1919. Johnson. — Irish Hymenoptera Aculeata in 1919- 133 



Pompilus bicolor Lep. "^ f sandhills. 



P. plumbeus F. ^Portnoo ^ shore. 



P. niger F. J [shore and Dowros-road. 



Salius fuscus L,— Newry. Mrs. Johnson took this in a friend's garden 



on April 24th. 

 Crabro leucostoraus L. — Lenaderg, Co. Down, taken by Mr. C. M. Davies 



emerging from its burrow in June. 

 C. capitosus Shuck. — A female, Poyntzpass in July. 

 C. palmipes L. — Portnoo, on the sandhills and Dowros-road. 

 Vespa germanica F. — Poyntzpass, September and October. 

 Odynerus pictus Curt. ") /bog road and Dowros road. 



0. trimarginatus Zett. / \ shore. 



Sphecodes affinis v. Hag. — Poyntzpass hill, May, Portnoo, Dowros-road. 

 Halictus malachurus Kirby 1 ^ 

 H. subfasciatus Nyl. ) Portnoo, Dowros-road. 



Andrena cineraria L. — Portnoo sandhills, a battered male. 



Nomada goodeniana Kirby {succincta Panz.) ^ 



N. alternata Kirby | Poyntzpass garden. 



N. ruficornis L. — Poyntzpass hill, Portnoo shore. 



N. bifida Thoms. — Poyntzpass garden, Portnoo shore. 



N. hillana Kirbv ^ 



N. flavoguttata Kirby /Poyntzpass hill. 



Megachile ligniseca Kirby. — Poyntzpass canal bank, August. 

 Poyntzpass. 



IRISH SOCIETIES. 



DUBLIN MICROSCOPICAL CLUB. 



H. A. Lafferty exhibited microsopic preparations of Dodder {Cuscuta 

 epilinum) a member of the Convolvulaceae or Bindweed family parasitic 

 on flax. The preparations showed the method of penetration of the 

 host by the parasite. An appressorium or sucker is at first firmly 

 attached to the cortex of the flax plant, the latter is then penetrated 

 by a cellular outgrowth of absorbing elements from the centre of the 

 appressorium, and by means of these the host is robbed of a certain 

 amount of its nutrient materials. The seeds of the parasite are sown 

 with the flax seed and on account of their small size proper attention 

 to screening would completely eliminate them. 



Sir F. W. ]\IooRE exhibited Rhizoctonia violacea, parsitic on roots of 

 Mangel. A considerable extent of the surface was covered by this fungus, 

 and much injury was caused to the interior tissues, which were broken 

 down and decaying. 



J. N. Halbert showed specimens of Flanorbis corneus from the 

 Royal Canal, near Dublin, an account of which is given on pp. 135-6. 



