212 THE CANADIAN ENTOMOLOGIST. 



it especially valuable for local use. The book is the result of two years 

 of assiduous labour, as Dr. Peryassii tells us, at the Institute de 

 Manguinhos in Rio de Janeiro, Brazil, under the direction of Dr. Oswaldo 

 Cruz and Dr. Arthur Neiva. It is a creditable production. Dr. Peryassii 

 records about 130 species of mosquitoes from Brazil (in one place he gives 

 131 species, in another 127), but there must be many more to be found 

 in this large region. Mr. Busck found 90 species in the Panama Canal 

 Zone during a short stay of but three months. The author's observations 

 on larvae are especially interesting, though we wish more details had been 

 given of the Culicine forms. The Anophelines are most favoured, no 

 doubt from their pathological connections, and receive more detailed study. 

 The eggs of Chagasia farjardoi, an Anopheline, are most curious objects, 

 resembling floating dipterous pupae, one end modified like a respiratory 

 organ. 



Our author has adopted the classification of Lutz, as modified by 

 Theobald. Our objections to this classification need not be here repeated, 

 as they have been set forth elsewhere, and the classification has many 

 points of excellence, although it needs simplification. That Dr. Lutz's 

 classification should be used in a publication emanating from Brazil i?, 

 of course, entirely fitting. Some of the records of species, more especially 

 those cited from other authors, will require critical revision. We notice, 

 for example, Dejidromyia Smithii, Coquillett, credited to Rio de Janeiro 

 on the authority of Farjado, which is to say the least a doubtful record. 



Our author has entirely omitted all references to the places of publi- 

 cation of species and genera. We had hoped to learn the exact dates and 

 references to Dr. Lutz's and Dr. Cruz's species, published in Brazilian 

 medical journals not available in Washington, but were disappointed. 



A number of new species are described, mostly credited to other 

 authors. Dr. Peryassu having reserved for himself but one species so far 

 as we notice. Unfortunately Dr. Peryassu's generous intentions will fail, 

 for there is no evidence that any of the descriptions were written by 

 another than the author himself, and, as we understand the rules, new 

 names are to be credited to the one first publishing them, not to one who 

 had suggested the name or labelled a specimen therewith. Therefore all 

 the new species in the book must be attributed to Dr. Peryassu. 



HARRISON G. DYAR. 



Mailed June 5th, 1908, 



