VI JOURNAL OF PROCEEDINGS. 



Mr. Westwood exhibited a twig of lilac infested by the larvae 

 of Grac'dlaria Anastomosis (one of the minute T'meidce), which in 

 the young state mine within the substance of the leaves, but after 

 the first moult they quit the interior of the leaf and become leaf- 

 rollers. The only analogous instance of such variation of habits 

 had been recorded by Mr. Lewis in the first part of the Transac- 

 tions of this Society.* 



The following Memoirs were read : 



" Description of a Case of Monstrosity occurring in Dyticus 

 marginalis, in which a portion of the external sexual marks of 

 distinction are abortive.'' By J. O. Westwood, F.L.S. 



" Notes on the Habits of the Sirejisiptera." By G. H. K. 

 Thwaites, Esq., in a letter addressed to J. O. Westwood. 



" At the beginning of last month (May) I captured a few bees 

 of the species infested, which were (with scarcely an exception) 

 females and contained Stylops, or showed evident signs of a Sty- 

 lops having escaped from them, the latter was generally the case 

 during the third week of the same month ; the males made their 

 appearance in some numbers, but few of these Stylopized, and if 

 they were, the Stylops was in such an early stage of growth that 

 I could not get one from them, although I kept the bees alive for 

 three weeks. At the beginning of June I again observed the fe- 

 males of the same bee, but not one of these infested, so that the 

 Stylopized bees are at least a inonth earlier than the others ; it 

 is therefore quite impossible that the Stylops, which appears to 

 live at the utmost eight hours, can lay its egg in the burrow of a 

 bee which does not make its appearance until nearly a month 

 afterwards. Is it not likely that the bees, in most cases, make 

 their cells in the old burrows ? x'Vnd may not the Stylops lay its 

 eggs in these burrows before the bee takes possession of it ? I 

 can conceive no other possible mode of their introduction. 



" The abdomen of the only Stylops I extracted alive from a 

 bee was distended to a considerable size with a liquid of a muddy 

 colour, which is discharged very soon afterwards : I have not had 

 another opportunity of observing the same thing." 



" Completion of a Monograph on the Genus Popillia." By 

 Edward Newman, Esq., F.L.S. 



The Rev. F. W. Hope stated that the specimen of Curculio 

 Reidii had^_but recently come into his possession, and that it was 



* It is this leaf- rolling larva which is devoured by a species of Ichneumon, as 

 described by the late Mr. E. W. Lewis in the Mag. of Nat. Hist , Vol. 6, p. 414. 



