228 



ORTHOPTERA 



CHAP. 



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 Stilopyga orient- 

 alls 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 colleterial gland. 

 In this chamber the egg-case is 

 formed from the secretion of the 

 gland just mentioned. According 

 FIG. 125. Alimentary canal of stilo- to Miall and Denny, 1 there is a 



vyqa oriental-is. (After Dufour. ) e, , . , . , 



Head ; b, salivary glands ; c, saiiv- spermatheca which opens not into 



ary reservoir ; d, crop ; e, diver- the uterus but into the cloacal 

 ticula placed below proventriculus ; . . 



/, stomach ; g , small intestine ; h, chamber behind it. Lowne doubts 

 rectum; i Malpighian tubes; k, thig diverticulum being a true 



extremity of hind body. 3 



spermatheca. The manner in which 

 the eggs are fertilised and their capsule modelled is uncertain. 2 



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 def'erens. 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." * 



1 The Cockroach, p. 170. 



- Cf. Duchamp, Rev. Sci. Nat. Mowtpellier, vii. [? 1879], p. 423. 



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



