CONSTITUTION AND DEVELOPMENT OF TERMITES. 321 
Rieut Sipe (Empta). 
Fig. 1.—Ventral ganglionic chain; L. 1 = anterior, L. 2 = middle, L. 3 
= posterior leg. 
Fic. 2.—Dorsal view of the tracheal system (the stigmata are numbered). 
Fig. 3.—Alimentary canal. gl. sal. = salivary glands. int. ant. = oeso- 
phagus and proventriculus. zz¢. med. = chylific ventricle. zt. post. = in- 
testine. 
Fic, 4.—Ovarian tubes and oviducts (ovd.). seg. med. = segment médiaire 
(the successive abdominal segments are numbered). 
Fig. 5.—Male generative organs. 
Fic. 6.—Posterior extremity of the male. proc. dext. = right, proc. sin. 
= left apophysis. cer. dext. = right cercus. 
Fic. 7.—Labium and labial palpus of one side. 
Fic. 8.—Maxillary lobes and palpus. 
Fie. 9.—Anterior tarsus (seen obliquely from the side). 
Fic. 10.—Middle tarsus (idem). 
Fic, 11.—Posterior tarsus (idem). 
PLATE 20. 
Parasitic Protozoa of Termitide. 
The figures are all drawn with a Koritska microscope, ocular 5, objective +, 
Leitz. The dotted lines represent the continuation of the unbroken lines on 
the remote face. 
Fig. 1.—Trichonympha agilis, in optical section, nearly corresponding 
with the middle plane of the body. 
Fic. 2.—The same, at a somewhat different level. 
Fic. 3.—The same, in a superficial plane. 
Fic, 4.—The same, partly schematic, to show the arrangement of the 
flagella. 
Fie. 5.—The same, to give an idea of the complicated arrangement of the 
spicules in some examples. 
Fic. 6.—Joenia annectens. 
Fic. 7.—Idem. 
Fic. 8.—Idem. 
Fie. 9.—Endoskeleton and nucleus of a very large example of Joenia in 
optical section. 
Fic. 10.—Microjoenia hexamitoides. 
