colour, and is provided with a very different . tail ; 

 indeed, the tail is the part by which we distinguish 

 one male Arrenurus from another, and it is very 

 wonderful that it should differ so greatly in every 

 species of the same family. I shall not attempt to 

 describe this difference, as I think the figures will do 

 this in a better, quicker, and more pleasant manner, 

 and I trust many of my readers will be induced to 

 search for, and examine the creatures for themselves. 

 Arrenurus crassicaiuiatus (Kramer). — This mite 

 much resembles in size and colour the mite just 

 described, but differs in having the central part of 



ON THE BRITISH BRAMBLE PHRAGMIDIA. 



P 



HRAGMIDIUM BULB OS UM is a fungus 

 well known to the British microscopists, and 

 as a microscopic object it owes not a little of its 

 popularity to Science-Gossip, in the pages of which 

 many years ago Dr. Cooke gave a figure of its spores, 

 which, doubtless, many readers still remember. Like 

 many other fungi, the phragmidia suffer from a 

 plethora of synonyms ; there are only eight European 

 species, yet they have had some thirty or more names 

 given to them by various authors ! Two well-marked 



Fig. 20. — Arrenurus perforatus, $ (under side) 



Fig. 21. — Teleutospore of Phragmidium 

 i violacemn germinating. 



the tail shaped like the head of a spear, and scarcely 

 projecting beyond the general contour of the tail. I 

 think I am right in considering it to be the mite 

 described by Kramer under the name of " crassi- 

 caudatus." 



Arremincs perforatus (mihi). — This beautiful mite 

 was described and figured by me in Science-Gossip 

 for December, 1881 (p. 269). The tail, as will be 

 seen by the figures, is very different from those of any 

 of the other tailed mites ; the hind legs, like those of 

 the three preceding species, do not possess the spur, 

 which is so marked a character in some of the male 

 mites of this family. 



The Norwich Natural Science Club has lately 

 changed its name to that of the " Norwich Natural- 

 ists' Field Club." The meetings are held in the 

 Parochial Hall, South Higham, every Friday evening 

 at So'clock, at which papers are read by the members 

 on natural history subjects. The officers for the 

 present year are : chairman, H. J. Thouless, Esq. ; 

 treasurer, A. Notley : secretary. G. H. Perris. 



species occur in this county upon living bramble leaves. 

 These species are generally confounded under the 

 one name, namely P. bulbosum. My attention was 

 recently drawn to them by] my friend Mr. Soppitt, 

 who kindly sent me specimens of both kinds from York- 

 shire. The accompanying figures are drawn to scale 

 of 450 diameters by the camera from Mr. Soppitt's 

 specimens, and serve to show the difference between 

 two typical teleutospores, one of each species. The 

 first, P. rubi, Pers., is rather the more slender of the 

 two, it has a larger number of septa, and the papilla 

 surmounting the body of the spore is the longer and 

 more pointed. The sori are smaller, more compact, 

 and generally do not spring from discoloured spots. 

 The other species, P. -diolaceum, Schultz, is probably 

 the more common. It has normally triseptate teleu- 

 tospores, with smaller and more blunt papilla?, and the 

 upper surface of the leaf from which they spring is 

 marked with purplish-violet spots. It may be worth 

 while to remark that these phragmidia have not only 

 uredospores, but also recidiospores. The former are 

 well known, but the latter have been hitherto, in this 



