DISEASES OF THE VINE. ] 603 



destroy the tender foliage. The larva is yellowish with 

 two brown lines on the back, and a black line on each 

 side. In cases of severe invasions the vines are sprayed 

 with arsenical mixtures, chiefly of arseniate of lead. 



Agrotis fimbria, L., A. aquilina, Hb., A. crassa, 

 Hb., A. segetum, Schiff. and A. pronuba, L., of which 

 the last three are present in these Islands, may cause 

 some damage to the tender foliage in spring, but direct 

 their attentions to other vegetables as soon as the leaves 

 cf the vine have acquired some consistence. 



Chaerocampa celerio, L. is a large moth whose larva 

 sometimes attacks the vine in these Islands as well as in 

 Italy and France. A nearly allied moth, Deilephiia 

 elpenor, L. is frequent in Italy and France but never 

 causes serious trouble ; so also is the case with Deilephiia 

 potcellus, L. which is likewise unknown in these Islands. 



A much more serious pest of the vine which 

 fortunately has not yet made its appearance in our 

 vineyards, but is frequent enough all over the continent 

 of Europe as well as in Asia Minor and Japan, is 

 Conchylis ambiguella, Hiibn., a small straw-coloured 

 moth, not more than \\ c m. across the expanded wings, 

 with a broad dark brown band across the anterior wings, 

 and dark grey posterior wings. The larva is pale olive 

 green, with brown yellow tubercles, each terminated by 

 a hair. The chrysalis is greenish purple, about 6 m m. 

 long. In April or May, the hybernating chrysalis 

 develops into the moth, which proceeds to lay eggs on 

 the inflorescence of the vine, and after a few days the 

 young larvae are hatched, and prey first on the flowers 

 and then on the young berries, completing their metamor- 

 phosis in two or three weeks. In June or July a second 

 generation develops which preys on the berries, and 

 probably a third g neration follows somewhat later to 

 complete the work of devastation. In September the 



