154 



[December, 



thorax blackisk-fuscous above (the usual warts and lines obscure reddish). Abdomen 

 fuscescent above. Spines of the legs darker, brownish. Anterior-wings smoky- 

 grey, the meinbrane rather thickly sprinkled with whitish-grey dots : ueuration 

 blackish-fuscous. Posterior-wings with a greyish tinge : neuration fuscescent. 



In the S the anal structure is apparently identical with that of the type-form, 

 but the colour is darker. * , 



Length of body, S , 9 mm. Expanse of wings, S , 23 mm. 



It was with astonishment that I realized the connection (and 

 probable specific identity) of the single specimen with M. impunctatus. 

 The latter was separated by me from the decidedly South European 

 (and cave-frequenting) 31. aspersus, E^ambur, in the 1st Additional 

 Supplement (published this year) to my "E-e vision." The typical 

 Jf. impicnctatus is also generally of South or Central European distri- 

 bution. But an additional interest attaches to this Unst insect, 

 because a little more than a year ago, Mr. J. J. King recorded (Ent. 

 Mo. Mag., XX, p. 19) an example of the type-form taken in Dumfries- 

 shire by Mr. Service, and I appended a note thereto, explaining that 

 I had not seen it from farther north than Bavaria, and making, a 

 probably lame, attempt to account for its presence in Scotland. The j 

 smallest ^ of the type-form that I had previously seen expands to 

 33 mm., this J to only 23 mm. (thus in exaggerated correspondence 

 with the other Trichoptera of Unst, and proving its native origin) ; the 

 general colour is so" much darker that the appearance is quite changed, 

 and were it not for the almost unerring characters afforded by the 

 anal parts, the close (and, as I believe, specific) relationship of the i 

 Unst insect to M. impunctatus could hardly have been suspected, j 

 More materials will, I have no doubt, confirm this, but the form is 

 distinctly worthy a varietal name. t'l 



A somewhat parallel case exists with regard to M. aspersus. I 

 have described a form of this {var. canariensis) taken by the Eev, A. 

 E. Eaton at a great elevation on Grand Canary, which also differs 

 from the type-form of that species by its very small size (expanse,. 

 22 — 25 mm.), but the discrepancy is less, and the general appearance' 

 is but little changed. 



Probably many discoveries in the way of Trichoptera have yet to 

 be made in this country, but none of them can exceed the present in 

 interest. 



J 



OX 



tfti 



Halesus EADiATiJS, C— One c? , rather Small, but not differing |, 

 from more southern examples in the character of its markings. ''^ 



Deusus ANjfULATUs, Stcph.— One $ , rather small, but presentingf^ilii, 

 no special features. 



