Insects. 7371 



Polycentropus trimaculatus. May 31, common. 



Liranophiliis rhombicus. May 30, common. 



Leptocerus Auricula. May 31. 



Limnophilus maimoratus. Bred. June 3, very common. 



L. hirsutus. June 1 to June 23, not common. 



Mystacides nigra. June 1. 



Leptocerus aureus. June 1, rare. 



L. dissimilis. June 1 to August 6, scarce. Add, " Abdomen pale 

 green in the female, brown in the male". 



Mystacides quadrifasciatus. June 1 to October. I have taken a 

 variety of this with pale concolorous wings. 



Odontocerus albicornis. June 2. 



Agapetus ciliatus. June 2. 



Limnophilus marmoratus ? A rather remarkable variety, with en- 

 tirely green abdomen, or in some slightly clouded with a whitish line 

 along the spiracles ; the anal appendage broadly ovate at the base 

 and very acuminate, running out into a longish spine ciliated on the 

 margins. June 3. 



L. vitratus ? In addition to Dr. Hagen's description, add, " The 

 apical lobe of the last segment of the abdomen set with decumbent 

 black bristles." 



Leptocerus nervosus. June 3, not rare. 



Rhyacophila dorsalis. Rare, June 5. 



Hydroptila pulchricornis et tineoides. Taktn in cop., June 14. 

 (See Zool. 7111, for further remarks on these so-called species). 

 There appear to be two broods, as they disappear after about a 

 month, and towards the end of August and beginning of September 

 they are again seen in some numbers, though not so numerous as 

 the first brood. 



Leptocerus tineoides. June 15. 



Mystacides ater. Stephens's description of this species is very 

 correct. Dr. Hagen does not appear to mention it ; if he does, there 

 is some confusion, and it seems difficult to clear it up. June 15, 

 scarce. But more of this anon. 



Setodes elongatus. Bred. June 15. Dr. Hagen says, " Case like 

 that of Mystacides, according to Kolenati." The case of S. elongatus 

 is small, slightly curved, and with the larger end straight, not curved 

 outwards like the mouth of a trumpet ; it is composed of a horn-like 

 matter — similar to the polypidoms of zoophytes, the genus Tubularia 

 for instance — mixed with a very fine silk-like substance, which gives 

 the case a transversely striated appeaiauce under a lens. 



