14 HUTMD/E. 



Synopsis of Indian Species. 



a. Dorsal surface of 5th segment of tail with 



compressed, elevated lateral keels ; the area 



between these keels strongly concave B. austraiis, p. 15. 



b. Dorsal surface of oth segment of tail with 



rounded or at most slightly elevated and 



granular lateral edges ; the area between the 



edges flat or lightly convex, with a median 



longitudinal depression. 



rt 1 . Inferior median keels of 2nd and 3rd caudal 



segments and the anterior border of lower 



side of 4th furnished with large paired 



lobate teeth ; anterior terga of abdomen 



with a transverse granular crest B. donee, p. 16. 



i) 1 . Inferior median caudal keels evenly or 

 almost evenly granular ; anterior terga of 

 abdomen without transverse granular 

 crest, 

 cr. Inferior lateral keels of 5th caudal seg- 

 ment not evenly granular, the granules 

 increasing in size and becoming denticu- 

 liform or lobate posteriorly. 

 a 3 . Median and posterior keels of carapace 

 in contact and forming a pair of con- 

 verging, nearly continuous ridges ; 

 distancebetween posterior ends of these 

 keels less than distance between pos- 

 terior margin of carapace and ocular 

 tubercle ; hairs on underside of tarsi 



longer, not spiniform B. macmahoni, p. 18. 



f/ J . Median and posterior keels of carapace 

 forming a pair of irregular interrupted 

 crests ; distance between their pos- 

 terior ends about equal to distance 

 between posterior edge of carapace 

 and ocular tubercle; hairs on under- 

 side of tarsi short and spiniform. 

 <('. Intercarinal spaces of tail smooth; 

 granules of inferior keels of 2nd and 

 3rd caudal segments increasing in 

 size posteriorly ; inferior lateral 

 keels of 5th more strongly lobate . . B. caucasius, p. 19. 

 //'. Intercarinal spaces of tail finely gra- 

 nular ; granules of inferior median 

 keels of 2nd and 3rd caudal seg- 

 ments not increasing posteriorly ; 

 inferior keels of 5th caudal seg- 

 ment less strongly lobate B. atrostriatus, p. 20, 



'r. I oferior lateral keels of 5th caudal segment 



evenly and finely granular throughout. 



a . Hand granular and furnished with 



finely granular keels; abdominal sterna, 



finely and closely granular: median 



and posterior keels of carapace forming [p. 20. 



an unbroken line It. acute-carmatus, 



