(2418) DE CASTRO TEIXEIRA, R M., 1971. Contribuiçâo para o conhecimento da fauna odonatolôgica de Rio Grande do Sul. [Contribution to the knowledge of the odonate fauna of the Rio Grande do Sul], Arqs Mus. nac. 54: 17-24. (Portuguese). — (Pontificia Univ. Carolina, Porto Alegre, RS. Brazil). An annotated list is given of 16 zygopteran and 24 anisopteran spp. from the Rio Grande do Sul, Brazil. Some of the taxa listed are identified to the genus only. (2419) LAI, Y.L., 1971. An introduction to the Odonata of Hong Kong. New Asia College Academic Annual 13 (Sept. 1971): 1-48. (Chinese, with Engl. s.). — (Biol. Dept.. Univ. Sei. Centre, Chinese Univ. Hong Kong, Smalin. Hong Kong). The history of odonatology of the crown colony of Hong Kong is traced from 1854 to present. The fullest and most authoritative account of the fauna is that by S. Asahina (1965, Kontyu 33: 493-506). The present paper is based on the previously published data and on extensive collections made by the Department of Biology, New Asia College, Chinese University of Hong Kong, brought together during several yrs in the New Territories, Kowloon and in the Hong Kong Island. In all, 56 spp. are described, among which 22 are new to the Colony. Special attention is being paid to their habits, reproductive behaviour and life histories. A complete list of the 77 spp. hitherto recorded from Hong Kong is also provided. It is mainly based on Dr. Asahina’s 1965 account. — (Abstracter's note: As is apparent from the photographs accompanying the paper, some spp. have been erroneously identified: Fig. 13: Anax parthenope Julius, not ”A. guttatus”; — Fig. 16: probably a teneral Gynacanthajaponica, stated only as "Gynacantha sp.”; — Fig. 17: probably Aeschnophlebia anisoptera, not "Planaeschna sp.”; — Fig. 18: Ictinogomphus pertinax, not ”1. rapax”; — Fig. 19: Leptogomphus perforatus, not ”L. sauteri”; — Fig. 20: Tholymis tillarga, not "Epitheca sp."; — Fig, 21; Zyxomma petiolatum, not "Somatochlora dido”; — Fig. 28: Rhyothemis variegata, not "Hydrobasileus croceus”; — Fig. 35: Orthetrum pruinosum neglectum, not ”0. testaceum”; — Fig. 41: probably subadult of Trithemis aurora, not "Sympetrum imitans”; — Fig. 42: probably Brachythemis contaminata, not "Sympetrum striolatum”; — Fig. 56: Mnais mneme, not ”M. earnshawi”; — Fig. 66: Prodasineura autumnalis, not ’Tndoneura delorosa”; — Fig. 71: Agriocnemis femina oryzae, not "A. lacteola”; — and Fig. 76: Ceriagrion latericum ryukyuanum, and not ”C. coromandelianum" as stated in the captions. It is certainly unfortunate that the synonyms and/or identifications have not been checked by an experienced taxonomist prior to publication, though the biological notes are certainly among the very few so far published in Chinese, hence they might inspire other Chinese workers to undertake more systematic work in the field of ecology, bionomy and behaviour of the Chinese spp.).