FAMILY iEGERID^. 223 



The cocoon is constructed partly out of the castings of the larvae, which, by means of 

 gum and silk, is formed into a common oval shell surrounding the pupa : these may be 

 destroyed at once. 



To protect a tree, Dr. Harris long ago recommended the use of sheathing paper, secured 

 by strings and matting to the neck of the tree after removing the earth. This paper should 

 be cut in strips eight or nine inches wide, and fixed below the soil by means of mortar and 

 fresh loam. The application requires renewal every spring ; but whatever means may be 

 adopted, careful examination during the months of June and July should not be neglected. 

 Wounds that may be made in the removal of living bark and wood, should be covered 

 with grafting Avax, or something to protect the surface from water. 



The currant-bush is injured by the ^geria tiptilifcrmis, which is not a native of this 

 country, but is of European origin. The eggs are laid near the buds, and, when hatched, 

 the larvae penetrate the bark and wood, and even into the pith : the stems become brittle ; 

 but, before this, they show marks of disease by yielding an inferior fruit. 



Dr. Harris describes another insect allied to the ^geria, the Trochilium denudatum 

 ( Harris) : the color is brown ; the edges of the collar and of the abdominal rings, the 

 shins, the feet, and the underside of the antennae are yellowish ; the forewings opake, and 

 the hindwings transparent. It attacks the ash : this tree, especially the english mountain 

 ash, when planted for ornamental purposes, seems to be quite as liable to the attacks of 

 these borers, as the peach ; and hence it requires the same attention and treatment. 



GuiuoopiB PBOLus. ( Plate xl, fig. 3.) 



GLA0COPI8 ( Tabricius). Sphinx pholits (Drury). 

 Antennae black, and thickest in the middle. Upper side black : basal half of the wings 

 orange. Beneath the color is paler, but after the same pattern. 

 The larva feeds on lichens growing upon stones, and hence is more common in bleak 

 stony places. 



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