THE OLIVE. 9 



collectors. In Scotland it has been noted in only a few localities. 

 Abroad, the range extends to Amurland. 



Mesogona acetosellcB, Fabricius. — Mr. R. Adkin has a speci- 

 men of this Central and South European species. It was taken 

 at sugar on the evening of October 26th, 1895, by Mr. T. 

 Salvage, in his garden at Arlington, Sussex {Entomologist^ 

 xxviii. p. 316). 



The Double Kidney {Plastenis retusa). 



This olive-brown species, shown on Plate 4, Fig. 7, has a 

 reddish-tinged form — 3)0. gracilis^ Haw. — but otherwise there is 

 httle to be noted in the way of variation. The caterpillar is 

 pale green with three whitish lines on the back, and a narrower 

 and more irregular whitish line low down along the sides ; head, 

 yellowish green, or dark brown. Sometimes the body has a 

 yellowish tinge at each end. It feeds on the foliage of sallow 

 and willow, from April to June, drawing together the terminal 

 leaves of a shoot as a retreat. 



The moth is on the wing in July and August, and is more 

 frequently attracted at night to the aphis secretion known as 

 "honeydew" than to the sugar patch, although it does not 

 ignore the latter altogether, and occasionally enters the illu- 

 minated moth trap. Barrett states that he has found it at the 

 flowers of figwort {Scrophiilana aquatica). Apparently a local 

 species, but found more or less frequently in most of the southern 

 and eastern counties of England, and through the Midlands to 

 Cheshire, Lancashire, and Yorkshire ; it is, however, rarely 

 seen in the three last-named counties. 



The range abroad extends to Amurland and Japan. 



The Olive (Plastenis snbtusa). 



This moth is shown on Plate 4, Fig. 6. It is somewhat 

 similar in general appearance to the last mentioned, but the 



