— 230— 



s))t-ciiuen of Lasloiienua sfrrlcurne lias been fouud alive in Pyretbrum powder 

 wbich Wiis still strong enough to kill cockroaches. 



Mr. Lugger exhibited a pattern of a new aquarium which is very con- 

 venient for rearing and observing all sorts of aquatic larvae &c. It can be hung 

 on the wall like a picture, and readily connected with the vrater pipe, so that a 

 steady How of water of any desired strength can be maintained. 



Mr. Smith read a translation and abstract of a recent paper on the odor 

 giving structures of the males of Lepidoptera, commenting favorably on the 

 same, and citing instances confirmatory of the views advanced, i.e. that they 

 were secondary sexual characters, the odor i^roving agreeable to the 9- Mr. 

 Schwarz said that among the many forms of secondary sexual characters in the 

 Coleoptera, some would likely found analogous in function to those in the Lepid- 

 optera. He referred more particularly to the tufts of hair on the mentum 'of 

 Troijosiia. and those on the ventral segments of the (J' in Dermestes. Difierences 

 in the vestiture of the sexes are known to occur: e.g. Hoplia where the cT lia'^ 

 scales, and the 9 o^^ly liairs; but in this case it is hardly possible that we have 

 to do with odoriferous organs. 



