Structure of Antenna. 



57 



Insects often find their mates when to us it would seem 

 impossible. Thus I have known hundreds of male moths 

 to enter a room by a small opening in a window, attracted 

 by a female within the room. I have also known them 

 to swarm outside a closed window lured by a female within. 

 Male insects have even been known to reach their mate^ 

 by entering a room through a stove-pipe. Yet Hauser 

 found that this ability was gone with the loss of the 

 antennae. Kraeplin and otliers have since proved the cor- 

 i-ectness of Hauser's conclusions. So that we now know 



Fig. II. 



Microscopic Structure of Antenna, after Schiemenz. 



n Nerves. 

 c Cells. 



h Tooth hairs. 

 / Pits or pori. 



that the antennae, in most insects at least, contain the organs 

 of smell. Histologically this apparatus is found to con- 

 sist of nerves (Fig. lo, n) which run from the brain to 

 the antennae and at the outer, sensitive end, contain a 

 cell (Fig. II ) with one or more nuclei. These nerves 

 may end in perforated, tooth-like hairs on the antennae 

 (Fig. II, '^) in pegs which have no chitinous sheath, 

 which push out from the bottom of pits— pori, which exist 

 often in great numbers in the antennae (Fig. ii). While 

 Erichson first discovered the pits (Fig. ii, p) in the 

 antennae, Burmeister discovered the sensitive nerve-ending 



