CATALOGUE OF BRITISH PLANT-GALLS 215 
Diptera 
Homop- 
tera 
Acari 
99 
9 9 
Diptera 
BUXACEAE 
Buxus sempervirens Linn. 3. Box. 
Pustules in the parenchyma of the leaf, which is slightly 
thickened and somewhat yellowish. Larvae yellow. M. G. 
Monarthropalpus buxi Laboulb. 601 
Syn. Diplosis buxi Lab. 
Connold, Plant Galls, p. 82. Houard, No. 3911. 
The leaves at the extremity of a branch deformed and 
bent into a hemispherical gall resembling a cabbage in 
miniature. Greyish or light brown. 
Psylla BUXI Linn. 602 
Connold, Plant Galls, fig. 69. Houard, No. 3908. 
ACERACEAE 
Acer Pseudo-platanus Linn. Sycamore. 
Brilliantly coloured pimples (1 to 2 mm. in diameter), 
carmine, purple or brown, on the upper surface of the leaf ; 
often very numerous The internal cavity is lined with 
unicellular brown hairs which are particularly numerous 
at the opening on the inferior surface. Ceratoncon vulgare 
Bremi. (Plate XIIL 1.) 
Eriophyes macrorrhynchus N ale pa 603 
Syn. Phytoptus aceris Nalepa. Phytoptus myriadeutn 
Murray. 
Connold, Veg. Galls, pi. 73; Plant Galls, fig. 290, therein 
attributed to Phyllocoptes acericola, Nal. Houard, No. 3978. 
Isolated glabrous pimples on the upper surface of the 
leaf, 2 to 4 mm. in diameter. Internal cavity lined with 
brown pluricellular hairs, opening inferior. Cephaloneoti 
solitarium Bremi. 
Eriophyes macrochelus Nalepa 604 
Syn. Phytoptus macrochelus Nalepa. 
Connold, Plant Galls, fig. 289. Swanton, Knowledge, 
June, 1910. Houard, No. 3979. 
Slight swelling on the upper surface of the leaf at the 
junction of the nervures ; the depression on the correspond¬ 
ing inferior surface is clothed with a mass of swollen hairs. 
(Plate XIII. 15.) 
Phyllocoptes acericola Nalepa 605 
Houard, No. 3975. 
Acer campestre Linn. 62. Maple. 
Elongated fusiform swelling on the petiole ; occasionally 
the basal part of the midrib is also involved. Reddish- 
