!28 



ORTHOPTERA 



on account of the capacious crop, and the small gut-like, chylific 

 ventricle ; eight elongate pouches are situate on this latter part 



at its junction with the gizzard. 



The Malpighian tubules are 

 very numerous and delicate ; there 

 are extensive salivary glands and 

 reservoirs ; and on the anterior 

 part of the true stomach there are 

 eight caecal diverticula. The great 

 chain of the nervous system con- 

 sists in all of eleven ganglia — two 

 cephalic, three thoracic, and six 

 abdominal. 



The ovaries in Stilojyyga orient- 

 alis consist each of eight egg-tubes, 

 placed at the periphery of a common 

 receptacle or oviduct, the pair of 

 receptacles themselves opening into 

 a common chamber-; — the uterus — 

 which is surrounded by a much 

 branching serific or coUeterial gland. 

 In this chamber the effp--case is 

 formed from the secretion of the 

 gland just mentioned. According 

 Fig. 125.— Alimentary canal of Siiio- to Miall and Dennv,^ there is a 



pygaorientalis. (After Dufour.) c, i • i 



Head ; I, salivary glands ; c, sallv- Spemiatheca wllich openS not into 



ary reservoir ; d^ crop ; e, diver- 

 ticnla placed below proventriculus ; 

 /, stomacli ; g^ small intestine ; /;, 

 rectum ; i, Malpigliian tutes ; k, 

 extremity of liind body. 



the uterus but into the cloacal 

 chamber behind it. Lowne doubts 

 this diverticulum being a true 

 sperniatheca. The manner in which 

 the eggs are fertilised and their capsule modelled is uncertain.^ 



The internal reproductive organs of the male are very com- 

 plex in Stilopyga orientalis ; each testis consists of a number 

 (30 to 40) of vesicles placed on a tube which is prolonged to 

 form the vas deferens. There is a very peculiar large complex 

 gland consisting of longer and shorter utricles, opening into the 

 vesiculae seminales, and forming a " mushroom-shaped gland." * 



■^ The Cockroach, p. 170. 



" Cf. Duchamp, liev. Sci. Nat. Monfjie/lier, vii. [?1879], p. 423. 



' Huxley, Manual Anat. Invert. Animals, 1877, p. 416. 



