278 Yorkshire Naturalists at Dent. 



This species is common on apples, and it is the fungus usually mis-called 

 P. glancum. 



A particularly interesting occurrence of an aquatic fungus attacking 

 the water beetles Agabus bipiistiilatus, A . gultatus and Hydroporns rivalis,. 

 was brought to our notice by Messrs. Fordham and H. H. Wallis. This 

 fungus appeared in the form of semi-transparent gelatinous specks, and 

 occasionally as rather larger cushion -shaped pustules on the head, thorax, 

 or elytra of several different specimens of the beetles collected from the 

 pools on Wliemside ; the behaviour of the insects thus attacked was much 

 more sluggish than that of normal specimens. Attempts have been 

 made to isolate the fungus, but owing to the presence of enormous numbers 

 of liquefying and other bacteria this has presented a good deal of diffi- 

 culty. One beetle from which a growth of about 2 sq. mm. was removed 

 was placed in an aquarium for further observation. After several weeks 

 the insect shows no signs of any further development of the fungus, and' 

 it is more active now than when it came into our possession. It is 

 possible, therefore, that the sluggishness observed was not a pathogenic 

 symptom but was due merely to the insect being incommoded by the 

 presence of the fungus growing on its exterior. So far, it may be said 

 that the organism is one of the aquatic Phycomycetes, and that its para- 

 sitic nature appears doubtful. Both insect and fungus are still under 

 observation . 



Very useful assistance was rendered by Miss D. Hilary and Miss 

 R. Mcllroy in the collection of the following species : — 



Armillaria mellea Fr. P. sphinctriniis Fr. 



Omphalia fibula (Bull.) Fr. Anellaria separata (Linn.) Karst. 



Marasmius ramealis (Bull.) Fr. Psathyrella gracilis (Pers.) Fr. 



M. oreades (Bolt.) Fr. Fames annosus Fr. 



Pluteus cervinus (Schaeff.) Fr. Polystictus versicolor (Linn.) Fr. 



Tubaria furfuracea (Pers.) W.G.Sm. *P. velutinus (Pers.) Fr. 



Stropharia semiglobata (Batsch) Fr. Stereimi purpiireum (Pers.) Fr. 



Hypholoma fasiculare (Huds.) Fr. *S. rugosum (Pers.) Fr. 



Psilocybe foeniscesii (Pers.) Fr. S. hirsntitm (Willd.) Fr. 



Psathyra corrugis (Pers.)Fr. Exidia glandulosa (Bull.)Fr. 



Coprinus micaceus (Bull.) Fr. Dacryomyces deliquescens (BuU.)j 



Panaeoliis papilionaceus (Bull.) Fr. Duby. 



D.stillatus (Nees.)Fr. 



*Uromyces flectens Lagerh. on Trifolium repens 



U. Alchemillae Lev. on A. vulgaris 



U. Ficariae Lev. on R. Ficaria 



U . Scillarum Wint. on Scilla nutans 



U. Poae Raben. on R. Ficaria 



Puccinia Centaureae D.C. on C. nigra 



P. Hypochoeridis Oud. on H . radicata 



P. Leontodontis Jacky on L. autumnalis 



P. Chondrillae Corda on Lactiica mttralis 



P. variabilis Grev. on Taraxacum officinale 



P. Hieracii Mart, on H. Pilosella 



P. Betonicae D.C. on Stachys Betonica 



P. tumida Grev. on Conopodium deiuidaium 



P. fusca Wint. on Anemone nemorosa 



P. obscura Schrot. on Luzula canipestris 



P. Caricis Reb. on Urtica dioica 

 *P. glumarmn Er. et Henn. f . sp. Holcina Eriks. on Holcus lauatus 



Phragmidium Fragariastri Schrot on Potentilla Fragariastrum 



P. mucronatiim Schlccht. on Rosa canina 



Urocvstis anemones (Pers.) Wint. on R. ripens 



" Indicates not previously rocordotl for X.W. Div. (V.C. 65). 



Naturalist' 



