THE ENTOMOLOGIST. 177 



followed by a pale green slightly dilated blotch, will be 

 detected on one or other of the leaves ; some of the leaves 

 may possibly be observed to contain four or even five of the 

 little mines, which are, I believe, more often fonnd at the tip 

 or sides of the leaf than in the other parts. On extracting 

 the larva it is observed to be about a line and a half in 

 length, and is possessed of six legs and sixteen claspers, 

 fourteen of these being ventral and two anal ; the 4th and 

 the 12th or penultimate segments are apodal : the head 

 is brown, with darker markings ; the back of the 2nd seg- 

 ment has a large dark brown plate, and the dorsal surface of 

 the 3rd segment is decorated with a narrow plate of a similar 

 colour to that on the 2nd segment ; tfiese two plates are 

 divided down their centres by a dorsal line : the body is 

 white, with a faint tinge of green imparted to it by the 

 greenish fluid contained within the dorsal vessel ; the mouth 

 is dark brown, the head pale brown, the colour of the 2nd 

 segment being dark brown, and on either side of this seg- 

 ment is a little white tubercle ; the 3rd segment has a 

 circular black spot in its centre ; the 4th segment also 

 possesses a black central spot, as do likewise the 5th and 

 6th ; the thoracic or true legs are black, the ventral claspers 

 white, the anal ones being nearly surrounded by a black 

 band : when the larva moults for the first time, the small 

 black spot previously noticeable on the ventral surface of the 

 6th segment entirely disappears. Like others of this genus, 

 the larva feeds whilst lying on its back : when irritated there 

 is no emission of fluid from its spiracles : after each moult 

 the markings gradually reappear, and settle down to their 

 proper tone, the exuviae of the larva remaining within the 

 mine : when this larva is about half or three-quarters grown, 

 the under side of its 3rd and 4th thoracic segments has 

 additional markings ; the 3rd segment has one, and the 4lh 

 has two, small black spots on each side near the legs ; and 

 the bases of the inner margins of the six true legs are partly 

 surrounded by a semicircular black-coloured mark or band : 

 by the time the larva is full-fed it forms a large brown blotch in 

 the leaf, both sides of the leaf near the mine becoming dis- 

 coloured, the upper part by far the most so. The larva, 

 having quite satisfied its hunger, throws off its integument 

 for the fourth time, and appears in a new dress ; its mouth is 



