MOLE-CRICKET 



335 



present peculiarities worthy of notice. Salivary glands and 

 reservoirs are present ; the oesophagus is elongate, and has on 

 one side a peculiar large pouch (Mg. 207, c); beyond this is tlie 

 gizzard, which is embraced by two lobes of the stomach. This 

 latter organ is, beyond the lobes, continued backwards as a 

 neck, which subsequently becomes larger and rugose-plicate. On 

 the^ neck of the stomach there is a pair of branching organs, 

 which Dufour considered to 

 be peculiar to the mole- 

 cricket, and compared to a 

 spleen or pancreas. The single 

 tube into which the Mal- 

 pighian tubules open is seated 

 near the commencement of 

 the small intestine. These 

 tubules are very fine, and are 

 about one hundred in num- 

 ber. The arrangement by 

 which the Malpighian tub- 

 ules open into a common diict 

 instead of into the intestine 

 itself appears to be charac- 

 teristic of the Gryllidae, but 

 is said to occur also in 

 Epliippigera, a genus of 

 Locustidae. According to 

 Leydig ^ and Schindler the 

 Malpighian tubules are of 

 two kinds, differing in colour, 

 and, according to Leydig, in 



contents and histological Fig. 207.— Alimentary canal and appendages of 



. tile mole - cricket : ti, head ; 6, salivary 



structure. ISIear the posterior 



extremity of the rectum 



there is a loljulated gland 



having a reservoir connected 



with it ; this is the chief 



source of the foetid secretion the mole-cricket emits when seized. 



The nervous chain consists of three thoracic and four abdominal 



ganglia ; these latter do not extend to the extremity of the body ; 



1 MuUer's Arch. 1859, p. 159. 





glands and recei^tacle ; c, lateral pouch. ; c?, 

 stoniato -gastric nerves ; e, anterior lobes of 

 stomach ; /, peculiar organ ; g, neck of 

 stomach ; h, plicate portion of same ; -i, rec- 

 tum ; k^ lobulate gland ; /, extremity of body ; 

 ?;tj Malpighian tubes. (After Dufour.) 



