PROCEEDINGS OF THE PERTHSHIRE SOCIETY OF NATURAL SCIENCE. 
131 
known from the county, arranging them as in the pre 
vious list, are:— 
Asexual. 
Dryophanta folii. 
,, divisa. 
Neuroterus lenticularis. 
,, fumipennis. 
,, numismatis. 
„ ostreus. 
Biorhiza renum 
Sexes distinct. 
Andricus curvator. 
Spathegaster baccarum. 
Spathegaster vesicatrix. 
Dryoteras terrain alis. 
Trigonaspis megaptera. 
Forms not yet shown to be dimorphic. 
Cynips Kollari. 
Andricus quadrilineatus. 
,, araenti. 
From this list it will be seen that there is still work to be 
done among you in this group of insects. 
APPENDIX A. 
Descriptions of forms that have not yet been found in Scot¬ 
land, but of which the (supposed) other generation is 
known to be Scottish. 
Aphilothrix globuli Hart., is a tiny bud-gall, globular, 
ending in a blunt cone or wart, diameter about J-inch, 
surface green, hairless, smooth, but when dried show¬ 
ing a network of low ridges, owing to the fleshy outer 
wall shrinking on to the hard inner wall. The insects 
(asexual) are said to emerge from February to April, and 
the galls are to be found in autumn, but remain a good 
deal surrounded by the leaf-scales. It is regarded as 
the asexual form of Andricus inflator. 
Andricus gemmatus, Adler, forms exceedingly small 
bud-galls (about l-12th-inch long or less), oval, at first 
green, then brown, and extremely thin. From its small 
size this gall must be very difficult to detect. It is 
formed in summer, and is regarded by Dr Adler as the 
sexual form alternating with Aphilothrix corticis, which is 
asexual. 
Spathegaster Taschcnbergi Schlecht. is the corresponding 
form to Dryophanta folii ; and is also a bud-gall. Several 
often stand along a young twig, one at each node. They 
are nearly ovate, with a rounded tip, about J-inch 
long, and are of a fine velvety violet, due to the presence of 
a layer of pigment cells and of a fine coat of short pale 
hairs. The wall is soft, and is eaten by the larva till it 
becomes exceedingly thin. The galls are to be found in 
the end of May and in June. The insects (male and 
female) emerge in June and July, 
Spathegaster similis, Adler, corresponds to Dryophanta 
longiventris. The galls are much like the preceding ; but 
are smaller and more pointed, with a greenish-gray velvety 
surface, the hairs on which are longer. They are most 
commonly found on the adventitious buds near the base of 
the tree trunks, and appear earlier than the last species. 
Spathegaster aprilina Gir. has been found near 
Nottingham, in England. The galls are situated in the 
midst of bud-scales, more or less surrounded by them; are 
rounded or oval in form, pea-sized, pale yellowish or 
greenish spotted with red; and bear a few scattered hairs. 
They are formed in spring, in a very short time. The 
insects (male and female) emerge in April or in May, and 
in a few days the gall shrivels up, and hardly a trace of it 
is left. 
Neuroterus laeviusculus, Schenck, forms galls very like 
those of N. lenticularis , but they may be distinguished 
from the latter by the slightly smaller size, sparser covering 
of hairs, and saucer-like upturned margains. They occur 
along with the latter species, but are more often found on 
the upper surface of the leaf than that species. This gall 
has been found in various parts of England; and by myself 
in autumn of this year at Keswick, in Cumberland, 
hence it might be expected to be found in Scotland apart 
from the fact that the form Spathegaster albipes has been 
recorded from Glasgow. 
Andricus pilosus, Adler, is regarded by Dr Adler as the 
sexual form of Aphilothrix gemmae. Its gall seems very 
closely to resemble the galls of Andricus amenti in size 
and form, and like them is situated on the male inflor¬ 
escences. Indeed, I cannot point out any character to 
distinguish the galls from one another, and believe that 
they may perhaps be the same species. However, Dr 
Adler’s description and figure, though not showing any 
good distinctive characters, hardly allow of certainty. 
APPENDIX B. 
Descriptions of two species omitted . Aphilothrix Clemen¬ 
tines should have appeared on p. 125, before A. calli- 
doma; and Andricus curvator on p. 123, before A. 
marginalis. 
Aphilothrix Clementince Gir. has been recorded by Mr 
Cameron (E.M. Mag. XVI., 266, May 1880) from Cadder, 
near Glasgow, “ in the middle of October. It was then 
green, with pink stripes.” The gall is spherical, but is 
slightly conical at the base, and shows a small sharp tip 
at the apex. It is about the size of a small pea (5 mm. 
diameter); and the surface bears scattered flattened warts, 
and is sparsely covered with yellowish-white hairs directed 
