On some Afrotropical species of Aloencyrtus (Hymenoptera: Encyrtidae): parasitoids of soft scales (Hemiptera: Coccidae)
Author
Prinsloo, Rd. L.
text
Zootaxa
2010
2010-12-08
2716
1
28
journal article
1175-5326
Aloencyrtus umbrinus
(Compere)
(
Figs 6
,
25
,
44
)
Microterys umbrinus
Compere 1939: 16
.
Aloencyrtus umbrinus
;
Prinsloo 1978: 302
.
Diagnosis.
Compere (1939)
provided a fairly detailed description (without any illustrations) of this species, which is known only from the female. The following diagnosis and accompanying illustrations will suffice to distinguish this striking species.
Female.
Length:
2.2–2.6 mm
. Colour: head and thorax mostly dark brown (paler in old, faded specimens) with yellowish-brown suffusions on face and mesopleura, the head with a faint purplish tinge in certain light, the thorax without a metallic lustre; gaster blackish; protruding ovipositor pale. Antenna either overall dark brown to blackish-brown or with club and apical funicle segment blackish-brown and remainder of antenna distinctly paler. Forewing (
Fig. 6
) strongly infuscated from base of linea calva to hyaline cross-band, the disc beyond the band less strongly darkened, as in fig. 6. Legs, including middle tibial spur, brown to blackish-brown with yellowish-brown suffusions except tarsi distinctly paler.
Head in dorsal view 3.8–4.0x as wide as frontovertex, anterior margin of the latter almost straight, without a median notch; head in frontal view (
Fig. 25
) with scrobes deep, steep sided, confluent dorsally, with a broad, rather flat interscrobal prominence and distinct dorsal fovea. Frontovertex and area between scrobes and lateral eye margins with numerous fine, shallow punctations, their diameter distinctly less than that of median ocellus, the lower part of face less conspicuously punctate, the genae without punctations. Antenna (
Fig. 44
) with pedicel a little shorter than basal funicle segment, the latter 3.5–3.7x as long as wide; funicle with segments becoming progressively shorter and wider, II–IV each longer than wide, V quadrate, VI a little wider than long; club as long as apical two and a half funicle segments combined.
Sculpture of mesoscutum and scutellum of similar texture, finely cellulate-reticulate, the integument with a rather polished appearance. Forewing (
Fig. 6
) relatively slender, 2.6x as long as broad; marginal vein 1.5–2.0x as long as postmarginal, the latter less than 0.5x as long as stigmal; setae confined to hyaline cross-band very fine, almost indiscernible, the band appearing asetose under low magnification.
Gaster a little shorter than thorax; ovipositor as long as gaster, about 1.4x as long as middle tibia; gonostyli elongate, slender, about 0.7x as long as middle tibial spur, protruding distinctly caudally.
Male.
Unknown.
Remarks.
This species was hitherto known only from
Kenya
, from where it was originally described by
Compere (1939)
as a parasitoid of
Ceroplastes destructor
on coffee and later recorded by
Crowe (1962)
as a parasitoid of
Ceroplastes brevicauda
Hall
on the same host plant. A number of specimens originating from the same series as the
type
material are available for study in addition to material from
South Africa
from where
A. umbrinus
is here recorded for the first time.
Among those species with similar forewing maculation
Aloencyrtus umbrinus
most closely resembles
A. lindae
and
A. vivo
, differing from these two species in the characters mentioned in their treatments above.
Known distribution.
Kenya
,
South Africa
Material examined.
SOUTH AFRICA
:
Mpumalanga
: Pilgrim’s Rest,
v.1973
, H.P. Insley, ex
Ceroplastes
sp.
on
Morella pilulifera
(
11 ♀
;
T
4738);
KENYA
: Limuru (some specimens without this locality),
14.xi.1935
,
3.iii.1936
,
3.xi.1936
,
18.x.1938
, ex
Ceroplastes
sp.
and
C. destructor
on coffee (
12 ♀
;
T
3156; det. D.P. Annecke).