408 



INSECTS INJURIOUS TO THE ORANGE, 



Fig. 422. 



insect. Besides the orange, lemon, and other members of the 

 Citrus family, it is found on the olive, pear, apricot, plum^ 

 pomegranate, apple, and a number of other trees, shrubs, and 

 plants. The scales are usually found on the smaller twigs. 

 In Fig. 421 they are shown, of the natural size, on an olive- 

 twig; and at a in the same figure a scale is shown mag- 

 nified. The scales 

 are blackish brown, 

 marked with ridges 

 and indentations, as 

 indicated in the fig- 

 ure. The eggs are 

 of a long, oval form 

 and yellow color. 

 The male, though 

 diligently sought 

 for, has not yet been 

 discovered. 



In Fig. 422 is 



shown the male, and 



Fig. 423 the 



Fig. 423. 



in 



female (both en- 

 larged), of a very 

 interesting little fly, 

 Tomocera Califor- 

 nica Howard, which 

 is a parasite on this 

 black scale. The 

 wings, which are 

 transparent in both 

 sexes, measure, when 

 spread, a little more than one-eighth of an inch across. Its 

 general color is deep blue-black, with a metallic lustre and 

 brown markings. The male may be distinguished from the 

 female by its shorter body and peculiar antennae. This para- 

 site is so abundant in some sections that as large a proportion 



