Séance du k Décembre 191^. 143 



II. — A Note on the scarcity of Chalcis brouicomis 

 Klug, during recent years. 



The handsome black and yellow Chalcid known 

 under the name of Chalcis brcincornis Klug, was, so 

 far as I knew, first recorded as a parasite of Earias 

 insnlana the cotton bollworm in 190(5. In Januar}' of 

 that year at Gizeh I ol>tained a i)U[)a of luirias which 

 contained two Bvevicornis pupae, l)ut only one of the 

 latter gave rise to an adult. 



This insect had been known to me since 1004, 

 l)ut as I did not then know its host and thus ils 

 great economic interest I unfortunately omitted to 

 make careful notes. However, I well rememl)er that 

 it was numerous at Ghezireh — especially on the 

 yellow llowers of a ilowering shrub — in the autumn 

 of 1904 or in the spring or autumn of 1905. I hope 

 to determine exact facts later from data labels on spe- 

 cimens sent to England for idenlificalion at that 

 period. 



In December 190(3 I look a number of specimens 

 on cotton plants at Gizeh. The insects were sheltering 

 within the involucre of squares and l)oIls. 



For May 1907 I have a note to the effect lliat 

 Chalcis brevicornis was common on a large cotton 

 plant in the laboratory garden Ghezireh. The Chalcids 

 were feeding at the nectaries of the "squares". 



Since 1907, although a special look out has l)een 

 kept and some hundreds of bollworms l)een bred out 

 (collected in field) I have not seen any sign of C. 



