G. S. Graham-Smith 
467 
turned out about 10 p.m. and it was found that during the next hour 
the flies settled down for the night. In order to disturb them as little 
as possible the count was made with only sufficient light to see the 
flies satisfactorily. 
Species entering rooms. 
During the season many different species of flies enter rooms. It 
seems to be quite evident that most of the species enter by accident, 
but a few enter designedly with the intention of remaining indoors for 
longer or shorter periods. The numbers of the larger common species 
caught in the dining room during 1914 and 1915 are given in Table II. 
During September, 1914 no records were kept and therefore the 
total number entering during that season is unknown. 
Specimens 1 of many other species were not uncommonly found including Psycho- 
clidae (common), Microchrysa polita (few), Sargus cuprarius and S. iridatus (few), 
Thereva plebeia (few), Syrphidae (common), Platystoma seminationis (common), 
Lonchoea vaginalis (few), Helomyza olens (few), Tephrochlamys canescens (very 
common), Blepharoptera serrata (common), Scatophaga stercoraria (common), and 
S. lutaria (few), Mydaea urbana, M. obscurata, M. meditabunda, M. impuncta, and 
M. uliginosa (few), Coenosia tigrina (few), Fannia manicata (common), F. armata 
(few), F. scalaris (few), Pegomyia bicolor (few), Azelia macquarti (common), Hydrotaea 
irritans (common), Anthomyia pluvialis (common), A. radicum (few), Phaonia 
variegata and P. erratica (few), Chorlophila fugax (few), Grapliomyia maculata (few), 
Musca corvina (few), Brachycoma devia (few), Phryxi vulagris (few), Voria ruralis 
(few), Digonochoeta spinipennis (common), and many other species less commonly. 
Occasionally specimens of such species as C. erythrocephala, P. erio- 
phthalma and P. rudis were found in February and March, in both years. 
On examining Table II it will be seen that some species including 
S. calcitrans, M. liortorum, 0. cognata, Sarcophaga, M. lucorum, P. 
lardaria and P. albolineata were more commonly found in 1914, which was 
a fine year, but Lucilia, M. domestica, M. stabulans and 0. leucostoma 
were more common in 1915. Excluding males of F. canicular is , 
nearly twice as many females as males entered in both years. 
Members of most of the species enumerated come in accidentally, 
remain on or near the windows, and very seldom find their way to the 
darker parts of the room, or go to any food which may be present. 
Most of their time is spent in wandering over the glass and attempting 
to escape. Of some of these species very few specimens enter, but of 
others considerable numbers come in under suitable weather conditions. 
1 Mr Percy H. Grimshaw very kindly identified specimens of all the species Mentioned 
in this list. 
