INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



375 



THE GOLDEN CHALCID 



Aphelinits diaspidis Howard (Family Eulophidae) 

 (Fig. 374) 



Description.— The adults are exceedingly small and delicate, brfghl 

 yellow insects. 



Distribution.— This species is common throughout the southern part 

 of the State, though it probably occurs in many central and northern 

 sections. 



Cr^^T^ 



Fig. 374. — The golden chalcid, Aphelinits diaspidis How. 

 Adult, greatly enlarged. (After Howard, U. S. Dept. Agric. ) 



Hosts.— It is parasitic upon the red scale, Chrysomphalus aurantii 

 (Mask.), and the rose scale, Aulacaspis rosce (Bouche). 



PARASITE OF THE OYSTER-SHELL SCALE 



Aphelinits mytilaspidis LeBaron (Family Eulophidae) 



Description. — The adult parasites are exceedingly small, being 

 about gV inch long. The color is bright lemon-yellow ; the base of 

 antenna?, dusky; the eyes, dark; the ocelli, red; the mandibles, brown ; 

 the legs and wing veins, bright yellow. 



Distribution.— This species is quite common throughout the State 

 Hosts.— The parasite preys upon a number of scales, among which 

 are the oyster-shell scale, Lcpidosa plies til mi (Linn.), the pine-leaf scale, 

 Chionaspis pinifolice (Fitch), the pernicious scale, Aspidiotus perni- 

 ciosus Comst. and Diaspis carueli Targ. 



THE PURPLE SCALE PARASITE 



Aspidiotiphagtts dtrinus (Craw) (Family Eulophidae) 

 (Fig. 358) 



Description. — The purple scale parasite is an exceedingly small 

 insect, almost microscopic in size, light and brownish-yellow in color 

 with wings, antennas and legs pale yellow. 



Distribution. — This parasite is generally distributed tbroughont the 

 purple scale-infested citrus districts in the southern part of the State, 

 but is often limited or totally absent in certain localities. 11 is most 

 abundant in San Diego County. 



Hosts.— It works uncertainly, but often very effectually, on purple 

 scale, Lepidosaphes beckii (Newm.), in small localities, but of little 



