The house-fly, Musca domestica Linn: its structure, habits, development, relation to disease and control . pmx. Fig. 79. Lesser House-fly, Fannia canicularh L. 80. Stable Fly, Stomoxys calcitrans L. Female. THE LESSER HOUSE-FLY 187 The Lesser House-fly. Fannia canicnlans L. This species (fig. 79) is the less common of the two speciesof Hies found in liuuses. Its occurrence and frequency are, how-ever, very variable, and no valid explanation has been found so farin my investigations to account for this variability. F. canicularisis more abundant than 31. domestica for a
The house-fly, Musca domestica Linn: its structure, habits, development, relation to disease and control . pmx. Fig. 79. Lesser House-fly, Fannia canicularh L. 80. Stable Fly, Stomoxys calcitrans L. Female. THE LESSER HOUSE-FLY 187 The Lesser House-fly. Fannia canicnlans L. This species (fig. 79) is the less common of the two speciesof Hies found in liuuses. Its occurrence and frequency are, how-ever, very variable, and no valid explanation has been found so farin my investigations to account for this variability. F. canicularisis more abundant than 31. domestica for a short time during theearly part of the summer, usually in May and June. With thebeginning of the hot weather the numbers of the latter increaseenormously and replace the Lesser House-fly. In many cases whichwere observed the latter seemed to retreat in small numbers tothe rooms of the house not devoted to cooking, and they may. ^^^y
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