NOTICES OF NEW BOOKS. 37 



species." Mr. McLachlan made some remarks on the subject of this 

 paper. 



Dr. T. Algernon Chapman read a paper entitled "On some neglected 

 points in the structure of the pupa of Heterocerous Lepidoptera, and their 

 probable value in classification ; with some associated observations on larval 

 prolegs." Mr. Poulton, Mr. Tutt, Mr. Hampson, and Mr. Gahan took part 

 in the discussion which ensued. 



Mr. J. Cosmo-Melvill communicated a paper entitled " Description of 

 a new species of Butterfly of the genus Calinaga, from Siam." 



Mr. W. L. Distant communicated a paper entitled "Descriptions of 

 new genera and species of Neotropical Rhynchota." — H. Goss and W. W. 

 Fowler, Hon. Secretaries. 



NOTICES OF NEW BOOKS, 



Text-Book of the Embryology oj Man and Mammals. By Dr. 

 Oscar Hartwig, Protessor Extraordinarius of Anatomy 

 and Comparative Anatomy, University of Berlin. Trans- 

 lated from the Third German Edition by Edward L. Mark, 

 Ph.D., Hussey Professor of Anatomy, Harvard University. 

 8vo. London : Swan Sonnenschein & Co. New York : 

 Macmillan and Co. 1892. 



This work of 656 pp. is a translation of a volume which has 

 already proved a boon to entomologists in all parts of the world. 

 The main bulk of it is divided into seventeen chapters, one of 

 which is devoted to a " general discussion of the principles of 

 development." The author's name and brilliant reputation are 

 in themselves a guarantee of success, and his volume is already 

 so well known and generally in demand, that detailed criticism 

 of the original would be here superfluous. Among the more 

 wholesome features of the work are the incorporation of a 

 recurring series of concise summaries, and the adequate " pre- 

 sentation of unsettled questions," the matters falling under this 

 or that head being brought to a focus in such a way that the 

 reader at once realises what is the sum of current knowledge 

 reported, and what the field for future enquiry. 



The illustrations, though accurate, are to a large extent 

 poorly executed ; and many of them appear to have been either 

 printed from worn electros, or to have suffered in the manipu- 



