144- 



BRITISH GALLS 



Coleop- 



tera 



Diptera 



Acari 



99 



Hymen- 

 optera 



Rounded swellings on the branches. See No. 91. 



Saperda populnea Linn. 97 

 Houard, No, 624. 



Leaf margin tightly rolled towards the lower surface, 

 forming a compact, short (3 mm. by 2 jiim.) gall, which is 

 smaller at each end, coloured yellow, red, or purplish- 

 brown, and bent like a bow. Usually gregarious and 

 sometimes co'alescent, but the margin is never continu- 

 ously rolled. Each gall contains a single larva. 



Perrisia Inchbaldiana Mik. 98 



Syn. Cecidomyia elausiliae Bre. 



Connold, Plant Galls, fig. 323. Inchbald and Meade, 

 1886^, pp. 223-225. Houard, No. 627. 



Terminal leaves stunted and rolled. See No. 92. 



Perrisia terminaLis H. Low 

 MacDougall, Joum. Bd. Agric, Oct., 1905. Houard, 

 No. 614. 



Slight swelling on the stem. See No. 94. 



RHabdophaga saliciperda Dufour 100 

 R. Stewart MacDougall, Jour. Bd. Agric, Oct., 1905. 

 Houard, No. 621. 



Arrested development of the terminal intemodes ; the 

 leaves are shortened and crowded, forming a rosette-like 

 gall, which contains a pale red larva sheltered in a bundle 

 of erect linear leaves. Sometimes all the leaves of the 

 gall are atrophied and erect, and it then resembles a 

 small fir-cone. 



RHABDOPHAGA ROSARIA H. Low lOI 

 Syn. Cecidomyia rosaria H. Low. 

 MacDougall, Gall-Gnats on Osiers and Willows, Joum. 

 Bd. Agric, Oct., 1905. Houard, No. 613. 



Leaf margins tightly rolled, either upwards or down- 

 wards. The affected part is but slightly swollen, about 

 3 mm. long, glabrous, greenish or reddish. The galls are 

 seldom coalescent, hence the deformity is not very ap- 

 parent. Pubescent within. 



Eriophves sp. 102 



Houard, No. 591. 



According to Houard, the mites most frequently found 

 in this gall are Eriophyes truncatus Nal., E. tetano- 

 thrix Nal., and Phyllocoptes magnirostis Nal. In all 

 probability Connold's Eriophyes mar^natus (see Veg. . 

 , Galls, pi. 58, and Plant Galls, fig. 324) is one of these- 



Saliz alba Linn., var. vitellina Linn. 14. 



Margin of the leaf evenly rolled inwards until it meets 



