/Bgeriidse 



been transported to Australia, is an importation into this country 

 from Europe, It feeds in the stems of gooseberry- and currant- 

 bushes. 



(6) Synanthedon pictipes Grote & Robinson, Plate XLVl, 

 Fig. 24, ? . 



Syn. inusitata Henry Edwards. 



The larvae feed under the bark of plums, wild and cultivated 

 cherry-trees, peach-trees, the June-berry {Amelancbier), and the 

 chestnut. The eggs are laid on the trunks and the branches of 

 the trees. The moths are on the wing in June and July. 



(7) Synanthedon acerni Clemens, Plate XLVl, Fig. 28, ? . 



Syn. aiencoluni Gennadius. 



This is the common " Maple-borer." The larvae tunnel in the 

 sap-wood and do a great deal of damage to trees, especially in 

 our larger cities. At times trees are completely girdled by the 



galleries made by the insects, and 

 are thus killed; at other times they 

 are so weakened that on the occasion 

 of high winds or storms they are 

 broken ofi and greatly disfigured. 

 The insects emerge from the pupae 

 early in the morning, and may be 

 seen at times in small swarms about 

 the trunks of the trees, ovipositing 

 upon the bark. The time of emer- 

 gence is the latter part of May and 

 the beginning of June. The pupa^ 

 are formed in small cocoons com- 

 posed of silk and pellets of excre- 

 ment interwoven upon the surface. 

 Just before the moths emerge, the 

 chrysalids work their way partially 

 out of the tunnels in which they are, 

 and then the outer sheathing of the 

 pupa splits open and the perfect 

 insect crawls forth, in a few moments to be upon the wing; for 

 the development of the power of flight is with this species, as 

 with almost all the /Egeriida\ exceedingly rapid. 



The moth is found froin New England as far west as Nebraska. 



386 



Fic. 215. — S. acerni. rt', larvK ; 

 b, cocoons ; c, male ; </, pupa pro- 

 jecting from burrow. (After Riley.) 



