Ixi 



situated under a large flat stone near a small stream running 

 into the sea at Mother Ivey's Bay, N. Cornwall, on July 7th, 

 1920. Also a number of the worms extracted from the gaster 

 of the ants. One or two worms occurred in each ant. Nearly 

 all of the mermithogynes possessed a curious hole in the 

 thorax, a point not found before, the object of which was 

 obscure. Numerous normal-winged females as well as mermi- 

 thogjrnes occurred in the nest. The whole nest was carefully 

 dug up and the colony brought home. 



He mentioned that it was the first time he had personally 

 taken these short-winged females, but that his colleague, 

 Mr. Crawley, had done so on several occasions, and was working 

 at a paper on the subject; Mr. Donisthorpe had therefore 

 presented the nest to him. 



Mr. Donisthorpe further exhibited a live specimen of the 

 common Earwig {Forficula auricularia) taken near Wellington 

 College on Sept. 13th last, the forceps of which were practically 

 absent, being represented by the merest rudiments. He 

 suggested that their absence was probably caused by the 

 presence of some internal parasite. 



Dr. Imms and Mr. F. W. Edwards commented on this 

 exhibit, and Mr. Donisthorpe, in replying, observed that the 

 worker ants when attacked by this parasite became larger and 

 developed some female characters. 



Heterocera and Diptera chiefly from N. Italy. — Lieut. 

 AsHBY exhibited a number of moths taken during the summers 

 of 1918 and 1919 in the districts of Vicenza, Arquata Scrivia, 

 and Turin; also a few from France, including Lignicolor 

 furvata from St. Martin Vesubie, and from La Granja, Spain. 



He also exhibited the following Diptera from the above 

 Italian localities. Volucella zonaria, V. pellucens, V. inflata, 

 V. inanis, Eristalis arbustorum, E. aenea, E. tenax, Ocyptera 

 hrassicaria, Leptis tringaria, L. scolopacea, Tipula maxima, 

 Myriatropa florea, Pharia crassipennis, Sphaerophoria dispar, 

 Chrysotoxum maculatum, C. italicum., C. elegans, Milesia 

 crabroniformis, Laphira maroccana, EcJiinomyia grosso, Bom- 

 hylius medius, Brachypalpus vulgus, Catabomba ptjrastri, 

 Tabanus ater, Dasypogon teutonus, Sarcophaga carnaria 

 Xanthogramma citrofasciatum, Calliphora vomitoria. 



