208 Rev. S. Graham Brado-Biiks on Myriapoda. 



XXIII. — Notes on Myriapoda. — XXVII. Wandcrin<j AHlli- 

 pedes. By the Rev. S. Gkaham Bhade-Birks, M.Sc. 

 (Manchester), Lecturer in Zoology and Geolo<^y, South- 

 Eastern Agricultural College (University of London), Wye, 

 Kent. 



Introductory. 



There are published recbrds of a number of observations 

 upon wandering millipedes. 



In a paper cited by Verhoeflf (1900), J. Paszlavszky (1879) 

 published an account of a migration of Brachyiulus iini- 

 lineatus in the Hungarian Alfold, and made reference to 

 observations by Tomosvary on a case in Transylvania 

 (' Termeszettudonumyi Kozlony,' x. p. 365) and to a remark 

 by Tasclienberg with reference to the a))pearance in mass of 

 " .lulus guttidatns Fabr." Concerning 'I'omosvilry's observa- 

 tions, he says : — " In grosster Anzahl war Jidus terrestris L., 

 J. fasciatus Koch und J. trilmeatus Koch vertrefen; jedoch die 

 beiden letzteren und J. unilhieutus waren viel sparlicher als 

 die erstgenannten. Ausserdem war noch eine bis jetzt nicht 

 bestimmte Julus- oder Allajulus-Avt, daini Lithobius, einige 

 GeojJtilus und Limnoicenia." With regard to the names 

 used in this passage I will do no more than point out that 

 the last is obviously meant for Linotcenia, and say that I 

 have not tried to make out what animals are really intended 

 by the names of millipedes used in it. In her report for 

 1885 Miss Ornierod, (188G) p. 48, recorded " the migration 

 of" Julids "in large numbers from one locality to another." 

 They were " apparently travelling across from a field of Oats 

 towards a piece of pasture land." This event was described 

 on the 31st May as " A few mornings since,'' and was 

 re|)orted from Rise Hall, Fakenham. Two years later 

 Bollman (1888) referred to movements of Fontarin virgini- 

 ensis (Drury) at Donaldson, Arkansas. Pa.-zlavszky's (187*J) 

 account was criticized by Verhoeff (1900) in ])uljlishing an 

 account of a wandering in Alsace of Sc/iizo]>hylhim sabulosum 

 (Linne), the specimens examined being reterable to the var. 

 Li/asciatum in both sexes, and just a small number of males 

 to the var. putictulatuni. In the collection made on this 

 occasion there were two specimens of Cylindroiulus londiu- 

 enbis, var. cceruleocmctus (Wood), but Verhoeff considered 

 those to be accidentally jtresent. Mauck (1901) gave an 

 account of the swarming of Fontaria viryiniensis near the 



