278 ROEBUCK : VARIATION IN LEHMANNIA ARBORUM. 



c. Var. Bettonii Sordelli. 



' Animal ornatissinuis, dorso a I bo fuscoqiie maculato, 

 zonula albida iitcdiana zonis dtiabus fnscis concomitantibiis ; 

 dypeo zona fusca median a, zonis lateralibus albidis et fnscis 

 alternaniibus. Carina brevis.' (Less. & Poll., 1882). 



Pini (Moll. d'Esino, 1876) remarks that this mutation 

 of L. arboruni is one with the coloration clearer, and in 

 which the lateral bands of the body are more widened, pale, 

 and interrupted with yellowish-white granulations which 

 produce a similarity to the markings of Liniax flavus. In 

 Lombardy this variety abounds near Monza and Milan 

 (Pini, 1876). 



I have now the opportunity of adding this beautiful 

 form to the British list, on the strength of specimens 

 obligingly sent me in the middle of October by Miss Hockin, 

 of Phillack, near Hayle, West Cornwall. There were 

 numerous specimens of L. arboruni, two of which agreed 

 exactly with the description of Lessona & Pollonera, while 

 some of the others approached it less distinctly. Of the 

 two which I refer to the variety, one, which is lighter- 

 coloured than the other, showed very distinctly the bordering 

 of the two dark bands on the shield by distinct whitish 

 lines. The specimen has preserved this character as a spirit- 

 preparation. The other specimen is more obscure, and 

 reminds one at first glance of the general appearance of 

 Z. agrestis. It can therefore be more readily understood 

 how Sordelli, in originally describing this variety as a distinct 

 species, erroneously assigned it to a position near to Z. 

 agrestis. This error he speedily rectified, and he saw that 

 his new species was in reality only a form of Z. arboruni. 



d. Var. alpestris Less. & Poll. 



' Animal aliquantulwn tni?ior, carina validiore usque 

 ad ^ dorsi ; clypeo scepe zonis obscui'is confusis nigricante, 

 dorso unicolore zonula pallida tnediana^ (Less. & Poll., 1882). 



Found in the Piedmontese Alps. (Less. & Poll., 1882). 



J.C, iv., Jan., 1885. 



