THE OLFACTORY SENSE OF COLEOPTERA. 



413 



Fig. 2. Position of olfactory pores on legs of beetles, X 8; A-F, legs of lady 

 beetle, Epilachna borealis, showing position of groups 5, 6, & and c of olfactory pores. 

 The drawing of each leg in which the tarsus (Tar) is shown represents the outer 

 surface of that leg, and the drawing not showing the tarsus represents the inner 

 surface of the same leg. A, right front leg; B, left front leg; C, right middle leg;; 

 D, left middle leg; E, right hind leg; F, left hind leg. G, distal end of tibia from front 

 leg of Epicauta marginata, showing five olfactory pores on one of the two tibial 

 spines. 



consists of 55 pores; No. 3 of 43 pores; and No. 4 of 43 pores. 

 On the left wing, No. 2 consists of 50 pores; No. 3 of 43 pores; 

 and No. 4 of 46 pores. 



Group a of the scattered pores lies on the ventral surface of the 



