NO. l8 



SENSE ORGANS OF COLEOPTERA — McINDOO 



47 



winged species examined, 1 1 had only one group of pores on each 

 wing, 21 had two groups on each wing, 12 had three groups on each 

 wing (C, 2, 5, and ^/), and 3 had four groups on each wing. The 



Fig. 9. — Position of sense organs on legs of adult beetles ; dots, marked 5 

 and 6, and c and /, being olfactory pores ; and St, tactile hairs. A to F, legs of 

 Mexican bean beetle, X 12 ; and G, distal end of tibia from front leg of Ep-icauta 

 marglnata, showing 5 olfactory pores on tibial spine. The drawing of each leg 

 in which the tarsus is shown represents the outer surface and the portion of leg 

 without 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; and F, left hind leg. 



number of ix)res on a pair of wings ranged from 130 to 982. The 

 number of pores counted on all six legs of an individual ranged from 

 49 to 341. There were usually two groups of pores on each trochanter 

 (fig- 9» 5 ^"tl ^)- Sometimes a pore was found at the proximal end of 



