An Account of the Insects Noxious to Agriculture and Plants in New Zealand: The Scale Insects (Coccididae)Maskell, William Miles
Science
An Account of the Insects Noxious to Agriculture and Plants in New Zealand: The Scale Insects (Coccididae)
Maskell, William Miles
Insects -- New Zealand; Scale insects
Adult female yellowish- or reddish-brown, naked, slightly convex,
elongated; skin smooth, with puncta; length variable, from about 1/7in.
to 1/9in. Antennæ (according to Signoret) with sometimes six, sometimes
seven, joints. Abdominal cleft and lobes normal. The insect excretes a
narrow, white, cylindrical cottony ovisac, which is conspicuous on the
leaf of the plant, and the brown body of the female can be seen at one
end of it. The eggs in this ovisac are numerous, perhaps some hundreds.
Larva and second stage of female flat, oval, yellowish-brown.
Male pupa covered with a waxy, elongated test as in the genus
_Ctenochiton_, but there is no fringe and the segments of the test are
not conspicuous; the test is oval and convex.
Adult male yellowish-grey, the head rounded, with an anterior
protuberance. Two dorsal and two ventral eyes, and two ocelli. Antennæ
of ten joints, all hairy. Feet exhibiting only two digitules, the upper
pair. Abdominal spike short, with two longish setæ on each side, each
pair of which are covered with cotton which is produced into a long
white conspicuous cauda.
Habitat--On camellia. In the South, chiefly in greenhouses. In the Hutt
Valley, Wellington, camellias in the open air are much subject to it.
The female of this species is not unlike _Lecanium hesperidum_, but the
formation of the white ovisac is a clearly distinguishing character. In
late summer the female often drops off to the ground, leaving only the
ovisac observable on the leaf.
Subdivision III.--LECANO-COCCIDÆ, Maskell.
N.Z. Trans., Vol. XVI., 1883, p. 128.
Female insects covering themselves with a secretion of cottony or
felted matter, forming more or less complete sacs. Male insects (where
known) covered with similar secretion.
Genus: ERIOCHITON, Maskell.
Secretion white, felted, formed of threads issuing from prominent spiny
spinnerets; inconspicuous or absent on adult female, thicker on male
pupa. Abdominal cleft and lobes present in all stages of female.[R]
[R] In both of the species here described the adult female has the tibiæ
shorter than the tarsi. The author has hesitated to found a generic
character on it until the discovery of other species; the character is
quite exceptional in the family, occurring (besides) only in some species
of _Acanthococcidæ_. In all others a tibia shorter than the tarsus would
indicate an immature insect.
[This genus contains the insect named hitherto _Ctenochiton spinosus_.]
51. Eriochiton hispidus, Maskell.
N.Z. Trans., Vol. XIX., 1886, p. 47.
(Plate XIII., Fig. 1.)
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