INDEX TO VOL XXVFII. (* indicates new genera, species or varieties.) AINSLIE, C. N. Notes on the construction of the cocoon of Praon 364 I'.AKER, A. C. On the Chinese gall ( ill.) 385 BANKS, N. New mites, mostly economic ( ill.) 193 BERNIIEIM, J. L. Swarms of butterflies (ill.) 339 BLACKMORE, E. H. Entomology in British Columbia. . . . .i/><; BLAISDELL, F. E. A correction in Omits 234 Studies in the tenebrionid tribe Eleodiini, No. 2 221 l)i,AiSDEi,L and REYNOLDS. A new Omits (ill.) 49 BRUES, C. T. Three new West Indian species of the ich-neumonid genus Eiphosoma (ill.) 450 BUCHHOLZ, O. A new species of Acronycta 183 CALVERT, P. P. Advances in knowledge of fossil insects. 80 Ants vs. men 185 Calopteryx dimidiata apicalis 266 The convocation week meetings 77, 468 The lack of entomologists (editorial) 373 The national defense against and by insects 283 The News for 1917 (editorial) 39 The News for 1918 (editorial) 424 Review : Tillyard's Biology of dragonflies 475 Specialization in entomology 140 Studies on Costa Rican Odonata. \ 111. A new genus allied to Cora (ill.) 259 CHAMBERLIN, W. J. A correction in Trach\kcle 234 Notes on some Buprestidae of northern California. u<;, 166 CHIDESTER, F. E. Dytiscus as a destroyer of mosquito larvae 454 COCKERELL, T. D. A. Entomology at the United Slates National Museum cq New bees from Costa Rica 200 A second Collctcs with spotted wings 36^5 Some bees of the genus Psacnythla 302 481