264 Proceedings of the Royal Physical Society. 



Explanation of Plates V., VI., VII., and VIII. 



The figures have all been drawn direct from specimens collected in the 

 Edinburgh district. In Plates YI., VII., VIIL, feet and mucrones are, 

 aa a rule, magnified 180, and antennae 60 diameters. The structural figures 

 (nearly all by G. H. 0. ) and those of the entire insects (all by W. E. ) were 

 drawn from different specimens. 



Plate V. 



Fig. 1. Sminthurus hortensis, Fitch ; x 37. From a Morningside specimen 



(1896) ; natural length 1'15 mm. (lettered n.s. = natural size). 

 Fig. 2. Sminthurus violaceus, Rent. ; x 50. From an Aberlady specimen ; 



length 75 mm. 

 Fig. 3. Sminthurus malmgrenii, TuUb., var. elegantuhos, Rent.; x 75. Bave- 



law Moss ; length "5 mm. 

 Fig. 4. Isotoma grisescens, SchiifF. ; x 31. Hallyards, near Ratho ; length 



2 mm. 

 Fig. 5. Isotoma sensihilis,Tvl\\i.; x 34. Dalhousie ; length 1 "75 mm. 2nd 



abdominal segment made rather long in fig. 

 Fig. 6. Isotoma schotti, Dalla Torre ; x 26. Beach west of Portobello ; 



length 2 mm. 

 Fig. 7. Achorutes longispinus, Tullb., var. scoticus, nov.; x 31. Bavelaw 



Moss ; length 1 '5 mm. 

 Fig. 8. Achorutes rufescens (Nic.) ; x 48. Longniddry; length 1 mm. 



Plate VI. 



Fig. 1. S7nintMirus 7iovemUneatus, Tullh., var. insignis,Reut. Antenna. 

 Fig. 2. „ ,, ,, „ ,, Foot (1st pair). 



Fig. 3. Sminthurus novemlineatus, Tullb., var. insignis, Reut. Dens and 



mucro from above ; x 60. 

 Fig. 4, Sminthurus novemlineatus, Tullb., var. insignis, Reut. Mucro from 



side. 

 Fig. 5. Sminthurus hilineatus, Bourl. Antenna. 

 Fig. 6. ,, ,, ,, Foot (3rd pair). 



Fig. 7. ,, „ ,, Dens and mucro from above ; x 90. 



Fig. 8. ,, ,, ,, Mucro from side. 



Fig. 9. Sminthurus hortensis, Fitch. Antenna ; x 150. 

 Fig. 10. ,, ,, ,, Foot (1st pair) ; x 200. 



Fig. 11. „ „ ,, Foot (3rd pair) ; x 200. 



Fig. 12. ,, ,, ,, Mucro ; x 200. 



Fig. 13. Sminthurus luteus, Lubb. Antenna. 



Fig. 14. ,, ,, ,, Foot (all three pairs are closely alike). 



Fig. 15. ,, ,, ,, Mucro. 



Fig. 16. Sminthurus quadrilineatus, Tullb. Antenna. 

 Fig. 17. ,, ,, ,, Foot (1st pair). 



Fig. 18. ,, „ „ Foot (3rd pair). 



