NEW INSECT LIFE HISTORIES. 1 
By Richard A. . Muttkowski 
In the course of certain studies on the insect fauna of Lake 
Mendota, at Madison, Wis., the writer has had opportunity to 
collect, breed, and otherwise obtain the early stages of a large 
number of aquatic or semiaquatic insect forms. A number of 
these prove to be known, others partially, others entirely unknown. 
The history of two of these forms is given in the present paper. 
The writer proposes to add to these from time to time, as far as 
opportunity will offer and his material will permit. Among 
the latter the writer numbers the partial and complete histories 
of a number of local and some western and Alaskan forms belong- 
ing to various insect orders. 
PSYCHODA CINEREA Banks 
Early in January 1915 a large number of insect larvae were 
noticed in three vegetable cultures in the invertebrate laboratory 
of the University. These larvae were determined as those of a 
Psychodid, or moth-fly, as popularly known. The jars were 
set aside for observation; some days later many hundreds of 
hatched specimens were obtained from one of them. These 
proved to belong to Psychoda cinerea banks of which the larval 
stages have thus far been unknown. 
The writer is indebted to Dr. Nathan Banks for the determina- 
tion. 
Upon examination of the vegetable culture the writer finds 
from the species of plants, and certain other indications that the 
cultures were made up from material collected from University 
Bay of Lake Mendota. This, however, does not mean that the 
specimens were brought in from the lake although such an assump- 
tion would be not at all improbable. As far as can be ascertained, 
the cultures were in the laboratory for several months. Since 
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