INSECTS AFFECTING PARK AND WOODLAND TREES 



537 



Typophorus canellus I abr. 



A small, roundish, brown and Mack niarkt-d or l)la< k l)cetle about '/',(, inch long 

 occurs on butternut, mountain ash and \arious plants in May anil during early fall. 



This species is a variable one, as is illustrated by Dr Horn's ke\' for 

 the separation of 14 varieties. It has been taken by Mr Yoiinj^ on butter- 

 nut, mountain ash and such low plants as 

 strawberries in IMa\', and on the heathlike 

 aster, Aster e r i c o i d e s, the last of 

 August and the first of September. It eats 

 irregular, oval or elongate holes in almost 

 any part of mountain ash leaves and occa- 

 sionally causes considerable injury. Mr 

 Youne is of the opinion that a similar form 



*» ' Fig. 135 Typophorus ..111 el 1 11 s, showing 



occurring on low plants, may be different dark and llght forms, much enl.nrged (original) 



from that met with on trees, though at present he is not able to detect con- 

 stant differences. This species, according to Dr Horn, is widely distributed 

 over the continent east of the Rocky mountains, occurring from Kansas to 

 Texas, west through Arizona to Fort Yuma. 



Green-striped maple worm 



Aiiisofa ritbiciinda Fabr. 



A large, pale yellowish green larva striijed with darker green, occurs in midsummer 

 on maple trees. 



This species is generally distributed throughout the State, though 

 rarely abundant enough to cause serious mischief. The late Dr Lintner, 

 however, records an instance of this larva occurring in large numbers in 

 Monticello, Sullivan co., where it defoliated a number of soft mapletrees. 

 This .species is much better known as a pest in the Western States, where 

 it frequently strips the leaves from large numbers of maples. It feeds on 

 the sugar maple as well as the soft maple. 



Description. The larva has been described by Dr Riley practically as 

 follows : 



