51. 



29. Spear more than 23u long »» ..,...»,. , , obscurus Allen, 1955 

 Speai' less than 22u long <i««99es.o8e»o.«...o...30 



30. Spear more than l5u long, tail less than 3 X anal body diameter ... 



..««. no thus Allen, 1958 



Spear not more than l5u long, tail more than 3 X anal i.'ody diameter • 

 "... . nanus Allen, 1950 



31. lip region continuous with body contour 32 



lip region set off by constriction or depression. 31; 



32. Tail short, conoid, terminus pointed. . . . brachycephalus Allen, 1955 

 Tail subcylindriacl, bluntly rounded » • 33 



33. Spear less than 20u long , . brevidens Allen, 1955 



Spear more than 20u long af finis Allen, 1955 



31;. lip sclerotization heavy, conspicuous • .....35 



Lip sclerotization faint, inconspicuous 37 



35. Tail more than 3 X anal body diameter alpinus Allen, 1955 



Tail less than 3 X anal body diameter 36 



36. Spear more than 35u . . macrodens Allen, 1955 



Spear less than 35u long grandis Allen, 1955 



37. Spear less than 35u long lineatus Allen, 1955 



Spear more than 3B^ long 38 



38. Spear more than 55u long; tail less than 2 X anal body diameter ... 



.......... superbus Allen, 1955 



Spear less than 55u long; tall more than 2 X anal body diameter . . . 

 conicus Allen, 1955 



Other species: 



T. paucus Kirjanova, 1951 



T. graminicola Kirjanova, 1951 



T. bucharicus (Tulaganor, 19lj9) Tulaganov, 195U 



T. caromatus (Tulaganov, 19U9) Tulaganov, 195U 



T . spinicaudatus Schuurmans-Stekhoven, 19hU 



