322 The Ohio Journal of Science [Vol. XVI, No. 7, 



EXPLANATION OF PLATES. 



Plate XX. 



Fig. L Ventral view of head of Draeculacephala moUipes. 



Fig. 2. Head of Deltocephalus inimicus. Ventral view. 



Fig. 3. Head of Agallia sanguinolenta. Ventral view. 



Fig. 4. Head of Deltocephalus inimicus. Caudal aspect. 



Fig. 5. Head of Draeculacephala moUipes. Caudal aspect. 



Fig. 6. Mandible of Deltocephalus inimicus. 



Fig. 7. Maxilla of Deltocephalus inimicus. 



Fig. 8. Salivary pumping apparatus of Deltocephalus inimicus. 



Fig. 9. Cross section through head and eyes of Deltocephalus inimicus. 



Fig. 10. Cross section through pharnyx of Deltocephalus inimicus. 



Fig. IL Cross section through anterior of clypeus of Deltocephalus inimicus. 



Fig. 12. Cross section through labium of Draeculacephala mollipes. 



Fig. 13. View of labium of Draeculacephala mollipes. 



Fig. 14. Labrum and epipharynx of Draeculacephala mollipes. 



Fig. 15. Side view of salivary pumping apparatus of Deltocephalus inimicus. 



Fig. 16. Mandibular seta of Deltocephalus inimicus. 



Fig. 17. Maxillary seta of Deltocephalus inimicus. 



Plate XXL 



Fig. 18. Antenna of male Idiocerus. 



Fig. 19. Antenna of Deltocephalus inimicus. 



Fig. 20. Antenna of Cephalelus infumatus. 



Fig. 21. Antenna of Gypona sp. 



Fig. 22. Longitudinal median section through Draeculacephala mollipes (semi- 

 diagrammatic). 



Fig. 23. View of food reservoir. 



Fig. 24. View of food reservoir. 



Fig. 25. Ventral view of genitalia of Phlepsius irroratus. (male.) 



Fig. 26. Side view of male genitalia of Phlepsius irroratus. 



Fig. 27. Penis of Deltocephalus inimicus. 



Fig. 28. Side view of inner valves of ovipositor of Deltocephalus inimicus. 



Fig. 29. Ventral view of female genitalia of Draeculacephala mollipes. (Valves 

 of ovipositor dissected free). 



Fig. 30. Side view of ovipositor and female genitalia of Deltocephalus inimicus. 



~' " Ventral view of female genitalia of Phlepsius irroratus. 



Fig! 3L 



Fig. 32. 



Plate XXII. 



General dissection of Central Nervous System of Draeculacephala 

 mollipes (semi-diagrammatic). 

 Fig. 33. General dissection of the tracheal system of Deltocephalus inimicus. 



(vSemi-diagrammatic. ) 

 Fig. 34. View of digestive system of Athysanus exitio.sus. 

 Fig. 35. General dissection of the male reproductive organs. 

 Pig. 36. General dissection of the female reproductive organs. 



