THE “Faune de France” series of monographs is now familiar to most zoologists and the separate parts already issued have been noticed at intervals in our columns. The two most recent fascicules that have come to hand form Nos. 18 and 19 in that series; No. 18, by M. M. Gœtghebuer, is concerned with midges forming the tribe Chironomariae of the family Chironomidæ; and No. 19, by M. L. Borland, deals with the true wasps, together with certain related groups commonly united to form the family Bethylidæ. The method of arrangement adopted in these two parts is similar to their predecessors; namely, a short introduction on structure and biology followed by generic keys: under each genus is a key to the species, while each species is separately described, its general distribution indicated, and any important facts known relative to its biology are recorded. The numerous illustrations and full bibliographic references are also noteworthy. We commend these two monographs to the notice of English entomologists, since the French fauna in cludes most of the British species in the groups concerned.Faune de France. 18: Diptères (Nématocères); Chironomidœ. III. Chironomariæ.Par M. Gätghebuer. Pp. 174. 32 francs. 19: Hyménoptères vespiformes, II. (Eumenide, Vespide, Masaride, Bethylide, Dryinide, Embolemide.) Par L. Berland. Pp. viii+208. (Fédération française des Sociétés de Sciences naturelles: Office central de Faunistique.) (Paris: Paul Lechevalier, 1928.) 36 francs.