364 Mr, I, W. Edwards’ Notes on British Mycetophilidae. 
*B. trispinosa, sp. n. 3. 
B. sciarinae similis, differt hypopygio et coxis posterioribus 
tibiarumque calcaribus fuscis. 
Closely resembles B, sciarina in general appearance, yet the 
genitalia (fig. 65) are totally unlike those of any species of Boletina 
which has so far been figured. If it were not for the darkened 
posterior coxae I should have said that the species was B. conforms, 
Siebke (pseudosciarina, Strobl), but it seems best on the whole to 
describe it as a new species. The antennae are about twice the 
length of the head and thorax together. 
A male from Lelant, Cornwall, 31. vin. 1907 (J.W.Y.), 
(type, in the British Museum); another from Bettws-y- 
Coed (G.H.V.). This latter specimen has only the basal 
half of the hind coxae darkened, and the genitalia have an 
additional long spine, which, however, is weaker than the 
other three. 
Putruinta, Winn. 
*P. winnertzi, Mik. Logie, Crowborough (F.J.); 
Beattock (C.G.L.); Sheviock, Cornwall (J.W.Y.); King’s 
Lynn (E.A.A.); New Forest (F.C.A., D.S.). The hypo- 
pygium (fig. 66) is small, weakly chitinised and light 
yellow in colour. The anal vein is practically straight. 
Ovipositor, fig. 67. 
P. humilis, Winn. The specimens I have seen of this 
species do not agree very well with the original description. 
They are larger (6 mm.), have a lighter coloured thorax and 
shorter antennae. Still I think the identification is prob- 
ably correct. New Forest (D.S., F.C.A.); Crowborough 
(F.J.); Lelant (J.W.Y.). One of the specimens originally 
recorded under this name is P. winnertzi. Hypopygium, | 
figs. 68 and 69; ovipositor, fig. 70. A specimen from 
Studland (J.E.C.) has the thorax with three sub-confluent 
dark brown stripes, and in this, as in three males from the 
New Forest, the genitalia are slightly different, the large 
black appendages (fig. 69a) not being nearly so broad. 
This form I at first took to be a distinct species. 
The anal vein in P. humilis is curved downwards towards 
the tip. 
Cortosta, Winn. 
As I interpret this genus it should include also Phthinia 
thoracica, Winn., and probably P. curta, Joh., a North 
American species. ; 
