INSECTS AFFFXTING PARK AND WOODLAND TREES 



"3 



fulvescens Brulle, recorded as a secondary parasite of Pimplas, was 

 common at Slingerlands, and a considerable number were reared from 

 cocoons. Anomalon exile Prov. was reared in small numbers from 

 cocoons received from Lyons Falls and Glens I'alls. Pteromalus 

 vanessae How. was also obtained from the latter place. The followinj^ 

 dipterous parasites have been recorded by Mr Coquillett : E u p h o r o c e r a 

 c 1 a r i p e n n i s Macq., F r o n t i n a f r e n c h i i Will, T a c li i n a m (> 1 1 a 

 Walk. This latter species was reared by us in sufficient numb(-rs in igoo 

 to show that it was of considerable importance in a number of localities. 

 Several predaceous insects prey on the caterpillars. One of great value 

 is Calosoma scrutator Fabr., a species which Dr Riley characterized 

 as most efficient. The beautiful and equally ferocious Calosoma cali- 

 dum Fabr., is another valuable enemy, as stated 

 by William Saunders. Mr Burgess records that 

 Calosoma w i 1 c o .x i LeC. fed readily in con- 

 finement on the larvae of this insect. Two pre- 

 daceous hemiptera, Podisus placidus Uhler 

 and P. s e r i e V e n t r i s Uhler, as stated by Kirk- 

 land, feed on the caterpillars. A mite, ? T r o m- 

 b i d i u m sp., was discovered by William Saunders 

 destroying many clusters of eggs. 



Whenever cocoons of the forest tent caterpiller are collected, they 

 should be placed in a box and covered with a rather coarse wire netting, 

 about 3 jg inch mesh, so as to confine the moths but allow the beneficial para- 

 sites to escape. 



Remedies. As a large proportion of the eggs of this species occur on 

 twigs within 20 or 30 feet of the ground, something can be accomplished in 

 winter by cutting off the infested twigs and burning the egg clusters, 

 specially if the trees are not very large. But in the case of good sized 

 maples, it is very doubtful if this could be done to advantage, and even 

 with moderate sized trees there would probably be enough inaccessible egg 



