VISION IN INSECTS. 



125 



a, Eyes of Mygale aviculana 



O O 



o o 







o 00 o 



o o o o 



&, Eyes of Mygale ccementaria and c, Lycosavorax. 



O O 



O o O 



d, Eyes of Dolomedes marginalusand <?, Cfenws dubius. 



'f 



O O 



O 



a o 



o o 



/, Eyes of Sphasus indianus and g, 



oo /r 



1 9 



O o i 



o o 



7i, Eyes of Eresus cinnabcrintts and t, TAomtsws citreus. 



>0 0< 



oooo 



00 



o o 



7i, Eyes of Ciubiona accentuataand I, Pysdera erytkiina. 



if 3 



