282 



OETHOPTEEA. 



chestnut - brown ; Periplaneta americana, or the American 

 Cockroach, a much larger species, often an inch and three- 

 quarters long, with a yellowish thorax with chestnut-brown 

 markings, chestnut-brown wings, and the antennae very long. 

 The third species is called the German Cockroach (P. ijer- 

 manica), and is a small yellowish-brown species, with two dark- 

 brown stripes on the thorax. Another species, P. austral- 

 axiii-, i.s also found doing some harm in conservatories. The 

 Black species {B. orientalis) is only winged in the male, the 

 others in both sexes. The eggs are laid in packets, and some- 

 times, as in P. ijermanuri, are carried about by the female. 



Fk;. 162. — Female and Malk common CocKRO^t:^ (^Blalta orientalis). (Xicholson.) 



The young are all pale-coloured, and occasionally almost white 

 when they have just changed their skin. 



Prevention and Remedies. — Persian insect-powder, spread 

 about where these pests are, is a good remedy ; but trapping 

 keeps them well in hand, whilst a hedgehog will speedily clear 

 them out from the basements of houses. Toss's phospho-nicotyl 

 is also an t-xcellent remedy. 



It is not necessary to refer to the Locusts, Grasshoppers, and 

 other Orthoptera, as they are seldom destructive in England. 



