INSECT PESTS AFFECTING THE CITRUS. 253 



Treatment. This scale is somewhat difficult to destroy, and 

 will only yield effectually to the gas treatment (formula 

 No. 4). 



(2) LONG SCALE. 



This species, like the preceding one, is very common through- 

 out Florida, and is usually associated with M. citricola. It 

 infests citrus trees principally. 



Scale of female differs from M. citricola in being much nar- 

 rower, color light yellow, varying to light brown. Female, 

 body light purple. Egg white when first laid, becomes tinged 

 with purple before hatching, and they are arranged in two 

 rows, in an irregular manner. Scale of male similar in form 

 to that of the female. 



Treatment. Like the preceding one, this scale is difficult to 

 destroy. Use the gas treatment (formula No. 4). 



Genus ICERYA, Signoret. 



Antennae eleven-jointed, body covered with a cottony matter 

 of several shades of color, and with a secretion of still longer 

 filaments. Skin with rounded spinnerets and with long, scat- 

 tered hairs. Antennae of nearly the same size throughout 

 their whole length, and with a long pubescence. The digitules 

 of the claw elongated and buttoned; of the tarsi as simple 

 hairs. Genital apparatus terminating in a tube internally, 

 with a reticulated ring, and without hairs at its extremity. An- 

 tennae of the larva six-jointed, with a very long pubescence and 

 with four hairs upon the last joint much longer than the others. 

 Lateral lobes of the extremity of the abdomen with a series of 

 three very long, frequently interlaced bristles. 



COTTONY CUSHION SCALE. 



A cottonylike insect, infesting citrus trees and ornamental 

 plants. 



Adult female dark orange red, legs and antennae black, 

 covered with yellowish powder. Egg-sac white, tinged with 

 yellow, and is ribbed longitudinally, and longer than the body 

 of the insect, filled with loose cottony mass containing the eggs. 

 Egg oval in shape, red, 0.7 mm. long. Newly hatched larva 

 reddish brown, antennae six-jointed, begins in a short time to 

 excrete tufts of yellow waxy matter along the dorsal surface 



