INJURIOUS AND BENEFICIAL INSECTS 



19 



, "T^r — ^\ ^ ^^ ^^^^^ -" ^-jz~ '• f 



Fig. 24 Lunate long sting ovipositing 



slender ovipositor or '' tail " 2 to 4 inches long. It frequents elms 



and maples infested by the pigeon Tremex, and occasionally is 



found with the ovipositor 



stuck in the wood. The 



characteristic attitude of 



this parasite when forcing 



its long ovipositor into the 



wood is well shown in the 



accompanying figure. The 



white legless grubs attach 



themselves to the borers 



and suck their life out. 



This insect should therefore 



he protected. 



33 Cottony maple tree scale insect (Pulvinaria innumer- 

 abilis). The under side of smaller limbs of soft maple are 



sometimes festoon- 

 ed with this cot- 

 tony insect, though 

 more frequently it 

 occurs in small 

 masses. The young 

 appear in July. 

 Sometimes this in- 

 sect is very in- 

 jurious on Long 

 Island and occa- 

 sionally is abun- 

 dant in other sec- 

 tions of the state. 



Treatment: spray 

 young with kero- 

 sene emulsion or 



whale oil soap solution. Brush or scrape off and destroy the old 



scales. 



34 Sugar maple borer (Plagionotus speciosus). Dis- 

 eased or loose bark and exposed dead wood indicate the work of 



Fig. 2b Cottony maple tree scale Insect. Adult females on 

 twigs with eggs sacs— natural size (after Howard; U. S. dep't 

 agr., div. ent. bull. 22, n. s.) 



