I go 



BRITISH GALLS 



Homop- 

 tera 



Coleop- 

 tera 



Diptera 



Coleop- 

 tera 



Diptera g 



Coleop- 

 tera 



Leaf margin rolled upwards. See No. 410. 



Aphis brassicae Linn. 399 

 Houard, No. 2739. 



Sisymbrium officinale Scop. iii. Hedge Mustard. 

 Seed-pod swollen. 



CeUTHORRHYNCHUS ASSIMILIS Payk. 400 



Connold, Plant Galls, p. 245. Ormerod, p. 156. 



Unilocular ovoid swelling, 7 to 8 mm. long, 4 mm. in 

 diameter, on the petiole or the midrib, dull green, axial, 

 sometimes lateral. M. E. 



CEUTHORRHYNCHUS CHALYBAEUS Germar 40I 



Houard, No. 2522. 



Fleshy excrescences each about the size of a pea, at the 

 base of the stem. 



CEUTHORRHYNCHUS PLEUROSTIGMA Marsh 402 



Houard, No. 25 19. 



Inflorescence deformed; the flower-stalks swollen, 

 forming a fleshy or spongy mass, from which the crowded 

 seed-pods arise in a peculiar spicate manner. Larvae 

 gregarious, white. M. £, 



CONTARINIA RUDERALIS Kieffer 403 



Houard, No. 2516. 



Inflorescence deformed. See Nos. 382, 383. 



Dasyneura sisymbrii Schrank 404 

 Connold, Veg. Galls, pi. 29 ; Plant Galls, fig. 160. 

 Houard, No. 2517. 



Sisybrium Sophia Linn. 64. Flix-weed. 

 Root swollen at its apex. See No. 402. 



CEUTHORRHYNCHUS PLEUROSTIGMA Marsh 405 



Houard, No. 2539. 



Inflorescence deformed. June to November. See 

 Nos. 382, 383. 



Dasyneura sisymbrii Sch. 406 

 Houard, No. 2538. 



Erysimum cheiranthoides Linn. 38. Treacle Mus- 

 tard. 

 Root swollen at the junction with stem, See No. 402. 



CEUTHORRHYNCHUS PLEUROSTIGMA Marsh 407 



Houard, No. 2716. 



