CATALOGUE OF BRITISH PLANT-GALLS 2I5 



BtTXACEAE 



Buxus sempervirens l.inn. 3. Box. 

 Diptera Pustules in the parenchyma of the leaf, which is slightly 

 thickened and somewhat yellowish. Larvae yellow. M. G. 



MonarthropalpUs buxi Laboulb. 601 

 Syn. Diplosts buxi Lab. 

 Connold, Plant Galls, p. 82. Houard, No. 391 1. 



Homop- The leaves at the extremity of a branch deformed and 

 tera 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. 



ACEBACEAE 



Acer Pseudo-platanus Linn. Sycamore. 

 Acari Brilliantly coloured pimples (i 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. Ceratoneon vulgare 

 Bremi. (Plate XIII. i.) 



Eriophyes macrorrhynchus Nalepa 603 



Syn. Phytoptus aceris Nalepa. Phytoptus myriadeum 

 Murray. 



Connold, Veg. Galls, pi. 73; Plant Galls, fig. 290, therein 

 attributed to Phyllocoptesacericola, 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. Cephaloneon 

 soUtarium Bremi. 



Eriophyes macrochelus Nalepa 604 

 Syn. Phytoptus macrochelus Nalepa. 

 Connold, Plant Gall?, 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. 

 Diptera Elongated fusiform swelling on the petiole ; occasionally 



the basal part of the midrib is also involved- Reddish- 



