JOURNAL OF PROCEEDINGS. IXXXV 



are regarded by Mr. J. V. Thompson to be immature crabs in a 

 state intermediate between Zoete and decapod Br achy ur a. This opi- 

 nion however was regarded by Mr. Westwood as not sufficiently 

 established. 



Mr. Iladdon exhibited specimens of the wood of a fir-tree, from 

 Bevv'dley Forest, Worcestershire, perforated and destroyed by the 

 larvae of Sirex Juvencus. Of this tree twenty feet were so inter- 

 sected by the burrows that it was fit for nothing but fire- wood, and 

 being placed in an outhouse, the insects came out every morning, 

 five, six, or more each day ; the females averaged one in twelve for 

 the first six weeks, but afterwards became more plentiful, and con- 

 tinued to make their appearance until the end of November, females 

 only being produced during the last two or three weeks. 



Mr. Raddon also exhibited several biscuits completely destroyed 

 by a small beetle (Anobium paniceum) , which in the larva state had 

 perforated them in every direction, 



Mr. J. C. Johnstone exhibited leaves of the sugar-cane greatly in- 

 jured, by the cane-tly, the eifects of whose jierforations were visible 

 all over the surface of the leaf. 



The following memoirs were read : 



" Note relative to the Larva of Blaps mortisaga.'" By Robert 

 Patterson, Esq. 



" Account of the capture of a remarkable dark-coloured variety of 

 Vanessa Urticce, having the second and third costal black spots con- 

 fluent, and the posterior wings black, with very slight indications of 

 the blue lunules." By Mr. John Gee of Coventry. 



" Descriptions of two new genera of exotic Hemiptera." By J. O. 

 Westwood. 



" Notice of the varieties of Chiasognathiis Grantii, forwarded to 

 Cambridge by C.Darwin, Esq." By C. C. Babington, Esq., M.A., 

 F.L.S., &c. 



Of the twelve specimens of this insect sent home by Mr. Darwin, 

 several were scarcely more than half the size of the others, but dif- 

 fered in no other respect, the proportion between the mandibles and 

 body being the same in all. The hook at the apex of the mandibles 

 is not much marked in some of the specimens, only appearing as a 

 uniform curve, by which the tip is brought into a vertical position. 

 This does not depend upon size, some of both the large and small 

 specimens having the hook and otiiers wanting it. The scutellum 

 is thickly and minutely punctured. The Tetrophthalmus chiloensis of 

 Lesson is without doubt the same insect as this ; that name must 

 therefore fall. The individuals sent home by Mr. Darwin were taken 

 in the island of Chiloe, on the feouth-west coast of South America. 



