Hiy : Mil/ ilia ciiropwa near Scarborough. 455 



The spores, which measure on an averag-e 0*04 mm. in 

 diameter, have a thick outer coat (exospore) which is covered 

 with irreijular ridges, sometimes connected so as to form a net- 

 work (Fig-. 5, IV.). The elaters are o'2 to 0*3 mm. long- and 

 about o'oi mm. in maximum diameter, and show two or some- 

 times three spiral bands. Occasionally one meets with branched 

 V-shaped elaters, and both at the apex and the base of the 

 capsule there occur some elaters differing from the others in 

 being attached to the inner surface of the capsule-wall. These 

 fixed elaters are usually shorter and wider than the free ones, 

 and sometimes show annular instead of spiral thickening--bands. 



Explanation of Plate. 



I. Male plant, from above, showing- the broad midrib covered by 

 toothed scales (male bracts), each of which forms a hood over an anther- 

 idiiim, X 5. II. Female plant, from above. Six archeg-onial g-roups are 

 seen. In the four younger groups the archegonia are surrounded by the 

 involucral leaves (female bracts), the perianth not yet being- developed ; in 

 the two older groups the perianth is represented as being transparent, to 

 show the half-ripe sporogonium within it, x 5. III. Female plant, bearing 

 two ripe sporogonia ; in each case the seta has become elongated, carrying- 

 up tlie capsule, which has not yet dehisced, x 5. \W and \^ Ripe cap- 

 sules, showing- different modes of dehiscence, x 8. VI. Upper portion of 

 one of the valves of a capsule, x 40. 



MUTILLA EUROP/EA NEAR SCARBOROUGH 



AN ADDITION TO THE YORKSHIRE FAUNA. 



Rkv. W. C. hey. 



West Avion. 



A SPECIMEN of Miitilla eiiropcea, a solitary ant, was taken on the 

 moors, near Scarborough, this summer. When I first saw it 

 I was undecided as to its identification. Mr. W. Denison 

 Roebuck, to whom the specimen was forwarded, has submitted 

 it to Mr. Saunders, who confirms Mr. Roebuck's identification. 

 The insect does not appear to have been recorded north of 

 Colchester previously ; the New Forest and the sandy regions 

 (i.e., Bagshot Sands) of Surrey, Dorset, Hants, and Berkshire, 

 are its usual habitats in Eng-land. It is strang-e that the identical 

 moor upon which this Miitilla was found has also yielded to me 

 many examples of insects of a much more northern type than 

 those usually foimd near Scarborough. 



190; Deceniho:' i. 



