JUL I 





Vol VI OCTOBER, 1889. No. 48. 



7775" MEALY BUGS Of THE UNITED STATES. 



The mealy bugs derive their name from the white, mealy 

 powder with which their bodies are covered. They are furnished 

 with six legs and two antennae; the adult male is provided with 

 a single pair of wings, but the female never acquires these or- 

 gans. The following tables will aid in determining the different 

 species known to occur in this country. Adonidum longifilis, 

 and the male of citri are unknown to me : and their places in the 

 following tables are assigned to them in accordance with the ex- 

 cellent descriptions of these species given by Prof. Comstock in 

 the Report of the U. S. Dept. of Agriculture for the year 1880. 

 The male of Ryani is at present unknown. 



Females. 



1. — Joint 6 of antennae longer than 3; the two anal append- 

 ages as long as the entire body adonidum, Linn. 



Joint 6 ol antennae shorter than 3 2. 



2. — Seventh antennal joint much shorter than the second. .3. 

 Seventh antennal joint as long as the second; anal ap- 

 pendages never one-half as long as the body; eggs de- 

 posited in a cottony mass citri, Boisd. 



3. — Anal appendages as long as the entire body 



longifilis, Com. 



Anal appendages never as long as the body 4. 



4. — Body thickly covered with mealy matter, first antennal 

 joint shorter than the fifth; young brought forth alive; 



no cottony egg-mass Crawii, n. sp. 



Body nearly naked, first antennal joint longer than the 

 fifth; eggs laid in a cottony mass Ryani, n. sp. 



Males. > 



1. — Joint 6 of antennae shorter than 10 2 



Joint 6 longer than 10 3 



2. — Antennal joint 8 longer than 7 adonidum, Linn. 



Antennal joint 7 as long as 8. citri, Boisd. 



3. — Expanse of wings 7 mm. (over one-fourth of an inch) 



Crawii, n. sp 



Expanse of wings 2.6 mm. (about one-tenth of an inch) 



longifilis, Com. 



The Orange Mealy-bug (Dactylopius citri, Boisduval; 

 Synonyms: D. destructor, Comstock, Coccus phyllococcus, 



