DESCRIPTIONS OF GENERA AND SPECIES. 



225 



either of the genera Saproglyphus or Madia known at 

 present. 



TABLE OF THE DIVISION OF THE TYROGLYPHIN^; INTO 



GrENERA. 



* I copulatrix 



J\-* ~\ TH -\ 'A' 



a projecting tubular bursa 



B. 



C. 



D. 



"j Female without projecting tubular bursa 

 I copulatrix ..... 



{No demarcation between cephalothorax 

 and abdomen .... 



Cephalothorax and abdomen plainly divided 

 by a distinct constriction or line . 

 Dorsal cuticle wholly chitinized and forming 

 a hood anteriorly, which hides the mouth- 

 organs from the dorsal aspect. Penis with- 

 drawn within the body when not in action 

 Dorsal cuticle soft, no anterior hood, penis 

 not withdrawn within the body when not 

 in action, but visible from the exterior 

 Penis emerging close to the hypostome, in 

 front of the epimera of the first pair of 

 legs ...... 



Penis emerging between the epimera of 

 the third and fourth pairs of legs . 



! ^Epimera of the first two pairs of legs of 

 the male joined to the sternum and to 

 each other, forming a continuous skeleton 

 Epimera of the second pair of legs of the 

 male not joined to the sternum 

 'Strong sexual dimorphism, particularly in 

 the form and size of the legs ; dorsal 

 cuticle, especially in the male, with nume- 

 rous chitinous plates embedded in it. No 

 genital suckers in either sex 

 Scarcely any sexual dimorphism and not 

 any in the legs ; no chitinous plates in 

 the dorsal cuticle ; genital suckers present 

 in both sexes .... 



{Male without anal (copulative) suckers 

 Male Avith conspicuous anal (copulative) 

 suckers ..... 

 rNo sternum ..... 

 H. [ A. sternum to which the epimera of the 

 first pair of legs are joined 

 Dorsal surface of the posterior margin of 

 the abdomen of the male prolonged so as 

 to form an overhanging shelf, which may 

 be either split into lobes or entire 

 Dorsal surface of the posterior margin of 

 the abdomen of the male not prolonged 

 so as to form a shelf 



15 



F. - 





GLYCYPHAGUS. 



B. 



C. 



G. 



D. 



E. 



CHOBTOGLYPHUS. 

 FUSACABUS, n. g. 



F. 



TBICHOTABSUS. 



HEBICIA. 



CABPOGLYPHUS. 

 SAPBOGLYPHUS. 



H. 



M^LIA. 

 I. 



HlSTIOGASTEB. 

 J. 



