SCALE-INSECTS 



jaws brown, and legs and wing- veins bright yellow. The wings are 

 delicate and hyaline, but sometimes with a pale yellowish shade. 

 The males average slightly smaller in size, and the club of anten- 

 nae is a little more truncate at tip. With these exceptions they can 

 hardly be distinguished from the female. (Drawn from Howard's 

 description.) 



This species has been found parasitic on Mytilaspis pomorum 

 (in 111., Mo., N. Y. ?, Calif.) ; Chionaspis pinifoliae (in Mo. ?, B.C.); 

 Mytilaspis sp. on linden (D. C.) ; Diaspis carueli on juniper (D.C.); 

 and Aspidiotus p&rniciosus. It was bred from the last scale by Mr. 

 E. M. Ehrhorn, of California (see Insect Life, vol. iii, p. 487). 



In order to show the efficiency of this parasite, Mr Howard has 

 compiled the following table from Dr. Le Baron's tables, showing 

 that it alone destroyed more than 63 per cent, of the whole number 

 of scales. . 



Whole number of scales collected from apple in different 



gardens 844 



Number with round holes through which this parasite had 



escaped 289 



Number having larvae of this parasite under them .... 244 



Number destroyed by mites or unknown cause 254 



Number of healthy and sound scales 57 



Whole number 844 



Aphelinus fusdpennis Howard : This is a very much smaller par- 

 asite, only 0.06 of a millimeter in length, and with a wing expanse of 

 1.3 mm. Its general color is dull honey-yellow ; the antennae are 

 smoky, blackish at tip ; eyes blackish, ocelli dark crimson ; a distinct 

 transverse black band on occiput behind eyes, scutellum somewhat 

 blackish at tip, abdomen with five dusky transverse lateral bands, 

 legs and wing-veins honey-yellow. Front wings with an indefinite 

 smoky patch below the stigma (spot near front border of wing), and 

 another darker crescent-shaped streak near base of wing, convex on 



