210 ZOOLOGY. 



duce many successive generations, without further sexual 

 intercourse : some of both sexes are winged, and others, 

 without wings. 



11. Chermes. Snout situated on the breast; antennce 

 longer than the thorax ; tsings four, deflected ; thorax 

 gibbous ; feet formed for walking and leaping. 



This genus like the preceding, inhabits the leaves and 

 stems of plants, and by their punctures, produce excressences 

 and protuberances of various sizes and shapes, which 

 are generally found to enclose either the egg or imma- 

 ture insect, in the larvae state, it is six footed, and without 

 wings ; and in the pupa, are two protuberances from the 

 thorax, Avhich are the rudiments, of the future wings. 



12. Cocous. Cochineal-Insect. Snout pectoral; antenn(e 

 filiform ; abdomen bristly behind ; wings in the male, 

 two, upright ; in the female, wanting. 



This tribe of insects abound in warm countries, and in 

 England, are met with in great numbers, in hot and green 

 houses, where they are sxceedingly troublesome ; the males 

 are actire, but the females are very inert, being generally 

 fixed to different parts of plants. It is from a species of 

 Coccus, that the colour so celebrated for its brilliancy, C'or- 

 mine is extracted. 



1 3. Thrips. Snout secreted within the mouth ; antennce 

 the length of the thorax ; plate 3, fig, 25 ; bodj/ linear ; 

 abdomen inclining upwards 3 mngs four, strait, long. 



