Tngall, O. D.. 26. 

 Tuniperus communis, 120. 

 " virginiana, 120. 

 Lacrophilus, 127. 

 Lampsilis luteola, 112, 114. 

 occidens, 114. 

 '■ rectus, 114. 



" ventricosa. 111. 114. 



Land, W. T. G.. 28, 107. 

 Lasius americanus, 137. 139. 

 " claviger, 140. 

 " interjectus. 140. 



latipes, 140. 

 " minutus. 140. 

 " mixtus. 140. 

 " nearcticus, 141. 

 " niger, 140. 

 " subglaber, 141. 

 " umbratus, 140. 

 Lepidostrobus, 2S, 107. 

 Lepidodendron, 107. 

 Leptaena rhomboidalis, 97-101. 

 Leptobolus illinoisensis, 98. 

 Leptothorax curvispinosus, 139. 



" melanoticus. 139. 



Lestes rectansrularis, 127. 



" vigilax. 127. 

 Libellula pulchella, 127. 

 Lingula, 103-106. 

 Loxonema, 100. 

 Lymnaea appressa. 110 112. 



reflexa. 127, 129, 131. 

 Mancasellus danielsi, 127. 129. 

 Members, new, 14. 

 Membership list. 161. 

 Metallic Colors of Birds and In- 

 sects, 20. 

 Metapolichas clintonensis. 99. 



" ferrissi. 97-99. 



Mevers, Ira. 18. 

 Mic'helson, A. A., 20. 

 Microdrilae, 128. 

 Minutes of 4th Annual Meeting. 



11. 

 Modiolopsis. 100. 

 Mollusca of Piatt, Champaign and 



Vermilion Counties. 20. 142. 

 Monomorium minimum, 138. 



" pharaonis. 138. 



Musculium securis, 128. 



" truncatum. 128. 129. 



Mj-rmecina, 138. 

 Myrmica canadensis. 139. 

 sabuleti, 139. 

 " scabrinodis. 139. 



" schencki, 139. 



Necrologj', 156 

 Nomination Committee. 27. 

 Notonecta undulata. 127. 

 Noyes, W. A., 21, 27, 33. 

 Obliquaria reflexa. 111. 114. 



Occurrence of Rare Alga. Gloeo- 



taenium, 21, 143. 

 Oil Investigations in Illinois, 21, 



85. 

 Oligochaetae. 128. 

 Ostracoda, 128. 

 Ostrya virginiana. 122. 

 Paramoecium, 128. 

 Paravitrea significans, 142. 

 Pentamerella manniensis. 100, 101. 



102. 

 Pepoon. H. S., 14. 

 Pheidole bicarinata, 141. 

 pilifera. 138. 

 " vinelandica, 138. 



Phenolepis imparis. 139. 

 " testacea. 139. 



Phenopelis parvula, 141. 

 Pholidops channahonensis, 98. 

 Physa ancillaria warreniana, 110, 



112. 

 Physa gyrina. 112, 128. 129. 



" integra. 112. 

 Physical Properties of Radium, 



21. 41. 

 Picea canadensis, 110. 113, 116. 



" evanstoni. 110. 113. 116. 

 Pilaeus militaris, 128. 

 Pinus banksiana, 120. 

 Pisidium, 110, 111, 112. 

 Plagiola elegans, 111, 114. 

 Planorbis bicarinatus, 110, 112. 

 " campanulatus. 110, 112. 



deflectus. 110. 127. 129. 

 " exacutus, 127, 129. 



trivolvis. 110, HI, 112, 

 127, 129. 

 Platyostoma, 100. 

 Pleo striola, 127. 

 Pleurobema clavus. 114. 

 Pleurotomaria, 100. 

 Polyergus bicolor, 141. 



'■ breviceps, 141. 



lucidus. 141. 

 " rufescens, 141. 



Ponera coarctata, 137. 

 Populus deltoides. 120. 

 Post-glacial Life of Willmette 

 Bav, Glacial Lake, Chicago. 20, 

 108. 

 Potamogeton, 116. 

 Preliminary List of the Ants of 



Illinois. 20. 137. 

 Presidential address, 21. 28. 

 Present condition of the State 

 Museum of Natural History, 21. 

 151. 

 Pricer, T. L., 22. 



Problems of Plant-breeding. 28. 

 Proetus channahonensis. 98. 99. 

 Prunus serotina. 122. 

 " virginiana, 122. 



