206 The University Science Bulletin. 



PLATE XIX. 



Terminal. Segments of Abdomen; 



1. Female, first instar. 



2. Male, first instar. 



3. Female, second instar. 



4. Male, second instar. 



5. Female, third instar. 



6. Male, third instar. 



7. Female, fourth instar. 



8. Male, fourth instar. 



9. Female, fifth instar. 



10. Male, fifth instar. 



11. Female adult. 



12. Male adult. 



