196 
THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
in iheir earliest formation, and makes of 
them a receptacle for its offspring. The 
common yarrow (A. millefolium) also 
gives evidence of being made subservient 
to the same end. In the last-named 
plant, however, the galls are clustered 
immediately above the root, and as each 
gall opens to give exit to its tenant it 
has something of the aspect of a floret of 
the wild Wood Daphne. The nidus 
that contains the gnat has a dense 
internal coating ol downy fibres, in which 
the pupa nestles till it emerges into the 
perfect insect. This Cecidomyia has a 
very close resemblance to the one I 
hatched from A. Ptarmica ; its habits 
and economy would appear to be similar. 
— Pkter Inchbald, Slorlhes Hall, near 
Huddersfield ; Sept. 12. 
Cecidomyia Chamcedrys. — Who does 
not know and love the Germander Speed- 
well {Veronica Chamtedrys), whose bright 
blue flowers grace our hedge-banks and 
green lanes in the sj)ring of the year? 
But see it in the autumn, and you 
will hardly recognise your quon- 
dam favourite. Tufts of woolly leaves 
take the place of flowers at the end of 
the shoots, and, though not unsightly, 
they give a singular appearance to the 
plant. These are the work of gall-gnats, 
and each tuft is the home of several indi- 
viduals, who pass therein the earlier 
stages of existence, the Speedwell thus 
offering both food and shelter to the 
colony. The two leaves that form the 
tufts gradually thicken, and are clothed 
with dense pile. Meanwhile the top of 
the shoot has been consumed by the 
young grubs, and they have already 
assumed their pupal garments. These 
gnats differ from some others of the 
family, inasmuch as they exhibit distinct 
cocoons — a circumstance probably owing 
to the looser and less ])rotective nature of 
their habitation. They arc the smallest 
of tlie Gccidom)i;e that have as yet come 
under my notice. 'I'hc abdomen, as with 
certain others, is reddisi), the annulatioiis 
being darker on the upper side, and the 
thorax has a dark blotch on its surface. 
The antennae are hairy and monililorm. — 
luiD ; Sept. 14. 
EXCHANGE. 
Theda Betulcs.— l have du)dicates of 
this species to exchange for the following, 
numbered in accordance with the Ap- 
pendix to the ‘Manual’; — 4, 9, 24, 28, 
35, 44, 47, 48, 52, 53, 62, 63. I have 
duplicates of 10, 15, 18, 36, 37, 41, 72, 
106, 137, 146, 147, 173,623, to exchange 
for 5, 31, 43, 45, 55, 57,66,68 to 71,75, 
86, 87 to 102, 108 to 122, 148, 160, 206 
to 212. Please write before sending 
boxes. — 'I'homas Baynes, Joiner, Ulver- 
ston, Lancashire ; Sept. 15. 
Exchange . — I have the following du-. 
plicates, numbered as in the Appendix 
to the ‘ Manual’: — 18, 58, 60, 66, 78, 
354, 357, which T shall be glad to ex- 
change for other species. Please write 
first, stating ofl'ers. — R. E. Kin<jston, 
lirantinyhain, Brough, East York. 
CIUTICAL 015SERVATIONS ON SOME 
OF THE SPECIES OF THE GENUS 
COSMOPTEKYX. 
BY U. r. STAI.VTON. 
In the year 1775 Fabricius described, 
in his ‘ Systema Entomologim,’ a Tinea 
Drnrella ; he desciibes the antennte as 
“elongate, black, with the apex white;” 
“the head, thorax and base of the wings 
silvery brown the latter “ posteriorly 
with a broad golden fascia, which is ter- 
minated on each side by a more brilliant 
silvery streak.” This desciiption was 
repeated in the ‘ Entomologia Syste- 
matica,’ and was quoted by Villcrs, iu 
