The Raspberry Horntail 247 



THE BLACKBERRY LEAF-MINER 



Metallus rubi, Forbes 



Though ordinarily considered of minor importance, this insect 

 may at times cause considerable damage. The adult is a nearly 

 black saw-fly about one-sixth of an inch in length. The larvae feed 

 between the two layers of the leaf like other leaf-miners, making 

 rather large, irregular, blotched mines. Sometimes several of these 

 mines may be found on a single leaf. These injured parts turn brown 

 and die. The flies appear and begin laying their eggs in May and 

 June. The larva is greenish white, with brownish markings, and 

 is about one-third of an inch long when full grown. The larvae 

 enter the ground an inch or so to transform, and hi warmer localities 

 there are two broods a year. 



Treatment. A mixture of one-half pint of "Black Leaf 40" to- 

 bacco extract, two pounds of soap and fifty gallons of water, which 

 has been found effective against an elm leaf -miner, has been sug- 

 gested as a possible remedy of value. 



THE RASPBERRY WEBWORM 



Pamphilius Fletcheri, MacGillivray 



This insect has been reported troublesome in New Brunswick. 

 It is a bright green worm, half an inch long when full grown, being 

 the larva of a small sawfly. They web together the terminal leaves, 

 feeding within. Handpicking, or dusting with hellebore before the 

 webs are formed are suggested. 

 Reference. 



Fletcher, Kept. Ent. Bot. 1899, p. 180. 



THE RASPBERRY HORNTAIL 



Hartigia abdominalis, Cresson 



This is another cane-girdler, which has caused trouble in California, 

 attacking young shoots of raspberry, blackberry, loganberry and 

 rose. The adult is a slender, yellow and black four-winged horntail 

 fly about five-eighths of an inch in length. It is found on the plants 



