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specimen of Lasiodenna serricorne has been found alive in Pyrethrum powder 



« hicli was 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 water pipe, so that a 

 steady flow 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 thev 

 were secondary sexual characters, the odor proving agreeable to the 9 • Mr. 

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

 t 'oleoptera, 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 

 Trogosita, and those on the ventral segments of the (J 1 in Dermestes. Differences 

 in the vestiture of the sexes are known to occur: e.g. Hoplia. where the $ has 

 scales, and the 9 only hairs; but in this case it is hardly possible that we have 

 to do with odoriferous organs. 



