CATALOGUE OF BRITISH PLANT-GALLS 219 
Diptera 
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Fungi 
Diptera 
Apical leaves bunched together. See. No. 626. 
Perrisia hyperici Bremi 630 
Trail, Scot. Nat., II., 1873, P* 3 1 * Houard, No. 4204. 
CISTACEAE 
Helianthemum Chamaecistus Mill. 92. Common 
Rock Rose. 
Gall terminal, ovoid, consisting of a rosette of deformed 
leaves. M. G. 
CONTARINIA H ELI ANT HEM I Hardy 63 I 
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- I2 4 - 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 
Stems and midribs swollen. 
Plowright, p. 288. 
See No. 633. 
Urocystis violae Sow. 636 
Viola canina Linn. 88. Dog Violet. 
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 
(. Perrisia) violae. Houard, No. 4290. 
