March, 1921] Macro- Fauna of Mirror Lake 163 



Family Aphididce. 



A few species of plant lice, living on aquatic plants may be 

 considered aquatic, in at least as reasonable a sense as the 

 Saldida? or Collembola are so considered. 



Rhopalosiphum nymphaeae (Linn.) (?) Many aphids of 

 this genus were found on the duckweed of the small pond, and 

 some at station 5. Most because of immaturity could not be 

 identified to species. 



Macrosiphum coreopsidis (Thomas). A smaller number of these 

 aphids were obtained. A few adults made specific identification possible. 

 The species lives on Bidens, and some specimens were actually taken 

 from emergent vegetation near shore. But the species is not reported 

 from any real aquatic plants and must be excluded from an aquatic list. 



Order Thysanoptera. 



Phlceothrips nigra Osb. A very few were taken while collecting on 

 the surface at station 11. But the}^ were only accidentally there and 

 are entirely land forms. 



Order Neuroptera. 



Family Sialidce. 



Sialis infumata Newman, was the only representative of 

 the entire order and only a single larva was found in the mud 

 at station 3. Probably some others were present, but it must 

 be listed as rare. 



Order Trichoptera. 



Caddis worms were unusually rare as far as my survey 

 demonstrated. The areas having a deep mud bottom, did not 

 offer a favorable environment, but along shore in the large 

 pond, principally in the stony areas, there would seem to have 

 been a very favorable habitat for certain kinds of caddis larvae. 



Phryganea sp. One larva of this genus, taken somehow 

 without the large characteristic cylindrical case, was found at 

 station 3. 



Order Coleoptera. 



A comparatively large number of beetle species was obtained 

 from Mirror Lake. Some of the species were represented by a 

 considerable number of specimens. Large sized beetles, (except 

 one Hydro philiis triangularis) were conspicuously absent. 



Many beetle larvae were obtained, but since the kinds were 

 not recognized in collecting, and the species of a family are 



