CAMPODE^. 623 



ones inserted on the subterniinal rings of the ilbdomen aid 

 greatly in locomotion, though these insects run with great ra- 

 pidity and do not leap like the Poduriclm^ and thus remind 

 us, as well as in their general appearance, of cer- 

 tain wingless cockroaches. 



In Lepisma (Fig. 618) the eyes are minute, con- 

 sisting of twelve simple eyes, with short bristles 

 on the tip of the abdomen, of which three arc 

 longest, while Machilis differs in having compound 

 eyes, and longer abdominal bristles. Lepisma 

 saccharina Linn., or an allied species, is often very 

 common in houses, where it eats holes in silks and 

 silken tapestry, devours the paste and eats holes 

 in the leaves of books. Mr. W. C. Fish has sent 

 me several pieces of willow from a wicker basket ^^^- ^^^' 

 which he said had been bored longitudinally by these insects, 

 the holes being perfectly round and less in diameter than the 

 body of the insect ; hundreds of these animals were scalded 

 out of the basket. 



Campode^. Meinert. Under this name Dr. Meinert has 

 established a family consisting of two but little known genera, 

 which have flat and elongated bodies and no springing appara- 

 tus, nor eyes, and though the author excludes the Lepismse from 

 the Thysanura, we would suggest that the Campodese seem 

 intermediate between the running Lepismse and the springing 

 Podurse. The antenna are setaceous or filiform, and the feet 

 are adapted for running, with distinct, elongated, two-clawed 

 tarsi. There are two anal cerci arising from the tenth and last 

 abdominal segment. There are six thoracic spiracles, the 

 Podurse having none (Meinert). The genus Japyx of Haliday 

 has short, inarticulate, horny anal cerci. J. soh'fugus Haliday 

 lays few eggs, but those very large. It lives under stones and 

 when disturbed resembles " a Lithobius in the character of its 

 movements," and bears a remarkable resemblance to a young 

 Forficula. The other genus, Campodea Westwood, has long, 

 many-jointed, filiform anal cerci, and the body, especially the 

 upper side, is covered with setse. C. Jragilis Meinert of Eu- 

 rope lives in moist earth and under stones. 



