32 
(Fig. 32) the head is brown with large darker patches on the sides, 
and a black band or blotch between the antennae. The abdominal 
feet have ten to fifteen hooks in each row. Both these species are 
Fig. 30. Small poplar infested with sesiid borers (Memythrus). 
distinguished from some other borers of their family by the fact 
that the first segment of the thorax bears two oblique dark marks, 
approaching each other behind. 
