120 



yellowish anthers. The pistils mature before the anthers, 

 which do not all shed their pollen at once — an arrangement 

 that ensures cross-pollination. There are neither petals nor 

 sepals. The situation of growth makes it difficult to observe 

 the insect agents by which this is effected ; but analogy 

 would lead one to suppose they are flies. It is said that the 

 flowers give off the odour of decaying matter, which also 

 points to flies as the pollinators. 



Mr. Step was not aware of the circumstances under which 

 this continental plant was introduced to Boldremere, but to 

 his knowledge it had flourished there for twenty years ; and 

 its healthy condition suggests that it might be used generally 

 for ornamental waters in this country. 



AUGUST. nth, 1910. 



Mr. Carr exhibited ova of Acidalia straminata, laid on 

 heather from Oxshott. 



Mr. Sich exhibited some catkins of sallow {Salix aurita) 

 which he had met with during the past week at Chiswick. 



Mr. Ray ward exhibited a specimen oi Adopcra flava {linca) 

 which he had met with in a moribund condition from being 

 attacked by no less than twenty-one specimens of a mite. 

 He also exhibited the shells of the ova of Geonietra vcrnaria 

 and Phorodesiiia sviaragdaria, for comparison of the methods 

 of deposition. In the former case the ova were deposited 

 stacked in a pile, while in the latter they were laid either 

 singly or one or two side by side. The larvae of P. suiarag- 

 daria immediately on emergence commence to cover them- 

 selves with debris, and appear to bite and masticate pieces of 

 the food-plant, which they apparently cover with saliva ejected 

 from the mouth, and then attach them to the tubercles. 

 It was found difficult to remove this debris from the tubercles 

 with a brush. 



Mr. West (of Greenwich) exhibited several species of 

 Coleoptera and Hemiptera, which he had met with recently, 

 attacked by a species of mite. He stated that it was by no 

 means an uncommon occurrence. 



Mr. R. Adkin, for Mr. Lachlan Gibb (of Montreal), ex- 

 hibited a number of " white " butterflies from Canada ; they 

 consisted of a series of the Canadian native "white" {Pieris 

 olcracea), a series of the introduced Pieris rapcc, and three 

 specimens taken near Lost River on May 28th last, which 

 Mr. Gibb thought might, perhaps, prove to be a new species. 

 The notes sent with the specimens were as follows : 



