92 



NEW YORK STATE MUSEUM 



Remedies. It is impossible to control this insect on other than 

 valuable trees, and for such, digging out the borers, with possibly recourse 

 to the use of repellant washes is about all that can be done, and in the 

 majority of cases should afford considerable protection. 



Bibliography 



1904 Felt, E. P. & Joutel, L. H. N. Y. State Mus. Bui. 74, p. 54-58 



Ash borer 

 Podoscsia fraxiiii Lugger 



Boring ash trunks, a white, sparsely haired caterpillar. 



This species is very closely allied to P. syringae and according to 

 Dr Lugger, its describer, is very common in the prairie regions of Min- 

 nesota and South Dakota. It also occurs in Montana. It seriously 

 injures the ash and attacks that tree when it is grown for wind-breaks. 

 It is so destructive that, as a general rule, the trees are unable to 

 attain a large size before they begin to break down. All parts of the trees 

 are infested though the borers are more commonly found just below the 

 surface of the soil. The young trees succumb easily while larger ones may 

 survive the attack for many years. 



Description. Illalc. Head black between the eyes ; face dirty whitish ; 

 palpi dull orange, mixed with some black hairs ; collar reddish orange in 

 front, yellow behind. Antennae rufous. Thorax blackish, with the patagia 

 becoming yellow posteriorly ; transverse mark at base of thorax yellow. 

 Abdomen black, with a yellow band at the posterior end of each segment, or 

 the last four segments are wholly yellow, or are marked with orange at the 

 sides, sometimes extending almost over the whole surface of .the last three. 

 Fore wings opaque except a short transparent and orange brown basal 

 streak, with the discal mark heavier, veins at base sometimes stained with 

 red; underside golden yellow. Hind wings transparent, margin and veins 

 yellowish brown, underside stained with yellow. 



Female. Similar to the male, but more robust and larger. Expanse : 

 male, 25-30 mm; female, 30-35 mm. Bcutentniillcr 



