39^ 



INTllODUCTION to 



Flies, &c. ; and amongst our own the Cuckoo-spit, or Frotli- 

 fly, Tettigonia sjmmaria, and the Froghoppers (see pp. 171, 

 391). 



The second section inchides the Ajjhides, or Green Fly, of 

 which the Bean Aphis is figured at p. 391. PsylUdce, or 

 Jumping Plant-lice ; and Aleyrodcs, or Snowy-flies. 



Apple Mussel Scale : female and eggs, magnified. Twig with Scale, nat. size. 



Male of " Cottony Cusliiou Scale "' (Iccri/a p)t)-chasi), nat. size and mag. 

 (After Prof. liiley). 



The third section is of the Coccidce, or Scale Insects ; here 

 the females are usually fleshy masses, furnished with suckers, 

 but without trace of articulated limbs ; the males have one 

 pair of wings, but the mouth is obsolete. 



For descriptions and life-histories of the above insects, see 

 references in Index, and for history of Icerya imrcliasi, see 

 ' Observations on some Injurious Insects of S. Africa,' by Ed. 



11. HETEEOPTEEA (Westwood). 

 Plant Bugs, Water Scorpions, &c. 



Wings four, the upper pair or wing-cases the largest, partly 

 lapping over each other when at rest, and with the part the 

 nearest to the body leathery and " dissimilar " in texture to 

 the rest of the wing, which is membranous ; under wings 

 membranous, sometimes wanting. 



