60 FOREST ENTOMOLOGY. 



Synoptsis of the Species. 



Size large, elytra contracted towards the extremity, without any distinct 

 patches ; body covered with greyish-yellow hairs ; legs dark 



S. car char ias. 

 Size smaller, elytra cylindrical ; thorax with yellowish side band ; 

 each elytron with four or five yellowish flecks . S. populnea. 

 I am indebted to friends for the specimens in my collection, but as 

 I have not had any opportunities of studying this genus in the forest, 

 the following account of the two species is taken from Professor 

 Fisher's 'Forest Protection' (Schlich, vol. v., 1907 edition). 



Sapbrda carcharias, L. (Large Poplar Longicorn). 



Description. Beetle (fig. 57) 23 to 30 mm. long, grey or brownish- 

 yellow, dotted with many shining black points. Thorax short and 



Fig. 58. Larva of Saperda 



Fig. 57. Saperda carcharias. (From ' Forest carcharias. (From 'Forest 



Protection,' by W. R. Fisher.) Protection,' by W. R. Fisher.) 



cylindrical. Elytra with the shoulders prominent, narrowed pos- 

 teriorly, and bluntly spined at the apex. 



Larva extending up to 36 mm. in length, without legs, cylindrical, 

 yellowish-white, with the mandibles and segmental shields brown, the 

 latter on the dorsal surface of segments 3-10, and the ventral surface 

 of segments 2-10 (fig. 58). 



Life-history. Season for flight : June and July. 



The eggs are laid in June in crevices in the bark of poplars, 

 especially near the ground. 



