FIELD MEETINGS FOR 1911 345 



This small piece of specialisation, then, accounts for a great 

 many of the additions to the British fauna ; but even in the 

 larger forms, the Centipedes and Millipedes proper, many- 

 important captures, due very largely to almost phenomenal 

 good luck, have been made. Sixteen different Chilopods or 

 Centipedes are recorded, including one addition to the British 

 fauna, Lithobius nigrifrons, Latz., whilst of the Diplopods 

 or Millipedes no less than 24 are noted. Of these Prof. 

 Verhoeff has found it necessary to diagnose a new family, 

 Brachychaeteumidae for the reception of Brachychceteuma 

 bagnatti, Verhoeff, from Gibside ■ and Titansoma jiirassicum, 

 Verhoeff, Polydesmus coriaceus, Porat, Microchordeuina sp., 

 Isobates varicornis, C. L. Koch, Napojulus sp., Glomeris 

 perplexa, Latz., are also recorded for the first time as British. 

 T. jurassiatm, Verhoeff, was previously known from a single 

 specimen taken on the Danube in 19 10. With us it has 

 occurred' in numbers in a dene near Fencehouses, whilst I 

 have taken a few examples in my garden and on the Wear 

 banks near Penshaw, at Gibside, and in Prof. Poulton's garden 

 at Oxford. 



Throughout this report the Myriapods are listed in full. 



Had I possessed a wider knowledge of the better-known 

 natural objects I should have attempted to review the progress 

 of our knowledge of the local fauna during the year. I must, 

 however, restrict this brief review to those obscure groups to 

 which I more or less confine myself, and which I feel sure 

 would be more closely studied if naturalists would only realize 

 the intense interest attached to some of them. 



Perhaps the most interesting piece of work attempted 

 during the year lies in the study of the Arthropod Ectoparasites 

 of the mammals and birds of Northumberland and Durham, 

 commenced in the early spring by Mr. Wm. Hall, of Fatfield, 

 and myself, and in which we have been helped by Messrs. 

 E. L. Gill, Charlton brothers, Walton Lee, etc. Up to the 

 moment we have recognized 28 different fleas (Siphonaptera) 



