artificially rubbing the parts together in a dead alcoholic specimen he could 

 produce a sound almost as loud as, and very closely similar to, that made 

 by briskly and continuously drawing the tip of the index-finger backwards 

 and forwards, in a direction transverse to its coarse ridges, over the ends of 

 the teeth of a very line-toothed comb. The apparatus, which, as in the 

 Mijrjale, is developed on each side of the body, was situated — the scraper 

 upon the flat outer face of the basal joint of the palp-fingers ; the rasj) on 

 the equally flat and produced inner face of the corresponding joint of the 

 first pair of legs. On separating these appendages from one another, 

 a slightly raised and well-defined large oval area of lighter coloration than 

 the surrounding chitine was to be seen at the very base of the basal joint 

 of each ; these areae constituted respectively the scraper and the rasp ; the 

 former was tolerably thickly but regularly beset with stout, conical, sharp 

 spinules curved like a tiger's canine, only more towards the points, some of 

 which terminate in a long limp hair ; the latter crowdedly studded with 

 minute tubercles shaped like the tops of mushrooms. He had met with no 

 stridulating organs in this position in any scorpions besides 8. Afer and its 

 allies ; but in searching for them in other groups he had come to the 

 conclusion that the very peculiar armature of the trenchant edges of the 

 palp-fingers in all the Androcto)toid(B, and in some at any rate of the 

 PandinoidcB (no Telegonoidm nor Vejovoidm had yet been examined), was 

 nothing but a modification for the same purpose, for the movable finger of 

 this pair of appendages when in the closest relation of apposition to its 

 immovable fellow could most easily be made to grate upon it from side to 

 side so as to produce a most distinct crepitating sound ; but when separated 

 from it ever so little appeared to be incapable of the slightest lateral 

 movement. It was his intention on his return to India to endeavour 

 to determine this question, as well as many others relative to the 

 species in which the presence of sound-producing apparatus had now 

 been demonstrated by careful observation and experiment upon living 

 animals. 



Mr. Mason finally handed to Prof. Westwood for identification the larva 

 of some homopterous insect with what appeared to be a lepidopterous case- 

 bearing larva attached to its last segment by a tough semi-transparent cord. 

 The specimens were from Bangalore. 



Mr. Wormald exhibited, on behalf of Mr. Pryer, a small collection of 

 Chinese Lepidoptera. 



Mr. G. C. Champion exhibited some rare beetles from Avieraore, 

 Inverness-shire ; among them was Pachijta sex-maculata, a Longicoru new 

 to Britain. 



Mr. J. Jenner Weir mentioned a case of parthenogenesis in Lasiocamjia 

 quercus, which had recently come under his notice. 



The President read the following letter from Herr A. W. B. Grevelink, 



