LoO TRICHOPTERA. 



identical with the North American Halesns (^Stenophylax) 

 jmnctatissimus, Walker, and wrongly introduced into our 

 lists. A careful comparison convinces me that, though 

 closely allied they are Sj3ecifically distinct, one of the most 

 striking characters being, that while the inferior appendices 

 in the English insect run to a sharp point, in the American 

 species these parts are slightly dilated at the apex, which is 

 truncated. AnaboUa cluhia should be referred to Stenophylax. 



Stenophylaxi concentriais, Kolenati. I received a spe- 

 cimen from Mr. Birchall, taken by him at Killarney. 



Chcetopteryx. I am inclined to believe that we possess 

 only one species of this genus in this country, but 1 have not 

 yet sufficiently matured my observations. 



Leptocerus hicolor, Curtis. From the character of the 

 neuration this will form a new genus. 



Mystacides. In this genus, in the restricted sense in 

 which it is used by Dr. Hagen in the Annual for 1860, I 

 have discovered a very remarkable structure, constant in all 

 three species. About the middle of the costal margin of the 

 posterior wings is a row of minute hooked bristles, which fit 

 into a narrow fold on the opposing margin of the anterior 

 wings, and thus serve to keep the wings together when in 

 flight, in the same manner as in Hymenoptera, only that in 

 3Iystacides these bristles are much more numerous than in 

 any Hymenopterous insect. I cannot see an analogous 

 formation in any other genus of Trichoptera. 



Setodes notata, Rambur. I fear that some error has oc- 

 curred as to this insect (see " Annual," 1862, p. 33), and 

 that for the present it had better be erased from our list. 



Rhyacophila ohliterataj M^Lachlan. I visited North 

 Wales in September of this year' and found this insect, which 

 was described for the first time in last year's *' Annual," 

 plentiful in all the mountain streams, and obtained a fine 



