ART. 17 MASKELL ASTBEOLECAN'IIN'AE MOERISOlSr 11 



with tubular ducts; anal region very slightly developed, the ring a 

 simple collar with short internal tube, apical setae somewhat differ- 

 entiated. 



Larva dimorphic, normal form elliptical; antennae 4 to 6 seg- 

 mented; legs normal; beak short conical, 1-segmented; spiracles 

 not unusual, accompanied by one or more quinquelocular disk pores, 

 8-shaped pores in a marginal only or marginal and incomplete inter- 

 mediate rows, no submedian row; no other pore types developed; 

 anal region practically undeveloped, anal ring a small simple collar, 

 apical seta differentiated, short or long; dimorphic form quite simi- 

 lar to that stage here regarded as second stage female. 



CALLOCOCCUS ACACIAE (Maskell) 



Plate 4, figs. 1-10; Plate 5, figs. 1-9; Plate 27, fig. 5 



Reference.— Fernald, Cat. Cocc. World, 1903, p. 85. 



The Maskell collection possesses five slides of this species, one of 

 '' female with larvae, 1892," two of " adult female, 1892," one of 

 " 2nd stage females and larva, 1892," and one of " larva, 1892." 

 None of these is particularly good. There are also several un- 

 mounted specimens, attached to the host twigs, under No. 282. 

 Additional specimens, apparently representing this species, collected 

 in New South Wales by Mr. George Compere, have also been 

 examined. 



Adult female. — External appearance and secretion as described by 

 Maskell, and as figured here ; body as mounted very broadly ellipti- 

 cal, length about 2.7 mm., width about 2.5 mm.; derm membranous 

 or faintly chitinized and indistinctly areolate over the mid-dorsal 

 area at maturity; antennae represented by flat or very slightly pro- 

 truding plates, each normally bearing three or four stout setae and 

 one or two pores; legs lacking; spiracles stout, with short broad bar 

 but only a few (around half a dozen) quinquelocular disk pores near 

 opening; beak uncertain; body setae chiefly, and perhaps wholly, 

 confined to the limits of the pore band, not conspicuous, stiff, around 

 10/A long, the two probably corresponding to the apical setae about 

 18/x long; no differentiated marginal setae; no spiracular spines; 

 8-shaped pores, so far as observed, restricted to the median longi- 

 tudinal dorsal pore band, in this species much broadened and occupy- 

 ing fully a third of the dorsal area, and to a few in the region of 

 the genital opening ventrally, small but numerous, with a fairly 

 thick wall and a delicate internal tube from the middle; tubular 

 ducts, with cylindrical tube showing, under some conditions, a 

 fluted wall and a quinquelocular appearance from the end view, and 

 normal small quinquelocular pores intermingled with the 8-shaped 

 pores to form the pore band, probably in definite pattern, but this 

 not certainly determinable from the material examined; some other 



