FOOD AND HABITAT. 
33 
Anthicidce. 
Calandrince. 
Mycetophilidce (fungi). 
Chironomidce. 
Psychodidce. 
Tipulidce. 
Bibionidce . 
Rhyphidce. 
Lonchopteridce. 
SyrphidcB. 
Phoridce (larva?). 
Trypetidce. 
Sapromyzidce. 
Anthomyidce (larvse). 
Thysanoptera ? 
Aradidce (? fungi). 
21. Household Insects. —We cannot separate this class of insect 
clearly from the last or from some others logically, because our household 
insects are simply originally free-living ones that have found a living in 
man’s dwellings. Nor can we make a separate division of them on the 
same scale as the Myrmecophilous insects, as we should perhaps logically 
do. The student will find further information under the heading 
Cosmopolitan insects below. The families concerned are :— 
Thysanura. 
Blattidce. 
Gryllidce . 
Psocidce. 
Termitidce. 
(Nemopterides) 
Formicidce. 
SiVphidcB. 
Trogositidce. 
Cucujidce. 
Nitidulidce. 
Ptinidce. 
Bostrichidce . 
Bruchidce. 
Cerambycidce. 
Pyralidce (Galleriince, Phycitince). 
Tineidce. 
We have excluded external parasites of mammals, though they may 
rightly be included here, since they are classed as above. 
II. Matitne Insects. —Very few insects live in, on, or within reach 
of salt water, probably on account of the difficulties of respiration due 
to the deposition of salts on evaporation of the water. 
Anurida among Aptera , Mpophilus among Coleoptera , Campontia 
among Chironomidce , Eristalis and some allies among Syrphidce live in sea 
water, Halobata , a genus of Hydrometridce lives on the sea. Some 
Forficulidce , Carahidce, Cicindelidce , Staphylinidce , and Muscidce live in 
sea-weed on the beach. 
III. Freshwater Insects. —The student will find fuller informa¬ 
tion under the heading Aquatic insects after the family Odonata below. 
iil 3 
