194 BRITISH GALLS 



each ; sometimes the interior is reduced by the larvae to a 

 single large cavity. 



Ceuthorrhynchus contractus Marsh 437 

 Connold, Plant Galls, fig. 241. Houard, No. 2505. 

 This beetle also attacks the stems of Thlaspi perfoliatum 

 Linn, in Central Europe. 



Coleop- Rounded swelling on the upper part of the root, 



tera Ceuthorrhynchus pleurostigma Marsh 438 



Houard, No. 2504. Also attacks Thlaspi perfoliatum 

 in Germany. 



Cakile maritima Scop. 64. Purple Sea-Rocket. 

 ■ > Pea-like swelling in the lower part of the stem, below 



the cotyledons, resulting from hypertrophy of the bark 

 containing the larval cavity. 



Ceuthorrhynchus pleurostigma Marsh 439 

 Houard, No. 2543. 



Bapfaanus Baphanistnuu Linn. in. Wild Radish. 

 Tumours on root. See No. 426. 



Ceuthorrhynchus assimilis Pay. 440 

 Connold, Plant Galls, p. 202. 



„ Fleshy, unilocular pea-like galls on the roots, usually 



near the stem, sometimes larger and plurilocular, each 

 cavity containing a white larva. M. E. 



Ceuthorrhynchus pleurostigma Marsh 441 

 Houard, No. 2629. 



1, On the midrib of the leaf, or the petiole, an elongated 



fusiform swelling with a large axial cavity. Imago, 

 June, I. 



Ceuthorrhynchus quadridens Panzer 442 

 Houard, No. 2631. 



Fungi Swollen white patches on stem, leaves, etc. See 



No. 394. 



Cystopus candidus Lev. 443 

 Massee, Textbook of Plant Diseases, p. 59. 



Myoe- Tumours on the roots. See No. 381. 



tozoa Plasmodiophora brassica Wor. 444 



Massee, Textbook of Plant Diseases, p. 334. 



