54 University of Michigan 



PLATE III 



The scales indicate a length of fifty microns. The relationships of 

 the centrals and laterals are represented as viewed. 



Fig. II. Oligyra (A)ialcadia) rufa. Centrals, laterals, and tips of 

 1st, 4th, and loth uncini. 



Fig. 12. Oligyra (Atialcadia) dysoni harhata. Centrals, and tips of 

 1st and 4th uncini. 



Fig. 13. Oligyra (Idcsa) rotunda. Centrals, and top of ist uncinus. 



Fig. 14. Oligyra (Scricca) riparia tacl'irciisis. Centrals, laterals, and 

 tips of 1st, 4th and "th uncini. 



