216 ANNALS OF SCOTTISH NATURAL HISTORY 



Herpobdella octoculata (L.). Also a couple of this species. 



Asellus aquaticus (L.). During April and May, 1905, this crustacean 

 was so plentiful in the loch that at least half a dozen occurred 

 in every haul of a small hand-net. This is especially interest- 

 ing, seeing that Scott and Lindsay drew attention to its apparent 

 absence in 1896-98. 



Fiona fuscata (Herm.). The most abundant water-mite in the pond ; 



males, though less numerous than females, were common this 



spring. 

 Hydryphantes ruber (De Geer.). Another Hydrachnid, of which a 



single specimen was captured in May. 



Notaspis lacustris, Mich. An interesting Oribatid mite, of which I 

 have recently secured about a dozen examples from this pond. 



Diplocephalus permixtus (Cb.). One male. Though, of course, not 

 aquatic, this spider and the next are partial to marshes. 



Gongylidium dentatum (Wid.). Taken on two occasions, in March 

 and May. 



The additional Insects identified are : 



COLLEMBOLA. 



Sminthurus aquaticus, Bourl. Abundant on water plants and on 

 the surface of the water during summer and autumn. I expect 

 this is the Podura aquatica of Scott and Lindsay's list. The 

 true Podura aquatica, L., is rare in this district, ana I have 

 looked for it in vain on the upper Elf Loch. 



Isotoma palustris (Mull.). Is also very common on this pond. 



HEMIPTERA. 



Gerris aspera, Fieb. A few examples captured in May and June last. 



G. lacustris, L. Have taken this also. 



Corixa distincta, Fieb. Common. 



C. fallenii, Fieb. One specimen identified. 



C. mcesta, Fieb. A few secured this spring. 



C. semistriata, Fieb. Not scarce. 



C. prtzusta, Fieb. Plentiful during April and May last. 



NEUROPTERA. 



Enallagma cyathigernni, Charp. I have seen this little dragon-fly 

 at the pond, but not recently. 



Rhithrogena setnicolorata, Curt. This May-fly is common this year. 



