78 - NEW YORK STATE MUSEUM 



4 Section of alder stem showing the method of work of the 



larva of S. o b 1 i q u a 



5 S. vestita, female 



6 S . o b 1 i q u a 



PLATE 6 



Saperda fayi 



Thorn borer 

 A Branch of the thorntree showing the galls and work of this 

 species 



1 An old gall wath a larger one just below it 



2 Section of a fresh gall showing the work of the larva 

 2a Borings in the stem 



3 Exit hole of the beetle in section 



4 Adult, enlarged 



Saperda puncticollis 



Virginia creeper borer 

 B Portion of Virginia creeper, representing the galls and work 

 of this species 



5 Section of the stem, showing the pupal chamber 



6 Larva at work under the bark 



7 Exit hole in section 

 7a Exit hole 



8 Section of thin bark and saw^dust stopper closing opening to 



pupal chamber 

 8a Same shown in a surface view^ 



9 Beetle, enlarged 



Saperda concolor var. unicolor 



Willow borer 

 C Branch of poplar, showing the galls and work of this insect 



11 Fresh galls and exit holes of beetles 



12 Fresh gall cut open and showing the pupal cells: one empty, 



one occupied, and one extending up and the other down 



13 Section of old gall showing the internal appearance of the 



tissues 



14 External appearance of old galls 



15 Beetle, enlarged 



