488 
Journal of Agricultural Research 
Vol. XXXI, No. 5 
certainty from the larva. However, since the host is included in 
the same plant family as Phormium, since the general locality of 
the collection is identical with that of the species from Phormium, 
and since the larval characters, so far as they can be observed, do 
not contradict the conclusion, it is reasonable to assume that the 
species mentioned in this record is identical with that occurring on 
Phormium, and it is tentatively given such an association. 
(9) After an examination oi the type specimens, Maskell’s Pseu¬ 
dococcus calceolariae, variety minor , has been placed as a synonym 
of Pseudococcus dtri (Risso). 
(10) Certain specimens, obtained from the unmounted portions 
of the Maskell and Canterbury Museum collections of (i calceolariae,” 
are not identical with any of the species already discussed and can 
not be positively associated with any of the Masked records not 
represented by properly identified specimens. One of these species 
is characterized here, despite its lack of definite host or distribution 
records, in the hope that such description wdl expedite the discovery 
of its habitat ana host relationships. The condition of the speci¬ 
mens of the other species is such as to preclude the possibdity of 
accurate description, although it can probably be recognized by 
direct comparison if ever rediscovered. 
DESCRIPTION OP SPECIES 
Genus PSEUDOCOCCUS Westwood 
Pseudococcus ambiguus, new species (fig. 1) 
Adult female. —(Described from a single mounted specimen.) Length 4 
mm., width 2 mm., uniformly elongate oval; antennae broken, legs broken except 
coxae, the hind pair with a few large pores; beak small, elongate conical, length 
153 m, width 107 m, somewhat obscurely 2-segmented; with the cephalic pair of 
cerarii present, each composed of 3 spines surrounded by a cluster of triangular 
pores without definitely associated setae; in addition with 4 more or less distinctly 
recognizable cerarii on each half of the posterior abdominal segments, the apical 
and preapical each with a densely crowded cluster of triangular pores, the 
remainder with scattered clusters, apical cerarii each with 4 long spines and 5 
accessory setae, preapical with 6 to 8 spines of unequal size and 2 to 3 accessory 
setae, next two with 3 small spines and a few pores but no accessory setae, last 
(anterior) with 2 slender spines and a few pores only; remaining cerarii not 
definitely developed, but their location sometimes hinted at by presence of 1 or 
2 well separated, slender spines accompanied by a slightly closer grouping of the 
adjacent triangular pores; anal lobes only slightly produced, no ventral chitinized 
thickening evident, apical setae broken, but, from diameter of base, apparently 
somewhat longer than anal ring setae; anal ring not unusual, with the usual 
inner and outer pore bands and 6 setae, the longest of these about 180 n, pores 
of the usual types, the triangular widely scattered over both the dorsal and the 
ventral surfaces, the multilocular disk pores apparently limited to two small 
clusters, one anterior, the other posterior to the genital opening, plus a few in 
the middle of the segments just anterior to these; small tubular ducts present 
but rare, apparently confined to the posterior ventral abdominal area; body 
setae rather small and not conspicuous, the ventral averaging distinctly longer 
than the dorsal, more slender and varying considerably in size; ventral cicatrix 
moderately large, transverse, irregular in shape. 
Preadult female. —(Based on a single mounted specimen.) In general 
resembling the adult, but with somewhat smaller size or fewer numbers of various 
structures, and with multilocular disk pores wanting. 
The holotype of this species was mounted from a pinned specimen 
included among the specimens of Pseudococcus calceolariae in the 
Maskell collection. As has already been demonstrated in this 
paper, the species is not calceolariae , and it is likewise possible to 
