March, 1921] Macro-Fauna of Mirror Lake 171 



Bezzia sp. This form, whether representing one species or 

 more, was scarce, no more numerous than Palpomyia. Most 

 specimens were in the pupal stage. 



Sub-family TanypincB. 



Tanypus pilosellus Loew. This species was rare, as only 

 three specimens, (two larvae and one pupa) were found. 



Tanypus monilis Linn. This species was somewhat more 

 numerous than the preceding, but still scarce. 



Tanypus dyari Coquillet. This species was common in 

 various parts of the small pond, and was the only one common 

 in the waters of the spring, station 13. Unlike most of its type, 

 and more like many of the genus Chironomus it is a bloodworm. 

 Those which lived in the spring, as well as two larvae found at 

 station 17, furnish good evidence that bloodworms may inhabit 

 well aerated waters. A small number were in the pupal stage. 



Tanypus sp. A number of specimens of larvae of this genus, 

 but of other species unidentifiable specifically, were found in 

 about the same localities as T. dyari. 



Tanypus sp. B. This species, tentatively so designated by 

 Malloch ('15), was scarce, that is represented b}^ a few 

 specimens. 



Sub - f a mily Chironomince. 



Chironomus lobiferus Say. This species was common at 

 station 12, but nowhere else. The larvae are bloodworms. A few 

 of the specimens were pup®. 



Chironomus viridicollis Van der Wulp. This was a common 

 species, particularly in some parts of the small pond. It is one 

 of the common bloodworms. Two were found in the shallow 

 station 17. There was one pupa among the identified specimens. 



Chironomus modestus Sa^^ This was a rare species as only 

 two specimens were found, both pupae. 



Chironomus sp. An extremely large number of other spec- 

 imens of this great genus was found. None of these could be 

 identified to species; unquestionably they represent at least 

 several species as can be logically deduced from examination of 

 figures in the table. It is unfortunate that an extremely abun- 

 dant or several abundant or common species can not be listed. 



Tanytarsus sp. This species was one of the abundant ones, 

 particularly (as far as collections show) in some parts of the 

 small pond. A small number were pupae, but the vast majority 



