352 Mr. F. W. Edwards’ Notes on British Mycetophildae. 
Mg., probably, and P. morio, Grz., certainly belong here. 
In all these forms the strong anal vein almost reaches the 
hind margin. 
P. nemoralis, Mg. (probably = flavipes, Mg., Curt., Ztt., 
= nana, Winn., = cincta, Winn.). The commonest species 
of the genus in this country. It is so variable in size and 
in the amount of yellow (if any) on the abdomen, that I 
feel confident that the same species has been described 
under these various names. I have mounted the genitalia 
of a number of different-looking specimens and find them 
constant (figs. 20 and 21). 
*P. zonata, Zett. (= concisa, Wik., = forcipula, Lundstr.) 
Crowborough (F.J.); New Forest (D.8.); Hast Leigh 
(G.H.V.). Walker’s type is in quite good condition, and 
answers quite closely to Zetterstedt’s description of P. 
zonata. This may be the species described by Winnertz 
as P. succincta, Mg., but as it only occasionally has the 
margin of the wing slightly darker, and as the male claspers 
are not oval, I have preferred to call it P. zonata. Hypo- 
pygium, fig. 22. 
*P. perpusilla, sp. n. 
Minuta ; thorace nigro; coxis, pedibus, halieribusque ochraccis, 
tarsis abdomineque fuscis ; alis subhyalinis, vena analt marginem 
posteriorem non atlingente. 
3. Head including whole antennae blackish; palpi dark brown. 
Thorax black, rather shining, clothed with strong black bristles. 
Abdomen mainly blackish-brown, segments 2, 3 and 4 rather broadly 
yellowish at the base. Genitalia, fig. 23. Legs: Coxae, femora 
and tibiae light yellow, tarsi and tibial spurs dark; front tibiae 
considerably longer than the metatarsi. Wings hyaline, unmarked. 
Tip of Sc, immediately above base of Rs; R.+3 very short, straight, 
considerably beyond tip of R,, the distance between the tips of R, 
and R,+, being about two-thirds of that between the tips of R,+; 
and R,+;; R,+,; entering costa at a very low angle; the costa 
does not reach the tip of the wing, but extends nearly half the dis- 
tance between the tips of R,;, and M,+,. Anal vein very much 
abbreviated. Length 2°5 mm. 
One male from Boyton, Suffolk, 19. vii.1908 (G. H. 
Verrall). Type in Mr. Collin’s collection. 
*P. aestivalis, Winn. What I take to be this species is 
represented by a short series from the New Forest (D.S.) 
and one male from Studland (J.W.Y.). In most specimens 
