46 



THE STUDY OF INSECTS 



those of a fish. Hence she calls it a fish-moth. It is especially abundant 

 in warm climates, and often docs damage to starched clothing, book- 

 bindings, and sometimes loosens wall-paper 

 by eating out the paste. Under a micro- 

 scope the fish-moth shows beautiful mark- 

 ings on the shining scales; and at the 

 caudal end of the body are three long 

 bristle-like appendages (Fig. 74), which sug- 

 gest the common name bristle-tail applied 

 to members of this suborder. 



Another common form is the fire-brat 

 (Thenndbia domestica), which resembles 

 the fish-moth in general appearance. It 

 is remarkable for frequenting warm, even 

 hot places, about ovens, ranges, and fire- 

 places. 

 (Afte G r' Lubb7ck.)^ . Figure 75 represents Japyx, a bristle- 

 tail in which the caudal appendages are in 

 the form of horny forceps; and Figure 76 represents the lower 

 side of Machilis, another bristle-tail found under stones and m ackUis, showing 

 bark. This is the form that has vestigial legs on the ab- appendages 

 domen. 



Fig. 76. — 

 Ventral aspect of 



Fig. 76a. — Campodea slaphylinus. 



An illustration of a small, delicate, whitish thysanuran, Campodea 

 slaphylinus, which lives in damp places under stones or in rotten wood 

 and leaves. Note that the thorax and abdomen differ from each other 

 very little in form. This is true of many of these simple insects. (After 

 Lubbock.) 



