250 BRITISH GALLS 



Hypochaeris radicata Linn. iii. Long -rooted 

 Cat's-ear. 

 Hymen- Elongated fusiform swellings (rarely rounded) on the 



optera stems and petioles, often in such numbers as completely 

 to deform the plant. Yellowish-green, brownish upon 

 maturity. Larval cells numerous, each containing a 

 yellowish-white larva. June to October. M. G. Imago, 

 spring, II. (Plate XXIX. i, 2.) 



AULAX HYPOCHAERIDIS Kieffer 872 



Connold, Veg. Galls, pi. 39; Plant Galls, fig. 85. 

 Houard, No. 6036. 



Diptera Achenes swollen, rounded, brown, marked with longi- 

 tudinal ridges. The gall is thin walled, about 3 mm. in 

 diameter. Larva white. 



Trypeta sp. 873 

 Trail, 1878, p. 65. Houard, No. 6033. 



Nematoda Midrib of the leaf with an elongated irregular swelling 

 of a yellowish-green tint. The gall is not infrequently 

 formed on the blade, and is then more or less rounded. 



Anguilluli sp. 874 

 Trail, 1885. Houard, No. 6040. 



Leontodon autumnale Linn. 112. Autumnal Hawk- 

 bit., 

 Diptera Capitulum closed and swollen. 



Tephritis leontodontis De Geer 875 

 Houard, No. 6057. 



Taraxacum officinale Weber. 112. Dandelion. 

 Fungi Confluent or solitary elongated swellings on the midrib 



of the leaf and the petiole. 



Protomyces pachydermus Thiim 876 

 Plowright, p. 300. 



Minute pustules on the leaves and involucres. Entire 

 plant much dwarfed. 



Synchytrium taraxacj De Baiy 877 



878 



Sonchus oleraceus Linn. tit. Sharp-fringed Sow- 

 thistle. 

 Diptera Capitulum remaining closed, involucral bracts hyper- 

 trophied. 



Tephritis Formosa H. Low 879 

 Houardj No. 6109. 



