BRITISH GALL-GNATS. 149 
figured; the arrangement is alphabetical, as this appears the 
most convenient. In this country first Mr. Hardy, then Mr. 
Inchbald, and later Mr. Muller published from time to time some 
most interesting notes on the productions and habits of these 
gall-making Diptera, and during the last few years Dr. Trail has 
added much to our knowledge of the galls by his papers in the 
‘Scottish Naturalist,’ which have lately been collected and 
revised in the ‘Transactions of the Natural History Society of 
Aberdeen.’ Still much is to be done; additions to the following 
list should not be difficult. The three volume systematic work of 
Walker and Haliday on our British Diptera is well known. 
There (vol. ii., p. 73), we read, ‘‘ These flies (Cecidomyzide) are 
the most elegant and delicate little creatures in the whole of the 
Diptera.”’ 
acropHiLaA, Wtz. (Cectpomyia). Walker, I. B. i. 82. W. Cole, Proc. 
Ent. Soc. Lond. 1874, p. xix. 
Pod-like leaflets of M'rawxinus evcelsior. Metamorphosis external. 
BETULEH, IVtz. (Cucrpomyia). Walker, I. B. iii. 85. Figured, Fr. Low, 
Verh. z.-b. Gesell. Wien. xxviii., pl. iv. fig. 4. 
Enlarged fruit of betula alba. Metamorphosis internal. 
BoTULARIA, JI’tz. (Dipiosis). Hardy, Scot. Gard. i. 1389. Walker, I. 
B. iii. 111. Miller, Entom. v. 248. Figured, Bremi, pl. i., 
fie: 1 
Swollen midrib of leaflets of Mraxinus excelsior. Metamorphosis 
external. 
Brassice, Itz. (Cecrpomyia). Walker, I. B. iii. 84. 
Deformed flowers and pods of Brassica oleracea, &&. Metamorphosis 
external. 
pursaRiA, Br, (Cecrpomyia). Walker, I. B. in. 89. Miller, Entom. 
vi. 180. Figured, Bremi, pl. i. fig. 20. 
Tubular galls on leaves of Gilechoma hederacea. Metamorphosis 
internal. 
guxI, Lab. (Dievosis). Fitch, Essex and Suffolk. ? Armistead, Zool., 
2nd ser., p. 1201. Figured, Laboulbéne, Ann. Soc. Ent. Fr., 
5th ser., vol. in. pl. 9. 
Swollen leaves of Bucus sempervirens. Metamorphosis internal. 
catuipa, Wtz. (Dietosis). Walker, I. B. iii. 95. 
Thickened seed capsule of Puparer Rhewas and P. dubia. Meta- 
morphos:s internal. 
CAMPANULE, Miller (undescribed). Proc. Ent. Soc. Lond. 1871, p. 8 
(see Entom. v. 295). Trail, Trans. N. H. 8. Aberdeen, 1878, 
p. 66. 
Axillary bud-galls and inflated seed-capsules of Campanula 
rotundifolia, ; 
capRE®, |Wtz. (Hormomyta). Hardy, Scot. Gard. ii. 80. Walker, I. 
B, iii, 128. Figured, Bremi, pl. ii. fig. 388. 
