Pterophylla eoneava, 109. 



Purdue experimental locomotive, 24. 



Pygostotus americanus, 91. 



QUARTZ SUSPENSIONS, 25. 



• quaternion and analytical treatments, 20. 



KAPHIDOPHORA LAPIDICOLA, 142, 1-17. 



maculata, 142. 



stygius, 148. 



subterranea, 153. 

 Redding, T.B., 62, 71. 

 Rhyssalus loxotenia, 89. 

 Rhyssematus, lineaticollis, 89. 

 Rotary blowers, 26. 



SAITISPULEX, 90. 

 Salix cordata, 124. 

 Saltitoria. 92. 

 Scovell, J. T..29, .".0. 55. 

 scudderia, 98. 



angustifolia, 102. 



curvicauda, 99, 100, 102. 



furcata , 101 , 152. 



furculata, 99, 100. 



pistillata, 152. 

 Shannon, W. P., 49. 

 Silvanus surinamensis, 91. 

 Simulium meredionale, 87. 



pecuarium, 87. 

 -ilihonophora avena, 90. 



cucurbitaphidis, 90. 

 Slick, E. E.,94, 117. 

 Snow, Benj. W., 20, 25, 26. 

 Soils, humus in, 166. 

 Solidago rigida. 139. 

 Somers, A.N.. 29,35,51. 

 South American cat fishes. 72. 

 Spring meeting, 13. 

 Stagmomantis Carolina, 86. 

 Stenopelmatina, 96, 140. 

 Stone, W. E. and Clinton Dickson, 169. 

 Stone, W. E. and H. X. McCoy, 165. 

 stone, W. E. and W. H. Test, Extraction of 



xylan from straw, 168. 

 Stoops, H. M., 51, 55. 

 .-tylophyga orientalis, 156. 

 Sulphon-phthaleins, 166. 



TEMNOPTERYX, 155, 160. 



deropeltiformis, 160. 

 Test, F. C, 56. 



Test, W. H., see W. E. Stone. 

 Tests of torsional strength, 20. 



Tetracha virginica, 86. 

 Thiofurfurol, 169. 

 Thomas, M. B., 4S, 49. 

 Thyreonotus, 149. 



dorsalis, 151. 



pachymerus, 150. 

 Toxopteragraminum, 91. 

 Trypetagibba, 89. 

 Tyloderma foreolatum, 91. 

 Two-ocean pass, 29. 



UDEOPSYLLA NIGRA, 15:!. 

 Uline, E. B.,42. 

 Ulrey, A. B., 00. 

 Underwood, L. M., 41, 48, 49. 

 United States fish commission steamer Al- 

 batross. 56. 



VALENCES, determination of, 169. 



Van der Waal's equation, 25. 



Vegetable and mineral matter from a snow 



storm, 29. 

 Vernonia fasciculata, 132. 



WALKER, FRANCIS A., 51. 

 Webster, F. M., 81. 

 Wesmadia rileyi, 91. 

 Wilkin, John, 20. 

 Wright, John S., 41, 50. 



XIPHIDITJM, 113, 119, 121, 123, 130. 



agile, 131, 132. 



attenuatum, 128, 140. 



brevipenne, 121, 123. 



concinnum, 137. 



curtipenne, 122. 



ensiferum, 123. 



fasciatum, 119, 121,123. 



glaberrimum, 133. 



modestum, 126. 



ne morale, 122. 



nigropleurum, 118, 125. 



saltans, 152. 



scudderi, 128. 



spinulosum, 136. 



strictum, 127, 129, 134. 



variations in species of, 119, 

 121, 129. 



vulgare. 131. 

 Xylan, extraction of, from straw, 168. 

 Xylose, multirotation of, 109. 



ZELA nigriceps, 90. 



