Folsom. — Mouth- Parts, Orchesella eincta. 



PLATE 3. 



Fig. 18. Dorsal aspect of the framework of the left maxilla ; from a dissection. 

 X 116. 



Fig. 19. Dorsal aspect of the head of the right maxilla ; from a dissection. X 530. 



Fig. 20. Dorsal aspect of the left maxilla, with most of its muscles. Reconstructed 

 from serial sections, aided by dissections. X 116. 



Fig. 21. Dorsal aspect of the more ventral portion of the left maxilla ; supplemen- 

 tary to Fig. 20. From serial sections and from dissections. X 116. 



Fig. 22. Dorsal aspect of the right paraglossa, with underlying glossa ; from dis- 

 sections. X 440. 



Fig. 23. Dorsal aspect of the glossa ; from dissections. X 440. 



Fig. 24. Ventral aspect of the right half of the labium ; from a dissection. X 220. 



Fig. 25. Dorsal view of the left half of the labium ; reconstructed. X 220. 



Figs. 26 and 27. Transverse sections of the linea ventralis. X 530. 



