NOTES ON MASONIA EDWARDSELLA, A PSYCHID NEW TO SCIENCE. 45 
are the largest), the hairs on them fairly strong and conspicuous ; the 
prolegs weak and extending but little beyond the skin-surface ; those 
on abdominal segments 38-6 have hooks arranged as in P. villosella, 
but on 10 the partial ring is almost circular. There is, however, no 
pit or depression in the centre of the ring of hooks on the prolegs, as 
in the larger Psychids. ‘The six ocelli are placed rather further from 
the base of the antenne, and the 6th ocellus (the last of the ventral 
ones) is not so far distant from the 5th as is the case in the larger 
species (P. villosella, &c.). [Bacot. Described from larvee obtained at 
Aix-les-Bains, by Mr. Edwards, April, 1898] . 
Pura.—@. The female pupal-skin is semitransparent, pale 
yellowish in colour, the surface smooth and shiny. It consists of a 
long, smooth, oval abdomen, the thorax and head being represented 
by a minute black collar at the anterior end, no structural details 
being obvious. The pupa is 6°5mm. in length, and the black collar 
representing the head and thorax is less than ‘75mm. The abdominal 
segments 2-6 are larger than the others; the first is smaller, and 
tapers rapidly to join the minute thorax ; 7-10 taper more gradually 
to the anus, which ends in a blunt point; the rudiments of sexual 
organs are clear and well-marked. The spiracles are distinct on 
abdominal segments 2-7, and are surrounded by a slightly raised 
chitinous ring. On the anterior edge of segments 4-7 dorsally is a 
row of small curved spines or hooks pointing backwards, these are 
darker than the ground colour of the pupa, and show up pretty dis- 
tinctly under a 1"’ power. On the posterior edge* of the 4th and 5th 
abdominals there is a row of small frail and almost transparent spines 
pointing forwards, these require some search to discover. Primitive 
sete are present, but are difficult to detect owing to the reflected light 
from pupa-skin; they are placed dorsally in trapezoidal form (as in 
larva), and the inconspicuous lateral setee appear to be in the same posi- 
tion as in the*larva. Certain portions of the skin-surface are covered 
with minute spicules (Bacot, June, 1898). 
This species is most closely allied to Masonia saxicolella, Brd., and 
M. subflavella, Mill. Indeed, we should not be surprised to find that 
it was the former species, which has been absolutely lost since Bruand’s 
time, but his wing measurement for M. sazicolella, 15mm., is 
much too great for that of M. edwardsella, and his suggestion that his 
saxicolella might be a var. of Bruandia comitella (which has a cellula 
intrusa) adds yet another difficulty to our acceptance of this species as 
saxicolella. The specimens here described were bred from cases col- 
lected by Mr. Edwards and Dr. Chapman at Aix-les-Bains, in early 
April, 1898. We were under the impression that some of the cases of 
this species were also obtained on the rocks and walls about Antibes 
and Cannes, but Dr. Chapman is positive that those from which the 
examples were bred came from Aix-les-Bains. We have great pleasure 
in naming this species after Mr. Stanley Edwards, whose skill in find- 
ing, and energy in seeking, Psychid cases is most remarkable and 
praiseworthy. 
* In view of Dr. Chapman’s remarks on these spines in Sctoptera zermat- 
tensis (ante, vol. xi., p. 181), it is possible that they are really on the interseg- 
mental membrane in this species also.—A. B, 
