Description of Plates. xliii 



PLATE III. 



All the figures in this plate are drawn from photographs. The ^%% 



when accompanying the ovipositor is drawn to the same scale. 



Ovipositors belonging to alternating generations bear the same 



numbers. 



Fig. 1. Ovipositor of Andricus cirratus, x 55. The terebra is with- 

 drawn, that the two plates, the muscles, and the seta, may be more 

 clearly displayed. 



1-5. The five muscles described in the text as moving the 



terebra. 

 h. The posterior plate, v. The anterior plate, h. The arch. c. 

 The horn. 5. The seta. p. The anal papilla, st. The sheath 

 of the terebra. 



Fig. 2. Ovipositor of Neuroterus laeviusculus. with ^^^ ( X30). 



Fig, 2". Ovipositor of Spathegaster albipes, with &%,^ ( X36). 



Fig. 3. Ovipositor of Neuroterus fumipennis ( X36;. 



Fig, 4, Ovipositor of Aphilotrix radicis. with egg f x 25V 



Fig. 4", Ovipositor of Andricus noduli, with &%z, (x36\ The 

 serrated spiculae are withdrawn. 



Fig 5. Ovipositor of Dryophanta scutellaris, with egg ( X30). 



Fig. 5^ Ovipositor of Spathegaster Taschenbergi, with &%% ( X36\ 



Fig. 6. Ovipositor of Biorhiza renum ( X36). 



Fig. 6», Ovipositor of Trigonaspis crustalis ( X30). 



Fig. 7. Ovipositor of Teras terminalis ( X30^. 



Fig. 8. Egg of Biorhiza aptera taken from the ovary direct ; the 

 adjoining figure exhibits one with the embryo ( x 200). The egg- 

 stalk is cut short. 



Fig. 9. Egg-tube from the ovary of Neuroterus fumipennis. Three 

 eggs are seen in the course of formation ( x ioo\ In the last, which 

 is the most developed, the formation of the egg-stalk is distinctly 

 seen. 



Fig, ID. Egg of Aphilotrix autumnalis. taken from a bud ten hours 

 after oviposition ( x 200;. The egg-stalk is shut off from the egg-cavity. 

 Its whole length is not shown. 



