Ixvi 



1872, an abstract of which, communicated by the author, appears 

 in the ' Annals of Natural History' for Jul}^ 1872. 



We are also indebted to M. Marey for a remarkable memoir 

 upon the flight of insects and birds treated mechanically, pub- 

 lished in the ' Annales des Sciences Naturelles,' vol. xv. 



A remarkable memoir, by M. Jobert, on the anatomical struc- 

 ture of the organs of touch throughout the animal kingdom, has 

 appeared in the ' Annales des Sciences Naturelles,' tom. xvi., in 

 which various species of Diptera, Orthoptera and Hymenoptera 

 have been investigated with wonderful delicacy. 



The minute anatomy of the respiratory organs of the Araneee 

 have been investigated by Dr. P. Bertkau, of Cologne, in the 

 ' Archiv. f. Naturgesch,' vol. xxxviii. pt. 2. From the structure 

 of the trachea and spiracles the author establishes five principal 

 divisions in the class of spiders. 



An interesting paper on the digestive organization of the mole 

 cricket, by Josef Kolazj^ appears in the Zool. & Bot. Ver., Vienna, 

 1871. 



A memoir containing descriptions and figures of the minute 

 structure of the stridulating organs of the Acridiidpe, by Dr. 

 Graber, of the University of Graz, appears in the Zool. & Bot. Ver., 

 Vienna, 1871. 



The structure of the apparatus by which the chirping of the 

 grasshoppers with long antennse is effected, forms the subject of 

 an elaborate illustrated memoir by the last-named author, with 

 the title ' Ueber den Tonapparat der Locustiden, ein Beitrag zum 

 Darwinismus' (Siebold & Kolliker,Zeitschr. f. Wissensch.Zoologie, 

 vol. xxii. p. 100, and pi. ix.). The same subject had also been 

 carefully described by Landois in the seventeenth volume of the 

 same Zeitschrift, especially as observed in Locusta viridissima and 

 Decticus verrucivorus. 



Dr. H. Landois has also published a series of observations and 

 figures of the musical apparatus of the Cicadae, regarded as the 

 analogues of those of the crickets, especially Gryllotalpa vulgaris, 

 in the Zeitschr. f. Wissensch. Zool., 1872, p. 849, pi. 28. 



The production of sound by the Death's Head Moth has often 

 attracted attention, and a number of theories have been proposed 

 for its explanation. We are indebted to Mr. H. N. Moseley for a 

 careful examination of the subject and a discussion of the various 

 theories, in a paper published in 'Nature' for June 20, 1872, in 



