1915.] NATURAL SCIENCES OF PHILADELPHIA. 95 



fifteen inches from the surface of the ground to its subterranean 

 sustenance, probably has a sub-nose that smeUs nothing save the 

 fungus whose odor emanates from the sandy soiL 



There is great significance in tlie fact that spiders and scorpions, 

 having no practical use for the sense of smell in their habitual activi- 

 ties, have no antennae. 



Summary. — If moths and butterflies, like certain ants, have a 

 compound nose, then one of the sub-noses guiding the habitual 

 activities of the male insect may function exclusively in cUscerning 

 the odor of the adolescent female. Elision of the whole antennae 

 would then prevent, as it possibly did in the case of Fabre's Oak 

 Eggers, a return under the allurement offered by the female. 



Moths and butterflies normall}- lacking such a sub-nose would 

 not be subject to this particular lure, although the antennae Avere 

 intact. 



This hypothesis fits the phenomena and explains what has here- 

 tofore been considered mysterious. 



Jacob Parsons Schaeffer, ]M.D., was elected a member. 



The following were ordered printed: 



