I30 



BRITISH GALLS 



FILICES 



Hymeu- 

 optera 



Diptera 



Hymen- 

 optera 



Diptera 



Fteris a^uilina Linn. 1 12. Bracken. 

 Pinnules swollen and discoloured, containing several 

 eggs. The larvae feed externally on the frond. ' 



Selandria temporalis Thorns. 

 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. 



Connold, Plant Galls, fig. 70. App^reittly 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 



Syn. Cecidomyia pteridis Miiller. 



Connold, Veg. Galls, pi. 83 ; Plant Galls, fig. 71. 

 A. MuUer, 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 

 Houard, No. 65. 



Athyrium Filix-foemina Roth. no. Lady Fern. 

 Tip of frond rolled inwards. See No. 4. 



Anthomyia signata Brischke 

 Trail, 1878, p. 78. Houard, No. 63. 



Lastrea Filiz-mas Fresl. 1 12. Male Fern. 

 Pustules on the margins of the lobes. 



Selandria analis Thorns. 

 Houard, No. 58. 



Tip of frond rolled inwards. See No. 4, 



ANTHOMYIA signata Brischke 

 Houard, No. 56. 



Lastrea aristata Rend, and Britt. {dilatata Presl.). 

 III. Buckler Fern. 

 Tip of frond rolled inwards. See No. 4. 



Anthomyia signata Brischke 



