CATALOGUE OF BRITISH PLANT-GALLS 219 



Diptera Apical leaves bunched together. See. No. 626. 



Perrisia hyperici Bremi 630 

 Trail, Scot. Nat., II., 1873, p. 31. Houard, No. 4204. 



CISTACEAE 



Helianthemum Chamaecistus Mill. 92. Common 

 Rock Rose. 

 „ Gall terminal, ovoid, consisting of a rosette of deformed 



leaves. M. G. 



CONTARINIA HELIANTHEMI Hardy 63 1 



Syn. Diplosis helianthemi Hardy. 

 Hardy, 1850, p. 187. Connold, Plant Galls, p. 246. 

 Houard, No. 4269. 



VIOLACEAE 



Viola odorata Linn. 80. Sweet Violet. 

 , Terminal leaves clustered, their edges revolute, slightly 



thickened. The revolute margins often meet. The 

 affected parts are smooth, and streaked with red or brown. 

 Larvae gregarious, white at first, tinted with orange at 

 the extremities, or entirely pale orange. M. G. 



Perrisia affinis Kieffer 632 

 Syn. Dasyneura affinis Kieffer. 

 Trail, Scot. Nat., I., 1873, p. 124. Houard, No. 4281. 



,, Swellings on stems and midribs containing the black 



spore mass. May to September. 



Urocystis violae Sow. 633 

 Plowright, p. 288. 



Viola sylvestris Kit. 55. Lilac Hedge Violet. 

 ,, Leaf margins revolute. See No. 632. 



Perrisia affinis Kieffer 634 

 Trail, Scot. Nat., I., 1873. Houard, Nos. 4283, 4284. 635 



Fungi Stems and midribs swollen. See No. 633. 



Urocystis violae Sow. 636 

 Plowright, p. 288. 



Viola canina Linn. 88. Dog Violet. 

 Diptera Terminal leaves revolute. See No. 632. 



Perrisia affinis Kieff. 637 

 Trail, Scot. Nat., I., 1873. Connold, Veg. Galls, pi. 92 ; 

 and Plant Galls, fig. 305, in both attributed to Cecidomyia 

 {Perrista) violae. Houard, No. 4290. 



