European Trichoptera. 305 



B. septentrionis , McLachlan, from Scotland^ has a dorsal 

 lobe and appendices (PI. XIV. fig. 15) very similar to fas- 

 ciata. In coloration and general form it is very distinct, the 

 wings being dark, broad, and somewhat rounded, whereas 

 they are pale, narrow, and longly elliptical in fasciata. 



R. ferruginea, (Scopoli), Hagen. I have not seen this 

 insect, which, according to Hagen {inUtt) is smaller than 

 septentrionis, but with similar lobes and appendices. 

 Scopoli's name cannot be said to apply to this species 

 with certainty. 



B,. aurata, Brauer. The wings almost unicolorous 

 golden-yellow, occasionally with faint darker markings, 

 and a trace of the large pale dorsal spot common to most 

 species of the genus. The dorsal lobe is long and linear, 

 the second joint of the app. inf. deeply furcate, the 

 branches divergent and straight, the lower being broader 

 than the upper; the penis-sheaths are very broad at the 

 base, afterwards produced into a long spine, curved at 

 the tip. (Pl.XIY. fig. 11) . Apparently a common species 

 in the mountains of Central Europe. 



B. venusta, (Pictet, M.S.). This species was formerly 

 wi'ongly united to B. auratahj Hagen (Stet. Zeit. 1859, 

 p. 154), but was afterward (" Synopsis synonymica") 

 separated by him therefrom. It has never been described. 

 Strongly marked individuals show a distinct dorsal pale 

 blotch on the anterior wings, and there are semi-fasciate 

 gray markings, especially towards the apical portion of 

 the wing. Specimens from the Alps and Italy, in my 

 collection, are larger than others taken by Zeller in 

 Upper Carinthia. The dorsal lobe in the male is dilated 

 in the middle and acuminate at the apex (one Alpine in- 

 dividual has this lobe of nearly uniform breadth through- 

 out, but it is not otherwise different) ; the second joint 

 of the app. inf. is furcate, the two branches curved in 

 such a manner as to leave a nearly circular space between 

 them, both branches being almost equal in length, but 

 the lower is considerably the stronger ; the basal piece 

 whence arise the penis and sheaths is produced at its 

 lower edge into a long process, obtuse and curved at the 

 apex, and deeply canaliculate beneath ; the penis is short 

 and straight, and does not project beyond this process, 

 the sheaths curved at the tips (PL XIV. fig. 9) * 



* The appendices figured by Pictet at PL iv. fig. 29, and tlie pupa at 

 PI. XV. fig. Ic, referred to B. vulgaris, belong to R. venusta. 



