ZOOLOGY AND BOTANY, .MICROSCOPY, ETC. 591 



turns its head from the light. He also finds that " mechanical stimu- 

 lation has a kinetic effect, since it induces locomotion." 



Injurious Insects in Ireland.* — G. H. Carpenter discusses injurious 

 insects and other animals observed in Ireland during the year 1903, 

 e.g. spotted crane-fly, springtails, flea-beetle, carrot-fly, root-mites, and 

 black-currant mite. 



Life-History of Case Bearers.f— Ella M. Briggs describes the life- 

 history of Chlamys plicata, one of the Chrysomelid beetles. She pays 

 particular attention to the way in which the larvae build and enlarge 

 their escrementitious cases. The beetles live on the high-vine black- 

 berry, both adults and larval cases resemble pieces of dung, and the 

 cases have also a striking resemblance to the dormant buds of the alder 

 and to the black fruit of the blackberry. The beetle " feigns dead " 

 when disturbed, and its dull colour and rough appearance make it 

 almost undiscernible to the human eye. 



New Genus of Diptera from Falkland Islands.:}:— Giinther Ender- 

 lein describes a new Limnobiid — Zalusa falMandica g. et sp. n. — which 

 differs from all known genera in having only two branches in the 

 median nervures, and in the marked reduction of the wings, which are 

 about the length of the thorax. 



Histolysis of Muscles on Larval Muscida3.§— Ch. Perez confirms 

 Kowalevsky's description of the phagocytic absorption of the larval 

 muscles in Muscidas. The disruption is complete, affecting both myo- 

 plasm and nuclei, and it is wholly due to leucocytic phagocytes. 



In the subsequent histogenesis, which is also discussed||, there is an 

 interesting process of nuclear proliferation, which the author calls 

 multiple direct division. 



Catalogue of North American Diptera.f — J. M. Aldrich has pro- 

 duced a huge catalogue of North American Diptera, based upon Osten 

 Sacken's Catalogue (second edition) published in 1878. Since that date 

 the number of species has doubled ; the number of references to pre- 

 viously known species has almost doubled ; several families have been 

 monographed or revised, with more or less change of nomenclature ; 

 along with this has gone the publication of a multitude of smaller 

 papers, touching every family but one, and the larger part of the genera. 

 Thus great changes appear in the new catalogue. 



Specific Peculiarities of External Genital Organs in Sarcopsylla.** 

 — F. Du Eoselle describes the penis and annexed structures in S. carnaria, 

 and shows that in numerous species of this compact genus, the pecu- 

 liarities of the parts are most reliable specific characters. 



New Flea from Armadillo.ft — Giinther Enderlein gives another 

 illustration of the specialised character of parasites. Tolypeutes comirus, 



* Economic Proc. R. Dublin Soc, i. (1904) pp. 249-66 (2 pis.). 



+ Cold Spring Harbor Monographs, iv. (1905) pp. 1-12 (1 pi. and 11 figs ) 



t Zool. Anzeig., xxix. (1905) pp. 69-72 (2 rigs.). 



§ P. V. Soc. Sci. Bordeaux, 1904, pp. 68-70. || Tom. cit., pp. 75-6. 



^ Smithsonian Misc. Collections, xlri, (1905) pp. 1-680. 

 ** Mem. Soc. Linn, du Nord, xi. (1904) pp. 5-10 (2 pis.). 

 ft Zool. Anzeig., xxix. (1905) pp. 139-42 (6 figs.). 



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