110 Bulletin Wisconsin Natural History Society [Vol. 13, No. 
the usual life cycle is completed in about six weeks this could 
allow for two or three generations of Psychoda to produce the great 
numbers found in the jars at the date of emergence. 
Fig. 1. Psychoda cinerea Banks. A, dorsal view of larva; B, ventral 
view of pupa; C, dorso-lateral view of anal quadrifid processes. 
THE LARVA 
Length 5-5.5. mm., width 0.4-0. 5 mm. The larva is slender, cylindri- 
cal, flattened dorsally and ventrally. Color a translucent watery gray; 
in the pupating larva an opaque white. 
Head somewhat shorter than the prothorax, globular, entirely chitinous, 
light brown, labrum produced, transversely oblong. Eyes present and 
distinct, black. 
Annuli of the thorax and abdomen strongly marked, so that it is diffi- 
cult to separate the true segments from the annuli; this difficulty is greatest 
in the abdominal segments, especially the basal ones. Setae very obscure 
