1894. 1 23 



Wollastoii in the island of Madeira ; and several specimens of another 

 species, related either to P. notalilis or F.fusca, from Grerinan East 

 Africa. 



Turning to continental Europe, the information obtainable from 

 foreign authors concerning the range of British species of Psychodidoe 

 is very limited. Latreille and Macquart refer to six of the species as 

 indigenous to the north of Erance : Pericoma ca?iescens (Meigen ?), 

 trifasciata, ocellaris, fusca ; Psychoda plialcsnoides and sexpunctafa. 

 Yan der Wulp (who has seen English specimens of nine of them) 

 records eleven of the species from the Netherlands, which are also 

 included by Schiner in the Austrian fauna : JJlomyia fuliginosa ; Peri- 

 coma palustris, nubila, canescens, ocellaris, fusca ; Psyclioda alhipennis, 

 pJialcenoides, sexpunctata, humeralis ; and Trichomyia urhica. Zetter- 

 stedt reckons nine of these last mentioned species amongst the 

 Scandinavian Diptera (omitting JJ. fuliginosa, and the P. canescens of 

 Schiner), and includes a tenth species — P. trifasciata. This apparently 

 exhausts the modern record. 



Six British species extend to Algeria : Pericoma ambigua, ustulata ; 

 Psychoda erminea, sexpunctafa, humeralis ; and Sycorax silacea. 



The local distribution of Psychodidce within the British Islands 

 has been so little investigated that it is as well not to enter here into 

 details on this subject. It will be of more practical advantage to 

 close this article with some topographical notes indicative of the 

 nature of sites affected by certain species. The character of suitable 

 " stations " can usually be recognised at a glance by their vegetation 

 and surroundings. 



The ancient forest of Selwood formerly extended along a range 

 of hills, exterior to the chalk, on the border of Wilts and Somerset, in 

 the neighbourhood of Withara and Bruton. Several streamlets, 

 tributary to the Brue and Stour, there take their rise in swampy dells, 

 shaded by alders and carpeted with such plants as Viola palustris, 

 Chrysosplenium, and Hydrocotyle, decked here and there with Caltha 

 and ferns, such as lady-fern and Lastrea dilatata. These are haunts of 

 Pericoma cognata and Psychoda lucifuga, in May and September, and 

 of P. mutua, in June and July. 



Between Bruton and Wincanton the small hamlet of Stoney 

 Stoke nestles in a hollow close to Eedlynch Park. A short lane, 

 shaded by trees and hedges, leads to the hamlet from a gate at the 

 nearest corner of the park wall. Pericoma revisenda hitherto has 

 been found only in this lane. Jt shelters under hazel and maple 

 leaves, chiefly in the right-hand hedge going down the hill, at the 



