XXIV PROCEEDINGS OF THE 



Mr. Ingpen exhibited a locust taken in Hyde Park, and a spe- 

 cimen of Papilio machaon, reared from a dark-striped Chrysalis ; 

 Mr. Marshall observed that the sexes of this butterfly differed in 

 the colour of the chrysalis. 



A note was also read from John Hogg, Esq. F.L.S., relative to 

 the capture of several living locusts at Scarborough, on the 21st 

 August, and the discovery of several others lying dead on the 

 coast, being probably part of a swarm of those insects driven upon 

 our coast from the Continent by the south-east wind which then 

 prevailed ; and Mr. Spence mentioned the occurrence of a great 

 swarm of locusts in Moldavia on the 25th August, brought by the 

 east wind from Bessai'abia. 



M. W. Thomson, jun., exhibited specimens of Porrectaria lari- 

 cella, a species new to Britain, captured in July in the neigh- 

 bourhood of Heme Hill, on fences ; also specimens of Actinopus 

 ced'ijicatorius , recently received alive from Barbary, upon which he 

 had instituted various experiments with reference to the construc- 

 tion of the valves, and the long duration of the insects deprived of 

 food. 



A Letter on the Habits o? Aphides, by F. Walker, Esq. addressed 

 to Mr, Spence, was read ; also 



A Translation from Ratzeburg's Forstinsecten, vol. iii., on the 

 Economy of the Aphides, communicated by Dr. Schaum ; and 



A Note by Mr. Alfred Smee, on a new locality for Lachnus 

 quercus, namely, on the first oak-tree in the lane leading from the 

 Chingford and Waltham road to High Beech, on the right hand 

 side of the way leading to High Beech. 



Col. Hearsey noticed that some Indian species of plants reared 

 by him in frames in England, from Indian seeds, were as much 

 infested with Ajjhides as indigenous plants. 



A Monograph on the British species of the Neuropterous genus 

 Chnjsopa, by Mr. W. F. Evans, was also read, accompanied by 

 two plates, presented by the author. 



Some notes were read by Mr. Westwood on the atmospherical 

 peculiarities observed during the occurrence of the swarms of 

 Coccinellid(B on the 12th and 13th August last, and on a swarm 

 of Harpalidcs, observed on the evening of the 12th, near Dover, 

 whence it appeared that the barometer had undergone a gradual 

 rise from the 6th till the 14th of that month ; and that on the 

 11th and 12th the thermometer suddenly rose nearly 15 degrees, 

 the 12th being very sultry. 



Mr. Westwood also exhibited the larva of Drilus Jlavescens ; 

 the flower of a pelargonium cut by a Megachile ; also three 



