CAMPODE^. 



623 



ones inserted on the subterminal rings of tlie abdomen aid 

 .reatly in locomotion, thongh these insects run with great ra- 

 ;idity and do not leap like the Focluridc, and thns remiiKl 

 us, as well as in their general appearance, ~- ^ 



of certain wingless cockroaches. 



In Lepisma (Fig. 618, L. 4-ser««toPack.) 

 there are long bristles on the tip of the ab- 

 domen, of which three are longest, while 

 Machilis differs in having compound eyes, 

 and longer abdominal bristles. Lepisma 

 saccharlna Linn, is often very common in 

 houses, where it eats holes in silks and 

 silken tapestry, devours the paste and 

 mutilates the leaves of books. L. domes- 

 tica Pack, is a beautiful white hairy 

 species, spotted with black, and is common 

 about fireplaces in Salem. Machais variaUhs bay (PI. 10, 

 figs. 8, 9), is dark brown, with long caudal stylets It is com- 

 mon in the United States. M. orUtalis Pack, inhabits Idaho. 



Campode.k 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^yes, and though the author excludes the Lepismse from 

 the Thysanura, we would suggest that the Campodese seem 

 intermediate between the running Lepismne and the springing 

 Podurie. The antennai 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 

 Podurffi having none (Meinert). The genus Jap^ix of Haliday 

 has short, inarticulate, horny anal cerci. J. solifngus Haliday 

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

 wiien disturijed resembles "a Lithobius in the character of its 

 movements," and bears a remarkable resemblance to a young 

 Forficula. J. switerra^iews Pack, lives in Kentucky. The other 

 genus, Campodea, has many-jointed anal cerci. 0. staphylinus 

 Westw. of Europe lives under stones. C. Amerirana Pack, 

 has similar habits. C. Cnolei Tuck, lives in Mammoth Cave- 



