47 



edged spots on the fore wings. Some of the undersides 

 shown were striated forms ; some with clustered spots on 

 the disc, others with the median row approximating to the 

 margin ; several were incomplete forms of ab. obsolete: ; in 

 each of three specimens one wing lacked its discoidal spot, 

 and one male exactly resembled the ordinary female on the 

 under side. 



Mr. Fremlin read a paper, entitled " The Effect of Physical 

 and Chemical Agencies on Lepidoptera, being the Results 

 of Experiments made in 1906 and 1907 " (see p. 1). 



In the discussion which ensued the President questioned 

 how much the imagines were affected after they emerged 

 from the pupae, and suggested that if possible the pupae 

 should be taken from the jars saturated with the reagent 

 immediately before the emergence of the imago. Mr. Main 

 wished also to know how long the imagines were in the 

 various fumes ; and said that no doubt the number of 

 cripples was the direct effect of the fumes on the immature 

 imago. He also asked if the sulphur experiment should not 

 have been termed sulphurous acid. Mr. Kaye wished to 

 know the locality whence all the pupae experimented on 

 came. Mr. Adkin noted that the two species of pupae used 

 were such as had no cocoons (naked pupae), and suggested 

 that there should have been a natural flow of air impreg- 

 nated with the fumes passing over the pupae rather than that 

 the jars should be saturated with stagnant fumes of the 

 reagent and closed. Mr. Tutt said that experiments such 

 as these were just what at the present time were required. 

 He pointed out, however, that it was in the early stages of 

 the pupa when it was so impressionable, rather than the 

 later. The results showed that no doubt the reagents were 

 most prejudicial to health. Still there had been no means 

 of checking how far the variation which took place in some 

 of the specimens had been due to the direct action of the 

 reagent on the imagines after emergence. 



FEBRUARY 27th, 1908. 



Mr. Rayward exhibited ova of Miselia oxyacanthec, found 

 deposited on the twigs of hawthorn. They were laid, appa- 

 rently, without care as to protection, some being difficult to 

 see on account of being among irregular excrescent growth, 

 others being laid on the bare stem. The general colour was 

 dark, comparable to the colour of the bark. Except in one 



