C03KR0ACHES. 



21 



its thorax. One is seen cleaning its under side ; another its hind 

 leg. These are all set as they were seen in life. 



Another common species is Phyllodroma germanica (1172). This 

 insect appears to belong more to Northern Europe. It was rarely 

 met with in England until comparatively recently, but has spread 

 rapidly in London and is now a great pest. There are three British 

 species which are found in woods and among furze bushes or heaths. 

 These are all small species. Some of the species found in the tropics 

 are of considerable size, especially those of the genus Blabera (1 1 86) 

 and Megaloblatta (1173), some of which measure nearly six inches 

 in expanse of the wings. Some species bear close resemblance to 

 Coleoptera. Phoraspis picta (1 1 74) and Coryclia petiveriana (1 1 90) 



Fig. 19. 



Perisphceria glomeriformis, enlarged. (1189.) 



are good mimics of Tortoise-beetles. Prosplecta coccinella resembles 

 a Ladybird (see drawing). 



Perisphceria (1189) can roll itself up into a ball (after the 

 manner of an Armadillo, or wood-louse) ; the end segment of the 

 body fits exactly into the front of the prothorax, so that the head 

 and legs are completely hidden and protected (fig. 19). 



Female Cockroaches may often be found carrying their eggs in 

 a capsule at the end of the body. The eggs are arranged in this 

 capsule in two rows, upright like sacks, alternately right and left, 

 with a single one at each end, the whole being covered with secretion 

 which hardens into a leathery substance (see drawing). The struc- 

 ture is very similar to that of the egg-mass of the Mantidm, but in 

 those each sack contains several eggs ; in the Blatticlce each sack 

 contains but one egg. The number of eggs in the whole capsule varies. 



Panesthia javanica (1192) appears to be viviparous, as the 



