47 



when once they were called into action. But whether this were so 

 or not, the case of the young larvae being carried on the wind, as 

 related by Mr. Williams, would offer a probable explanation of the 

 eruption of the species that occurred in the fens in the earlier part 

 of last century, and possibly account for the occasional finding of 

 larva? m other parts of the country, for it having once been 

 demonstrated that the young larvfe can be carried on the wind the 

 distance to which they might be taken was limited only by the 

 force and the duration of the breeze. 



FEBRUARY -lith, 1916. 



This meeting was devoted to the exhibition of lantern-slides. 



Mr. Main exhibited a series of slides illustrating the parasites of 

 the larvae of On/i/ia antigna. 



Mr. Sperring exhibited a considerable number of slides in colour, 

 kindly lent by the Paget Company. 



Mr. Dennis exhibited slides of the leafy willow gall, the flowers 

 of Aspidi'itra, views of Water-end in Weymes Park, where the 

 stream disappears underground in dry summer weather, as does the 

 Mole at Burford Bridge, the flowers of the Milkwort, flowers of the 

 buckthorn, Wiamu'is frangiila, the pappus fruit of the Goatsbeard, 

 and views of Drosserfield Lake in Essex, and of Epping Forest near 

 the " Wake Arms." 



Mr. Colthrup exhibited a number of sets of slides kindly lent by 

 the Nature Photographic Society and also some of his own. These 

 series included sets of slides of the Redshank, Ringed Plover, 

 Common Tern, and Lapwing on and about their nests, concerning 

 which he remarked that when the bird's commence to sit, those 

 that lay four eggs arrange them point inwards, but those that lay 

 only three usually arrange two side by side and the third at right 

 angles across the points of the other two. The remaining slides 

 were a series of the Wheatear feeding its young, various species of 

 butterflies at rest on flowers, a number of larva; feeding or resting, 

 several illustrating the habits of spiders, and a considerable number 

 showing moths at rest on tree-trunks, fences, etc. It was remarked 

 that it was most unusual to lind Aspilatex ochrearia {citraria) resting 

 on a tree-trunk, and in the series of Brt/ophila muralh it was noted 

 that the insect was in varied positions, even head downwards. 



