NOTES OX BRITISH TRICHOPTERA. 153 



Hagen thinks may only occur in that sex, the female being 

 yet unknown) will readily separate it from all others. In 

 all the other European species the vertex is conspicuously 

 broader than long; in H. opthalmica the difference is the 

 other way. I have taken two specimens between Kew and 

 Richmond, and Mr. Wormald has met with it at the same 

 locality. It appears to be rare, for though I searched for it 

 several times this season, I was unable to meet with a single 

 specimen. Rambur (Histoire Xaturclle des Nevropteres, 

 p. 506, 2) mentions that it occurs in France and Spain, but 

 rarely. 



In the '' Zoologist,'' 1862, p. 8310, Mr. Wormald men- 

 tions having received H. Danubiiy Brauer, and records it as 

 new to this country. I have httle doubt of the identity of 

 his insect with Brauer's species, but do not feel justified in 

 giving it a place in our list at present, as I am not sure that 

 it differs from some of Stephens's species. 



R. M'Lachlan. 



Forest Hill, LondoXj 

 13th Nov. 1863. 



