INSECTS INJURIOUS TO CITRUS GROVES. 5Q9 



0.16 of an inch (4 mm). The naked insect is dark red- 

 dish brown in color, of sub-globular shape, and with 

 a strong spine-like projection at the posterior end of the 

 body. The general white color is often mottled with 

 shades of grayish or light brown, the boundary lines 

 of the plates remaining apparent, even at an advanced 

 age. The back is covered by a convex dorsal plate which 

 is met on each side by six lateral ones, each of which is 

 marked by a radiating nucleus in the centre. The pos- 

 terior plate is larger than the others, possessing two nu- 

 clei, thus indicating that two plates are joined together. 

 The eggs are 0.014 of an inch (0.35 mm) in length, and 

 of a light reddish brown color. 



The newly hatched larvae are dark brown in color, 

 and follow pratctically the same course of development 

 as Ceroplastes floridensis. 



It feeds on oranges, quince, Eupatorium and probably 

 upon a number of the same food plants as C. floridensis, 

 but the species is much more rare than the white scale. 



Treatment: Same as for the preceding species. 



The Cottony Cushion Scale. (Icerya purchasi Mas- 

 keil). Immediately after the moult by which the female 

 insect passes into the adult stage it is free. from waxy 

 excretion and presents a broadly oval form with two 

 prominent raised surfaces on the second and third tho- 

 racic segments. Its color is still reddish brown, with 

 several dark spots along the front sides, and along the 

 sides of the posterior part of the body, while the anten- 

 nre and legs are black. Just after the insect in any stage 

 has withdrawn from its old shell in moulting, the legs 

 are perhaps the most transparent and whitish parts of 

 the body; but they begin to darken in about a half hour 



