144 



BULLETIN 168, UNITED STATES NATIONAL MUSEUM 



plumbea, Isotoma, 110, 111. 

 Podura, 4, 47, 70. 



annulata, 110. 



aquatica, 47. 



arborea, S3. 



fimetaria, 28. 



palustris, 70, 72. 



viridis, 110. 

 Poduridae, 6. 



pomona, Isotoma vindis, 112, 115, 140. 

 prasina, Isotoma palustris, 75. 



Isotoma stuxbergi, 75. 

 prasinus, Isotomurus palustris, 75. 

 Proctostephanus, 6. 

 productus, Isotomodes, 16, 17. 

 Proisotoma, 3, 5-7, 10, 14, 17, 23, 38, 43. 



aquae, 45, 59, 135. 



angularis, 61. 



besselsi, 66. 



brevipenna, 44, 56, 134. 



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



cognata, 45, 65, 136. 



communa, 3, 43, 48, 133. 



constricta, 45, 64, 136. 



decemoculata, 45, 60, 135. 



ewingi, 39, 40, 132. 



excavata, 39, 41, 132. 



frisoni, 44, 55, 134. 



guthriei, 22. 



immersa, 44, 63, 136. 



laguna, 118, 140. 



laticauda, 39, 42, 132. 



longispina, 44, 50, 134. 



minuta, 23, 44, 51, 134. 



obsoleta, 44, 56, 135. 



rainieri, 3, 5, 43, 45, 133. 



schafferi, 3, 5, 43, 46, 133. 



schotti, 5, 39, 132. 



sepulcralis, 3, 6, 44, 54, 134. 



simplex, 45, 61, 135. 



tenella, 63. 



tenelloides, 45, 62, 135. 



titusi, 3, 4, 7, 44, 49, 133. 



vesiculata, 7, 44, 57, 135. 

 Proisotoma, subg., 38, 43. 

 Pseudanurophorus, 6. 

 Pseudisotoma, subg., 78. 

 Pseudisotoma sensibilis, 79. 

 pulchella, Isotoma, 66. 

 purpurascens, Isotoma, 110, 111. 

 quadri-denticulata, Isotoma, 81. 

 quadrioculata, Folsomia, 20, 24, 28, 130. 



Isotoma, 24, 25. 

 rainieri, Proisotoma, 3, 5, 43, 45, 133. 

 retardatus, Isotomurus, 3, 71, 136. 

 reuteri, Isotoma, 83. 

 riparia, Desoria, 113. 



Isotoma, 113. 



Isotoma palustris, 113. 



Isotoma viridis, 113, 140. 

 schafferi, Isotoma, 46. 



Proisotoma, 3, 5, 43, 46, 133. 

 schotti, Proisotoma, 5, 39, 132. 

 schotti (i), Isotoma, 39. 



sensibilis, Isotoma, 78, 13G. 



Pseudisotoma, 79. 

 sepulcralis, Isotoma, 54. 



Proisotoma, 3, 6, 44, 54, 134. 

 sexoculata, Folsomia, 20, 23, 130. 



Isotoma, 23. 

 silvestrii, Folsomia, 20, 130. 

 simplex, Proisotoma, 45, 61, 135. 

 Sminthuridae, 70. 

 socialis, Achorutes, 3-5. 

 speciosa, Isotoma, 86. 

 Spinisotoma, 6. 

 spitzbergenensis, Isotoma, 66. 

 stachi, Folsomia, 14, 16, 129. 

 Stenus, 76. 



stuxbergi(i), Isotoma, 72. 

 stuxbergi prasina, Isotoma, 75. 

 subaequalis, Isotoma, 87, 107, 139. 

 subviridis, Isotoma, 87, 115, 140. 

 sj'nonymica, Isotoma, 84-86. 

 tenella, Proisotoma, 63. 

 tenelloides, Proisotoma, 45, 62, 135. 

 tenuis, Isotomodes, 17, 129. 

 terminata, Isotoma, 84-86. 

 Tetracanthella, 4, 7, 8, 10. 



coerulea, 10. 



pilosa, 10. 



wahlgreni, 10, 129. 

 texensis, Isotomurus palustris, 76, 136. 

 tliermophila anomala, Isotomina, 63. 

 titusi, Proisotoma, 3, 4, 7, 44, 49, 133. 

 tricolor, Isotoma, 72, 73, 110, 111, 116. 

 tridentata, Isotoma, 117, 140. 

 trifasciata, Isotoma, 74. 

 trispinata, Isotoma, 4, 87, 91, 137. 

 tullbergi, Isotoma, 72. 

 TuUbergia, 6. 

 unica, Isotoma, 81. 

 Uzelia, 6, 7. 



Vertagopus, subg., 78, 81. 

 Vertagopus arborea, 84. 



cinerea, 81. 

 vesticulata, Proisotoma, 7, 44, 57, 135. 

 vetusta, GuthrieUa, 3, 34, 35, 131. 

 viatica, Desoria, 110. 



Isotoma, 110. 

 violacea, Isotoma, SS, 101, 139. 

 violacea caeruleatra, Isotoma, 88, 104, 



139. 

 violacea divergens, Isotoma, 104. 

 violacea mucronata, Isotoma, 103, 139. 

 virescens, Desoria, 110. 



Isotoma, 110. 

 viridis, Isotoma, 74, 78, 87, 109, 116, 

 140. 

 Podura, 110. 

 viridis aquatilis, Isotoma, 113. 

 viridis arctica, Isotoma, 114. 

 viridis catena, Isotoma, 87, 112. 

 viridis cincta, Isotoma, 113. 

 viridis delta, Isotoma, 114, 140. 

 viridis pomona, Isotoma, 112, 115, 140. 

 viridis riparia, Isotoma, 113, 140. 

 walkerii, Isotoma, 97. 

 wahlgreni, Tetracanthella, 10, 129. 



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