288 Alexander Petriinkevitch 



In Heteropoda spiderlings they are directed somewhat sidewise 

 and nearly upward but more toward the front, while in the adult 

 they are directed straight upward and a little backward. 



The posterior side eyes in the spiderlings of all three species, 

 especially in Heteropoda, are directed a little frontward instead 

 of backward and in Lycosa less upward, also, than in the adult. 



The relative sizes of the eyes and of the distances between them 

 are also different for spiderling and adult. Tables V, VI, VII and 

 VIII may serve to illustrate this. 



T.\BLE V 



Lycosa nidicola. Diameter of eyes in millimeters 



TABLE VI 



Heteropoda venatoria. Diameter of eyes in millimeters 



Or in proportion to the anterior middle eyes 



