CATALOGUE OF BRITISH PLANT-GALLS 183 



CASOPHYLLACEAE 



Silene latifolia, Rendle and Britten {inflata Sm.)< 



104. Bladder Campion. 



Homon- Summit of the plant curiously distorted and bunched. 



tera Aphis greenish with black head ; mealy, cornicles very 



small, black. July and August. The aphides often 



crowd within the capsules. 



Hyalopterus melanocephalus Buckton 343 

 Buckton, ii., 1 16. Houard, No. 2264. 



Silene acaulis Linn. 21. Cushion Pink. 

 Diptera On the stem. Terminal internodes remaining closed ; 

 leaves bunched very large and very thick, usually dis- 

 coloured ; almost white towards the base, green at the 

 apex. Larvae gregarious, rosy-red. M. E. 



Perrisia alpina F. Low 344 

 Houard, No. 2274. 



Lychnis alba Miller. 103. White Campion. 

 ,, Flower buds swollen, not opening. Larvae gregarious, 



white or yellowish. M. E., ii. 



CoNTARiNiA Steini Karsch 345 



Houard, No. 2291. According to Collin (Ent. Mo. 

 Mag., 1904, p. 96), this is apparently the insect of which 

 the larvae and the galls caused thereby were described 

 by Binnie in Proc. Glasgow N. H. Soc, 1876, p. 184 ; and 

 the gall described by Barrett in Ent. Mo. Mag., 

 ^1872, vol. viii., p. 205, would appear to be caused by 

 the larvae of a different species, possibly Perrisia lych- 

 nidis Heyd. 



Cerastium vulgatmn Linn, (triviale Link). 112. 

 Narrow-leaved Mouse-ear. 

 „ The two terminal leaves joined along their margins 



and slightly thickened, forming a cavity for the reddish 

 larvae. Occasionally the buds are attacked and become 

 swollen. M. G. Imago appears in August or in the 

 following spring. 



Perrisia lotharingiae Kieffer 346 



Connold, Plant Galls, p. 95. Swanton, Knowledge, 347 

 June, 1910. Houard, Nos. 2331, 2334. 



A mass of hairy reddish leaves at the extremity of a 

 shoot with an oval cavity between them containing 

 several orange-coloured larvae. M. G. 



Perrisia cerastii Binnie 348 



Syn. Cecidomyia cerastii Binnie. 



Connold, Plant Galls, p. 244. Houard, No. 2338. 



