structure of Antennce. 



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 mates 

 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- 

 rectness of Huuser's conclusions. So that we now know 



Fig. II. 



Microscopic Styitctitfe oj Antenna, ajtey Schiemenz, 



n Nerves. 



c Cells. 



k 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, «) 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, h) 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, /) in the 

 antennae, Burmeister discovered the sensitive nerve-ending 



