CAMPODE.E. 



G20 



ones inserted on the suotevminal rings of tlie abdomen :iiil 

 greatly in locomotion, tliongh these insects run with great r:i- 

 j)idity ajid do not leap like the Foduridcv^ and thus remind 

 us, as well as in their general appearance, 

 of certain wingless cockroaches. 



In LepUma (Fig. 618, i. 4-ser«ato Pack, 

 there are long bristles on the tip of the ab- 

 domen, of which three are longest, while 

 Mdchilis differs in having compound eyes, 

 and longer abdominal bristles. Lejpisnia 

 saccharina 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 Avhite hairy 

 species, spotted with black, and is common 

 about fireplaces in Salem. Machilis voriabllis Say (PI. 10^ 

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

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



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 Lepisraa- from 

 the Thysanura, we would suggest that the Campodeai seem 

 intermediate between the running Lepismae and the springing 

 J*oduriie. The antenn.ie 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 

 Podura? having none (Meinert). The genus Japyx of Haliday 

 has short, inarticulate, horny anal cerci. J. solifugns Hali(hi\ 

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

 when disturbed resembles " a Lithobius in the character of it^ 

 movements," and bears a remarkable resemblance to a young 

 Forficula. J. s^/^te/rawms Pack, lives in Kentucky. The other 

 genus, Campodea, has many-jointed anal cerci. C. staphylinnx 

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

 has similar habits. C. Cool-ei Pack, lives in Mammoth Cave. 



