INDEX 



(Principal references are printed in boldface) 



Achorutes, 3-5, 37, 109, 13 7. 

 longispinus, 50. 

 socialis, 3-5. 

 Achorutidae, 4. 

 Achorutinae, 5. 

 Actaletes, 6. 

 j^dicranus, 12. 



corticiniis, 12. 

 aequalis, Isotoma, 72, 74. 

 affinis, Isotoma, 100. 

 Agrenia, 5, 9, 68. 



bidenticulata, 69, 133. 

 alba, Isotoma, 28. 



albella, Isotoma, 4, 88, 95, 97, IIG, 13J 

 albella leonina, Isotoma, 97. 

 anglicana, Isotoma, 110. 

 angularis, Proisotoma, Gl. 

 annulata, Desoria, 110. 

 Isotoma, 110. 

 Podiira, 110. 

 anomala, Isotomina thermophiia, 63. 

 anophthalma, Folsomia, 26. 

 antiqua, Guthriella, 4, 5, 34, 36, 131. 

 Anurophorus, 6-8, 10, 12. 

 laricis, 12, 129. 

 laricis cuspidata, 13. 

 laricis pallida, 13. 

 aquae, Isotoma, 59. 



Proisotoma, 45, 59, 135. 

 aquatica, Podura, 47. 

 aquatilis, Isotoma, 72. 



Isotoma viridis, 113. 

 arborea, Isotoma, 4, SI, 83, 137. 

 Podura, S3. 

 Vertagopus, 84. 

 arborea nigra, Isotoma, 86, 88, 137. 

 Archisotoma, 5, 9, 66. 



besselsi, 66, 132, 133. 

 arctica, Isotoma, 66. 



Isotoma viridis, 114. 

 aspera, Isotoma, 118, 140. 

 Astephanus, 6. 

 Axelsonia, 6. 



Ballistura, subg., 3, 5, 38, 39. 

 balteata, Isotoma, 76. 



Isotoma palustris, 76. 

 balteatus, Isotomurus palustris, 76. 

 belfragei, Isotoma, 110, ill, 113. 

 besselsi, Archisotoma, 66, 132, 133. 



Proisotoma, 66. 

 besselsi (i), Isotoma, 66. 

 bidenticula, Isotoma, 21-23, 118, 119. 

 bidenticulata, Agrenia, 69- 133. 



Isotoma, 68, 69. 

 binoculata, Isotoma, 27. 

 Bornerella, 6. 

 Bourletia, 12. 



laricis, 12. 

 brevipenna, Isotoma, 56. 



Proisotoma, 44, 56, 134. 

 brunnea, Isotoma, 86. 



95462—37 10 



bulbosa, Proisotoma, 7, 43, 44, 58, 135. 

 caerulea, Isotoma, 110. 

 caeruleatra, Isotoma, 104. 



Isotoma violacea, 88, 104, 139. 

 caldaria, Folsomia fimetaria, 31, 131. 



Isotoma fimetaria, 31. 

 Candida, Folsomia, 28. 

 capitola, Isotoma, 110, 111. 

 catena, Isotoma, 112. 



Isotoma viridis, 87, 112. 

 chlorata, Heterotoma, 110. 

 cincta, Isotoma palustris, 76, 113. 



Isotoma viridis, 113. 

 cinerea, Desoria, 81. 



Isotoma, 81, 85, 98, 137. 

 Vertagopus, 81. 

 Clavaria, 100. 

 clavipila, Isotoma, 51. 

 coerulea, Tetracanthella, 10. 

 cognata, Proisotoma, 45, 65, 136. 

 Coloburella, 0. 

 communa, Isotoma, 48. 



Proisotoma, 3, 43, 48, 133. 

 constricta, Proisotoma, 45, 64, 136. 

 corticina, Lipura, 12. 

 corticinus, Adieranus, 12. 

 Cryptopygus, 6, 17. 

 cuspidata, Anurophorus laricis, 13. 

 cylindrica, Desoria, 110. 



Isotoma, 110. 

 decemoculata, Proisotoma, 45, 60, 135. 

 delta, Isotoma viridis, 114, 140. 

 dentata, Folsomia fimetaria, 32. 

 denticulata, Isotoma, 83. 

 desmarestii, Isotoma, 110. 

 Desoria, 78, 81. 

 annulata, 110. 

 cinerea, 81. 

 cylindrica, 110. 

 ebroisa, 110. 

 pallida, 110. 

 riparia, 113. 

 viatica, 110. 

 virescens, 110. 

 determinata, Isotoma, 79, 80. 

 Deuterolubbockia, 10. 

 difficilis, Isotoma, 87, 89, 137. 

 dilatata, Isotoma, 81. 

 diplophthalma, Folsomia, 20, 27, 130. 



Isotoma, 27. 

 divergens, Isotoma violacea, 104. 

 dubia, Isotoma, 79. 

 ebriosa, Desoria, 110. 



Isotoma, 110. 

 elongata, Folsomia, 19, 21, 23, 119, 130. 



Isotoma, 21. 

 Entomobryidae, 4. 



eunotabilis, Isotoma, 87, 92, 137, 138. 

 ewingi, Proisotoma, 39, 40, 132. 

 excavata, Proisotoma, 39, 41, 132. 

 fimentaria, Folsomia, 29. 

 Isotoma, 28. 



141 



