Diaptoimis stagnalis Forbes. 

 Fig. 



1. Female from above. 



2. Male from above. 



3. Portion of male right antenna — a variant. 



4. Stylet of the female. 



5. Fifth foot of the female. 



6. Fifth feet of the male. 



7. Antennule. 



8. Maxilliped. 



9. First foot of the male. 



10. First foot of the female. 



11. Third foot of the male. 



12. Fourth foot of the male. 



All the figures from camera drawings. From specimens secured in 

 Granville, Ohio, in spring. 



