f 

 \ 



11 



I 



Nothrus 69 



) Abd. shield-shaped, pointed posteriorly 5. 

 | Abd. not pointed posteriorly 6. 



f Cuticle finely reticulated L. 360 |u 18. N. tardus .... p. 74 



1 \ Cuticle smooth. -- L. 600 |u 9. N". glaber . . . . p. 71 



f Psstg. org. filiform 7. 

 \ Psstg. org. clavate 10. 

 Abd. truncated posteriorly 8. 

 Abd. rounded posteriorly 9. 

 Hairs on Dors, of Abd. setiform; the pair on 

 post, corners 4 times as long as the others 



on post, margin. L. 1,1 mm 13. KT. palustris ... p. 72 



Hairs on Dors, of Abd. spatulate or rod-like ; the 

 pair on post, corners not twice as long as the 



others on post, margin. L. 800 |u .... 1. M". anauniensis . . p. 70 

 Dors, of Abd. convex; hairs thereon clavate . . 4. N. biciliatus . . . p. 70 

 Dors, of Abd. concave, hairs thereon setiform. 



[ L. 700 n 2. N. banks! .... p. 70 



/ Spines on lat. margin of Abd. as long as width 

 of Abd. and arising from apophyses which 

 10 ' project beyond the margin 11. 



I Spines (or hairs) on lat. margin of Abd. short; 

 no projecting apophyses - 12. 

 Apophyses long; Abd. oblong, truncated and 

 slightly concave posteriorly, the 2 apophyses at 

 postero-lateral corner of Abd. with bulbous 



proximal parts. L. 900 |U 16. N. spinifer .... p. 73 



Apophyses short; sides of Abd. somewhat curved, 

 it is narrowed and deeply bifid posteriorly, 

 apophyses at postero-lateral corners without 



bulbous bases , . . 6. N". echinatus ... p. 71 



/ Im. carrying the cast skin of post, margin and 

 of 2 long conical projections at post, angles 



12 . of Abd. of Nph., these enclose the same part 



in Im. as in a bag. L. 0,8 1,2 mm . . . 15. N". segnis . . . . p. 73 

 I Im. not carrying any cast skin. - - 13. 

 I Post, margin deeply incised (emarginate) 14. 



13 { Post, 'margin truncated or slightly concave or 



convex 15. 



Incision comencing near lat. margin, causing post, 

 margin to be bifid; Dors, of Abd. flat without 

 raised margin ; 6 clavate hairs on post, margin. 



L. 700 |u 7. N". excisus . . " . . p. 71 



Incision only central; Dors, of Abd. with strongly 

 raised margin ; 4 pectinated hairs with reflexed 

 distal ends on post, margin; central pair 

 transverse and nearly as long as Abd. - 



L. 700 n 8. N. flagellatus . . p. 71 



j Post, margin with a broad central projection 

 lower in level than the Dors, of Abd. 16. 

 I Post, margin without any central projection 17. 



/ Central projection with small tubercles at corners 



each bearing a large thick hair. -- L. 800 |u 10. N. horridus . . . p. 71 

 ' Central projection with very large, almost 



cylindrical tubercles at corners, each bearing 



a very small sharply curved hair. L. 1 mm 5. N". biverrucatus . p. 71 



