62 



NEW YORK STATE MUSEUM 



yellowish markings as seen in figure 5. The larva or grub producing the 

 pigeon tremex may be recognized by its cylindric form, the possession of 

 6 legs on the three anterior segments and by the prominent horn at its 

 caudal extremit)'. 



Life history and habits. Very little has been recorded concerning the 

 life history and habits of this conspicuous insect. The adults make their 

 way out of the trunk through a hole about the size of a common lead 



Fig. 5 Pigeon 

 side:*=headofl 



=larva showing the Thalessa lar 

 c=pupaof female; f/=nialepupa 



I fastened to its 

 er=adult female 



— all slightly enlarged. (After Riley, Ins. Life, i, U. S. Dep't Agric.) 



pencil, and during the summer months they are frequently found on diseased 

 maples and elm.s, sometimes with the stout ovipositor bent at right angles 

 to the body as the female inserts it with a wriggling motion. She is often 

 unable to withdraw her ovipositor and perishes on the tree. Occasionally, 

 the remains of a considerable number may be found about a single trunk. 

 A number of eggs are apparently deposited near together as the writer has 

 uncovered groups of young larvae quite near each other. It is also well 

 known that this species usually occurs in some numbers, if at all, in an 

 infested tree. The eggs have been described by Harris as oblong oval, 



