130 ECONOMIC ZOOLOGY AND ENTOMOLOGY 



minute pits and cones or papillae which are the organs of smell 

 and are stimulated by substances in gaseous or otherwise 

 very finely divided condition, may be very abundant, several 

 thousand being present on each of the bee's antennae. 



FIG. 52. Different kinds of insect antennae, i, From a ground beetle, 

 Pterosliclnts calif ornic us; 2, from a carrion beetle, Silplu ramcsa; 3, from a 

 click beetle, Melanotus variolatus; 4, from a honey-bee, Apis mellifica; 

 5, from a Scarabaeid beetle, Li gyms gibbosus; 6, from a blow fly, Calli- 

 phora wmitora. (About 12 times natural size.) 



Eyes and Sight. On the head, also, beside the antennae 

 and mouth-parts, are the eyes. These are of two kinds, namely 

 a pair of large compound eyes and three smaller simple eyes or 



