INSECTS AFFECTING PARK AND WOODLAND TREES 459 



on the wing covers. These latter are as follows : A somewhat irregular 

 triangular spot at the basal third of each wing cover, an irregular, angu- 

 lated, transverse band, -at the apical third, and a short, oblique, subrectan- 

 gular spot near the apex. The mark at the basal third is 

 absent in some specimens. This beautiful buprestid bores 

 in maple, according to Mr Hunt. Dr Fletcher has found 

 it abundant on poplars, and it is recorded as rare in New 

 Jersey. 



White-horned maple borer 



Xyphidria albicornis Harr. 



A slender, blackish, wasplike insect about half an inch long and 

 with most of the antennae white, bores as a larva in diseased hard f - '", Bu P restls 



1 a s c 1 a t a, enlarged 



maple in July. (original) 



Examples of this interesting species were taken July 4, 1905, at Nas- 

 sau, on the underside of a dying sugar maple limb, evidently destroyed by 

 a fungous or bacterial affection. The foliage had wilted just a few days 

 before and discolored areas extended through the wood almost the entire 

 length of the limb, the abnormality being more evident at its base. The 

 bark" separated readily from the wood and an examination about the places 

 where the insects were found, showed masses of eggs evidently belonging 

 to this species, deposited in peculiar elongate cavities in the inner bark. A 

 favorite spot seemed to be at the very base of the limb, usually near an 

 elevated or rough portion of the bark. 



The eggs occurred in irregular masses of a few to about 15, were pure 

 white in color, about 1 mm long, fusiform and with a slender, transparent, 

 flagellate appendage about .75 mm long. The eggs were almost invariably 

 in slight cavities, possibly induced by sap collecting and fermenting in these 

 places. The smaller cavities were very slightly discolored while larger ones 

 apparently varied from dark brown to nearly black. Oviposition was so 

 abundant that 15 to 20 or more of these egg masses were easily found in 

 10 or 15 minutes work. This species undoubtedly bores in decaying hard 

 maple limbs in much the same way as X y p h i d r i a p r o v a n c h e r i Cress. 



