140 THE INSECT WORLD. 
stick-lac, such as it is found concreted at the extremity of the 
branches whence it exudes—it is an irregular brownish crust ; 
secondly, the seed-lac, picked off the branches and pounded ; 
thirdly, shell-lac in scales melted down and run into thin plates, 
which vary in quality according to the proportion of colouring 
matter they contain ; fourthly, thread-lac, which resembles reddish 
threads, and is prepared thus in India. 
One more word about the cochineal. The Coccus manniparus 
which lives on the shrubs (Tamarix mannifera) on Mount Sinai, 
causes to exude from the branches it has pierced a sort of manna. 
The Coccus sinensis produces a kind of wax which is employed in 
China in the manufacture of candles. 
