THE INSECTS OF MAY. 



199 



der leaves and buds and opening blossoms of flowers and fruit 



trees. 

 The White-pine weevil flies about in warm days. We have 



found its burrows winding irregularly over the inner surface 



of the bark and leading into the sap-wood. Each cell, in which 



it hibernates, in the middle of 

 March, contains the yellowish 

 white footless grub. Early in 

 April it changes to a pupa, and a 

 month after the beetle appears, 

 and in a few days deposits its 

 egg under the bark of old pine 

 trees. It also oviposits in the 

 terminal shoots of pine saplings, 

 dwarfing and permanently de 

 forming the tre e. Associated 

 with this weevil we have found 

 the smaller, rounder, more cylin- 

 240. Cut Worm and Moth. drical, whitish grubs of the 



Hylurgus terebrans, which mines the inner layers of the bark, 



slightly grooving the sap-wood. Later in April it pupates, 



and its habits accord in general with those of Pissodes strobi. 



Another Pine weevil also abounds at this time, as well as Otio- 



rhynchus picipes (Fig. 241), which injures 



beans, etc. 



Cylindrical bark-borers, which are little, 



round, weevil-like beetles, are now flying 



about fruit trees, to lay their eggs in the 



bark. Associated with the Pissodes, we 



may find in April the galleries of Tomicus 



piui, branching out from a common centre. 



They are filled up with fine sawdust, and, 



according to Dr. Fitch, are notched in the 



sides &quot;in which the eggs have been placed, 



where they would remain undisturbed by 



the beetle as it crawled backwards and forth 



through the gallery.&quot; These little beetles have not the long 



snouts of the weevils, hence they cannot bore through the 



outer bark, but enter into the burrows made the preceding 



year, and distribute the eggs along the sides (Fitch). Another 



Tomicus, more dangerous than the preceding, feeds exclusively 



241. Garden Weevil. 



