130 
BRITISH GALLS 
Hymen- 
optera 
Diptera 
n 
n 
Hymen- 
optera 
Diptera 
FILICES 
Pteris aquilina Linn. 112. Bracken. 
Pinnules swollen and discoloured, containing several 
eggs. The larvae feed externally on the frond. 
Selandria temporalis Thoms. 1 
Houard, No. 70. 
Fusiform swelling at the base of the frond, surface 
irregularly dented or rugged. Cavity central, 20 to 40 mm. 
long, containing a single larva. 
Cynips sp. 2 
Connold, Plant Galls, fig. 70. Apparently the same is 
alluded to by Houard (No. 71), but is described as multi- 
locular. 
Margins of the pinnules rolled inwards and greatly 
thickened; reddish at first, becoming quite black at 
maturity. Each roll contains a pale orange-yellow larva. 
M. E. (Plate XVIII.) 
Perrisia filicina Kieffer 3 
Syn. Cecidomyia ftteridis Muller. 
Connold, Veg. Galls, pi. 83 ; Plant Galls, fig. 71. 
A. Muller, 1871, pp. 99, 100. Trail, 1878, pp. 77, 78. 
Houard, No. 68. 
Tip of the frond more or less rolled inwards, each lobe 
containing a white larva. M. E. 
Anthomyia signata Brischke 4 
Houard, No. 65. 
Athyrium Filix-foemina Roth. no. Lady Fern. 
Tip of frond rolled inwards. See No. 4. 
Anthomyia signata Brischke 5 
Trail, 1878, p. 78. Houard, No. 63. 
Lastrea Filix-mas Presl. 112. Male Fern. 
Pustules on the margins of the lobes. 
Selandria analis Thoms. 6 
Houard, No. 58. 
Tip of frond rolled inwards. See No. 4. 
Anthomyia signata Brischke 7 
Houard, No. 56. 
Lastrea aristata Rend, and Britt. (dilatata Presl.). 
Hi. Buckler Fern. 
l ip of frond rolled inwards. See No. 4. 
Anthomyia signata Brischke 8 
