liv 



Death of a Fellow. 



The death was announced of Dr. Leonard Doncaster, a 

 distinguished Fellow of the Society. 



Exhibitions. 



A CASE OP PARTHENOGENESIS IN LaSIOCAMPA QUERCUS, L.— 



Lord KoTHSCHiLD exhibited 43 specimens of Lasiocampa 

 querents, of which he gave the following account :— 



In 1919 Dr. K. Jordan collected at Hartland Quay, Devon- 

 shire, two or three larvae, from one of which the $ was' hatched 

 which was exhibited to-night with 42 of her offspring. This 

 $ laid 193 eggs, from which some 150 larvae hatched, although 

 no S(S liad been near the ? and no copulation could have 

 taken place, as the cocoon was a solitary one in the breeding- 

 cage. Of these 150 larvae some 75 were sleeved out of doors 

 at Ashton Wold, and the rest were placed, with ivy as food, 

 in a hothouse at Tring. All the sleeved larvae died; but 

 from the hothouse-reared batch 56 cocoons were obtained, 

 from which 43 specimens had so far emerged. Of these, one 

 of two ??, which emerged on 23rd of April, 1920, laid a number 

 of eggs, which unfortunately were not counted; but from 

 these there are now feeding 32 larvae, again on ivy in the hot- 

 house. This $ was also unfertilised, so that we have here an 

 extreme case of parthenogenesis persisting through two 

 generations. 



The parent $ and the offspring were exhibited on behalf of 

 his niece, Miss Miriam Eothschild. 



Mr. P. A. Buxton inquired what was the proportion of the 

 sexes in the original brood, and Lord Eothschild replied that 

 out of 43 specimens 14 were females. The President, Dr. 

 Gahan and Mr. C. B. Williams gave instances of cases of 

 parthenogenesis in Bombycid and Arctiid moths, but no 

 instance was known of its persistence in a second generation. 



Interesting Insects from New Zealand & Australia.— 

 Dr. R. J. TiLLYARD exhibited two dead larvae of Sabatinca 

 barbarica from New Zealand, one about half grown, the other 

 full fed. The latter was brought alive from New Zealand in a 



