238 APPENDIX. No. VI; 



COLLEMBOLA. 



Isotoma Bessellsii, Packard ? 

 Podura hyperborea, Boheman ? 

 Lipura sp. ? 



Of the Collembola two are familiar-looking species, often 

 found on the surface of the snow (as in the Alps, &c), and, 

 from their habits of springing in short leaps, known as snow- 

 fleas. 



ABACHNIDA. 



Aran e ide a. 



Tegenaria detestabilis, Cambridge, n. sp. 

 Erigone psyo'ophila, Thorell. 



„ provocans, Cambridge, n. sp. 



„ vexatrix, Cambridge, n. sp. 

 Lycosa glaoialis, Thorell. 

 Tarantula exasperans, Cambridge, n. sp. 



There appeared to be several new forms among the spiders, 

 whereas others were already known. 



Acaeidea. 



Bdella, two or three species. 



Sch'us, one species. 



Hydrachna, probably two species. 



Eylais, one species. 



Oribata, probably two species. 



Damcmis, one species. 



Dennaleic/iifS, one species. 



The Acari (or mites) present representatives of almost 

 all the families, including the water-mites and the peculiar 

 group parasitic upon birds. 



It must be remembered that only about 80 species of 

 insects have been observed in Greenland, although nearly a 

 100 years ago the fauna of the lower portion of that country 

 was worked out by the Danish missionary Otto Fabricius. 

 Iceland has over 300 species, Spitsbergen comparatively few, 



