450 N. E. MCINDOO. 



off, 4 of the II species tested were normal and 7 were slightly 

 abnormal in behavior. After the elytra and wings were pulled 

 off I species was normal while 4 were slightly abnormal in 

 behavior. After the elytra were pulled off and the wings were 

 cut off, the I species tested was normal in behavior. After the 

 elytra and wings were pulled off and the pores on the legs were 

 covered with vaseline, the i species tested was slightly abnormal 

 in behavior. After the elytra were pulled off, the bases of the 

 wings glued and the pores on the legs covered with vaseline, 

 the I species tested was normal in behavior. 



Four unmutilated species responded to odors more slowly than 

 did the same species after the antennae had been pulled off. This 

 is explained by the fact that most beetles are more or less " timid " 

 for some time after being caught, and some feign death. As a 

 rule, the longer they are confined and the more they are handled, 

 the more satisfactory they are to experiment with. Five species 

 without antennae responded to odors as promptly as did the same 

 species unmutilated. Two species without antennae responded 

 to odors more slowly than did the same species unmutilated. 

 Since these were abnormal in behavior and judging from the 

 reaction times of the other 9 species with antennae pulled off, it is 

 only reasonable to attribute the slow reaction times of these 

 two species to their abnormal condition caused by the antennae 

 being pulled off. The 6 species so mutilated that most of their 

 olfactory pores on the elytra and wings were prevented from 

 functioning responded from 2 to 5 times more slowly than 

 did the same species unmutilated or with the antennae pulled off. 

 The two species so mutilated that most of their olfactory pores 

 on the elytra, wings and legs were prevented from functioning 

 responded from 2 to 6 times more slowly than did the same 

 species unmutilated or with the antennae pulled off. 



From all the preceding results, it seems that the antennae do 

 not carry any of the olfactory organs, while the olfactory pores 

 found on the peduncles of the elytra, on the dorsal surfaces of 

 the wings, on the trochanters, tibiae, sometimes on the femurs and 

 tarsi, and perhaps on the mouth appendages, are the true ol- 

 factorv oreans in beetles. 



