the sake 
of convenience the genera are separately dealt with in the 
order in which they appear in Kertész’s catalogue, but it 
may be pointed out that this is not entirely a natural 
arrangement; for example, there is, I feel convinced, 
only a superficial resemblance between the genera Phronia 
and Hxechia; the former is closely allied to Trichonta, 
the latter to Rhymesia. 
Several papers, containing figures of the hypopygia 
of very many of our species, have recently been issued, 
and the student of British Mycetophilidae will find these 
absolutely indispensable. The most important are as 
follows :— . 
Dzarepzickt, H. [On the genus Mycetophila, ete.] Pam. 
Fizy]., Warsaw, tom. iv, pp. 298-324, pls. v-ix (1884). 
[On Boletina, Sciophila, etc.}. Pam. Vizy]:, tom. v, 
pp. 164-194, pls. iv-ix (1885). 
Revue des espéces européennes du genre Phronia. 
Horae Soc. Ent. Ross., 23, pp. 404-532, pls. xn—xxi 
(1889). 
Zur Monographie der Gattung Rymosia, Winn. Horae 
Soc. Ent. Ross., 39, pp. 89-104, pls. i-vi (1910). 
Lunpstrém, C. Neue oder wenig bekannte europiische 
Mycetophiliden. Ann. Mus. Nat. Hung., 1911, 
No. ix, and 1912, No. x. 
Beitriige zur Kenntniss der Dipteren Finlands. Acta 
Soc. pro Fauna et Flora Fennica, Helsingfors. Vol. 
207 Nox I (1906);;* vol) 32,-No.'2 (1909) : vol. 36, 
No. 1 (1912). 
Lanprock, K. Neue oder seltene Mycetophiliden aus 
Mahren. Wien. Ent. Zeit. 1912, pp. 27-39. 
Neue oder wenig bekannte Pilzmiicken. Wien. Ent. 
Zeit. 1912, pp. 175-185. 
