COCCIDAE OF OHIO. 41 
Pseudococcus citri (Risso). 
(Mealy Bug) 
Figs. 46, 47, 48. 
Dorthesia citri Risso, Essai, Hist. Nat. des Oranges (1813). 
Dactylopius citri Sign., Ann. Soc. Ent. Fr., (5) v, p. 312 (1875). 
Dactylopius destructor Comst., Rep. U. 8. Dep. Ag., 1880, p. 342 
(1881). 
Adult female: Length 3.5—4mm., width 2—2.5mm., white or 
yellow with brownish tinge, darker than P. longispinus, and with less 
powdery secretions covering body. The seventeen lateral appendages 
are short and blunt; posterior appendages not much longer than 
lateral ones. Antennae 8-jointed, less pubescent than in P. longispinus; 
formula: 832 (17) (564). The penultimate segment bears on either 
side a very long seta, and two or three very short ones, and two conical 
projections, the surface of the segment is dotted with orifices. Six 
slender setae, one-half the length of the setae on the penultimate, are 
borne by the ano-genital ring, which is somewhat projected from the 
penultimate segment. 
Remarks: This species differs from P. longispinus by the 
absence of the long filaments at the posterior end of the body. 
The female is oviparous, laying her eges in a cottony sae, which 
inereases in size with the growth of the adult female. 
Pseudococcus longispinus (Tare). 
Bes) 49s 0) bil: 
Coccus adonidum corpore roseo, ete., Geoff., Abr. Ins., i, p. 511 
(1762). 
Dactylopius longispinus Targ., Catalogue, p. 32 (1869). 
Dactylopius adonidum Comst., Rep. U. S. Dep. Ag., 1880, p. 341 
(1881). 
Female: Length, 2.5—3 mm., width, 1.5—2mm. White or tinged 
with yellow, with brown band on middle of back; each segment with 
a white waxy filament, which forms a border of appendages of varying 
lengths around the body; those near the posterior extremity longer, 
and four at caudal end very long, the inner the longer, sometimes 
longer than body. Entire body appears as if dusted with flour, which 
is caused by the waxy secretion. Antennae 8-jointed, each joint bearing 
several hairs. Formula: 8, (2, 3,) (1, 5,) (4, 6,) 7. The legs are long, 
stouter than in P. citri, somewhat pubescent; tibia twice as long as 
tarsus. The penultimate segment presents on either side a rounded 
group of pores and two short, strong spines, also a seta somewhat 
longer than the anal setae, and several shorter setae. Anal ring large, 
dotted, with six long setae. 
