xlviii 
hundred species, many additions being enumerated and described 
in " Troisiemes Additions au Synopsis des Gomphines," in the 
Bulletin of the Hoyal Academy of Belgium, June, 1873, and 
"Appendices aux Troisiemes Additions," November, i873, the 
number being swelled by various new species in the Museums of 
London and Oxford, recently visited by the author. 
Dr. Stal, of Stockholm, continues his laborious researches on 
the Orthoptera, by the publication of a ' Recensio Orthopterorum : 
Eevue Critique des Orthopteres decrits par Linne, De Geer et 
Thunberg' (Part 1, 8vo, pp. 154), The first fascicle is devoted 
to the family of the true locusts {Locustidce of English authors, 
Acridiodca of Burmeister), and which are divided into the families 
Proscopidse, Mastacida3, Phymatidte, Pampliagidffi, Acridiidae, 
Truxalidte, ffidipodidie, Pneumorida?, Choroetypidse, Coelopter- 
nidae and Tettigidas. A great number of new genera are esta- 
blished, to which are ascribed not only the species described by 
the three Swedish authors named in the title, but also those of 
more recent writers. The recognition of the former sj)ecies, in 
consequence of the typical individuals being still preserved in the 
Museums of Stockholm and Upsal, is especially valuable to the 
Orthopterist. 
Mr. Wood Mason has published the descriptions of various 
new species of Phasmidte, and has been able to determine the 
sexual identity of various species which had hitherto been 
regarded not only as distinct, but as belonging to different 
genera. 
The Bev. T. A. Marshall has furnished our Society with two 
parts of the Catalogue of Britisli Insects, devoted to the Ichneu- 
mouides adsciti, Chrysidid^e, and Oxyura, showing an amount of 
labour which the loss of his collection by shipwreck has not 
damped. 
The commencement of a memoir on the Mutillidfe of South 
America, by Dr. Gerstaecker, appears in the first part of the 
40tli jahrg. (volume) of 'Wiegmann's Archives,' 1874; about one 
hundred and twenty species are enumerated in this first part of 
the memoir ; and Mr. F. Smith has described a great number of 
exotic fossorial Hymenoptera, during the past year, in the pages 
of the ' Annals of Natural History.' 
The investigation of our British Hemii^tera and Homoptera 
has been continued by Messrs. Douglas and Scott, in the * Ento- 
