228 
BRITISH GALLS 
Coleop- 
tera 
Fungi 
Acari 
Homop- 
tera 
Diptera 
Acari 
Coleop- 
tera 
Mentha arvensis Linn. in. Corn Mint. 
Unilocular swelling on the stem, ovoid or spherical, 
4 to 6 mm. long, 2 to 3 mm. in diameter; red, situated 
just above the upper nodes ; the walls are at first thick 
and fleshy, becoming thin and hard at maturity. The 
cavity contains a citron-yellow larva. M. G. 
Apion vicinium Kirby 694 
Houard, No. 4953. 
Stem swollen. See No. 690. 
PUCCINIA MENTHAE PerSOOn 695 
Plowright, p. 157. 
Origanum vulgare Linn. 90. Common Marjoram. 
Inflorescence deformed, the whole forming a mass of 
white hairs, amongst which the mites creep. 
Eriophyes origani Nalepa 696 
Connold, Plant Galls, fig. 154. Houard, No. 4901. 
Thymus Serphyllum Linn. 112. Wild Thyme. 
Ovoid red swellings on the young shoots, not abnor¬ 
mally hairy. Elongated abnormally pubescent red swell¬ 
ings 3 to 4 mm. long, 1 to 2 mm. thick, on the stems. The 
epidermis of the swelling does not crack. The internal 
cavity contains a yellowish larva. M. G. 697 
Apion atomarium Kirby 698 
Houard, Nos. 4918, 4922. 
Corolla completely altered, transformed into an ovoid 
body with a large cavity, stamens and pistil absent. Calyx 
much enlarged, twice the normal size, always exceeding 
the corolla. The cavity contains a single red larva. 
Asphondylia thymi Kieffer 699 
Trail, Scot. Nat., ii., 1873, p. 252. Houard, No. 4913. 
Flower head and terminal leaves deformed, the leaves 
elongated and swollen; the whole covered with an abun¬ 
dant white pilosity resembling cotton wool. May to 
October. 700 
Eriophyes Thomasi Nalepa 701 
Connold, Plant Galls, fig. 293. Houard, No. 4920. 
Calamintha Acinos Clairv. (arvensis Lam.). 75. 
Basil Thyme. 
Ovoid swelling on the stem. See No. 694. 
Apion vicinium Kirby 702 
Houard, No. 4896. 
