Thompson. — Anatomy of Mosquito. 
r 
PLATE 14. 
Figures 16-19 represent various types of pumping apparatus in the Diptera. 
Fig. 16. Section of head of Anthyomyia ; monantlial type. 
Fig. 17. Section of head of female mosquito; diantlial and post-neural type. 
Fig. 18. Section of head of Tipulid fly; diantlial and amphineural type. 
Fig. 19. Head of Tabanus atratus ; diantlial and preneural type. (Free hand.) 
Fig. 20. Alimentary canal of female mosquito with outline of body. (Free 
hand.) 
Fig. 21. Longitudinal section through stomach and ileo-colon of female 
mosquito. 
Fig. 22. Rectum of female mosquito. 
Fig. 23. Salivary gland of a newly emerged imago of Culex stimulans. ca = 
central acinus. 
Fig. 24. Mouthparts of a female pupa in which the hypopharynx (hyp) and 
proboscis canal (ptc) are forming; transverse section. 
Fig. 25. Hypopharynx and labium soon after the former is separated from 
the latter. Female pupa, transverse section. 
Fig. 26. Alimentary canal of mosquito larva with outline of body. (Free 
hand.) oes = esophageal valve. 
Fig. 27. Transverse section of wall of colon of a mosquito larva. 
Fig. 28. Degenerating midintestinal epithelium of a pupa one hour old. 
reg — regenerative nuclei. 
