284 



Alexander Petrunkevttch 



ably upward. In this respect Heteropoda venatoria resembles 

 Lycosa more than it does .Phidippus, since its anterior middle 

 eyes are also directed frontward but still more outward and con- 

 siderably upward although not so much so as in Lycosa. 



TABLE I 



Projection on the horizontal or joundation plane. S e Figs. I, 2 and ^ 

 The angles which the axes of the eyes form with the plane of symmetry. The right side with a plus, the 



left with a minus sign 



Phidippus tripunctatus 



Lycosa nidicola 



Heteropoda venatoria., 



AME 



ASE 



PME 



± 



± 



24 

 27 



67 

 24 



PSE 



95 



94 



109 



TABLE II 



Projection on the transverse or vertical plane. See Figs. 6, 8 and Q 

 The angles which the axes form with the plane of symmetry. Signs as before 



Phidippus tripunctatus ; it 



Lycosa nidicola it 



Heteropoda venatoria zh 



TABLE III 



Projection on the plane of symmetry. See Figs. 4, 5 ^'^d 7 

 The angles which the axes of the eyes form with the horizontal or foundation plane. Zero in front of the 

 head, 180° at the back. Positive quantities for eyes looking upward, negative for those looking down- 

 ward. 



AME 



Phidippus tripunctatus i — 2 



Lycosa nidicola 1 + '4 



Heteropoda venatoria + 8 



The anterior side eyes in Phidippus are so directed that their 

 axes are parallel to the horizontal or foundation plane and turned 

 a little sidewise. In Lycosa they are directed a little more out- 

 ward and at the same time downward. In Heteropoda they are 

 directed still more outward but at the same time upward. 



