32 NOTES ON BRITISH TRICHOPTERA, 



sharply annulated with dark fuscous to the apex ; head and 

 thorax thickly clothed with yellowish-brown hairs; legs 

 clay-coloured, the apex of the tarsal joints darker ; anterior 

 wings pale reddish-brown — an indistinct pale mark at the ar- 

 culus is invisible in dead specimens ; posterior wings blackish- 

 grey, much shorter than the anterior in the male; this is not 

 so apparent in the $ , as the anterior wings are shorter in 

 proportion. Exp. alar. 11 — 13 lin. 



For this fine addition to our list we are indebted to Mr. 

 P. C. Wormald, who is paying great attention to this order, 

 lie found it in considerable numbers at Ruislip, Middlesex, 

 in August. It occurs in many places on the Continent. 



Leptocei'us aierrimuii, Steph. 111. p. 200 — 20 ( $ ) = i. 

 ateVf Steph. ill. p. 196—5 $ = L. caliijinoaus, Steph. 111. p. 

 201-9 ? =X. nicjer, Steph. 111. p. 196—6 (partini) = M. 

 niger, Kol. Gen. et Sp. Trichop. pt. 2, p. 257 — 10; pi. 3, 

 fig. 31. This species is not included in the Synopsis. Much 

 confusion has arisen in consequence of Stephens having made 

 a double error, first, in mistaking this for Pictet's species, and, 

 secondly, in mixing under 7i?^fcr specimens of Pictet's atra 

 and the present insect. This is a true Leptocerus, with 2, 2, 2 

 spurs, and is totally black, with the exception of the antennas, 

 which are annulated with white. It wants the steel-blue 

 lustre so evident in the two black species of 3Iystacides, 

 The anterior wings have at the arculus an ochreous spot more 

 or less distinct. The names atra and nigra being already 

 occupied in a nearly related genus, it will be better to adopt 

 aterrimus for this species ; for although Stephens's types are 

 all females, they at the same time all belong to this insect. 

 This is excessively abundant round any pond in July. With 

 the typical form there is always a variety in which the an- 

 terior wings are very dark reddish-brown, with the pale spots 



