Lady Beetles (Coleoptera: Coccinellidae) From Chinese Hemlocks Infested With The Hemlock Woolly Adelgid, Adelges Tsugae Annand (Homoptera: Adelgidae)
Author
Yu, Guoyue
Author
Montgomery, Michael E.
Author
Yao, Defu
text
The Coleopterists Bulletin
2000
2000-06-30
54
2
154
199
http://dx.doi.org/10.1649/0010-065x(2000)054[0154:lbccfc]2.0.co;2
journal article
10.1649/0010-065X(2000)054[0154:LBCCFC]2.0.CO;2
Scymnus
(
Pullus
)
robustibasalis
Yu
,
new species
(
Fig. 17
)
Description.
Male. Length
1.65 mm
, width 1.00 mm. Form oval with sides nearly parallel at middle, dorsum moderately convex. Head reddish brown. Pronotum dark brown with anterior corners reddish brown for 1/2 pronotal length, border between colors indistinct. Scutellum black. Elytra black with apical 1/10 reddish brown, border between colors indistinct. Underside black with lateral areas of prothorax and abdomen reddish brown. Legs yellowish brown with middle and hind coxae black. Interocular distance slightly less than 1/2 head width. Innerocular margins arcuate. Frons convex with very fine, dense punctation. Antenna 11segmented, proportions as illustrated (
Fig. 17i
). Maxillary palpus terminal segment nearly parallelsided, slightly convergent anteriorly, length about 1.3 times width, distal side distinctly oblique. Pronotum punctation similar to head. Elytral punctation coarser, pubescence arranged in very weak Sform. Prosternal carinae widely separated at base, anterior 1/2 distinctly convergent. Postcoxal line of first abdominal sternite truncate, complete, extending about 3/4 sternite length; enclosed area finely punctate except posterior 1/3 smooth. Fifth abdominal sternite hind margin shallowly, broadly incurvate; sixth sternite with sublateral setae longest, apex deeply incurvate. Genitalia: Sipho (
Fig. 17a
) relatively stout, basal 1/3 arcuate; siphonal capsule stout, with curved inner process, indistinct outer process; siphonal preapex with finshaped membrane, apex surrounded by membrane with 2 very slender sclerites (
Fig. 17h
). Tegmen (
Fig. 17b, c
) stout; median piece of tegmen nearly parallelsided at middle half, converging gradually to teatshaped tip, in ventral aspect. In lateral aspect, median piece thickest at base, narrowing to sharp tip. Lateral lobes of tegmen distinctly shorter than median piece.
Fig. 17.
Scymnus
(
Pullus
)
robustibasalis
Yu
,
n. sp.
a
) sipho;
b
) tegmen, lateral;
c
) tegmen, ventral;
d
) first abdominal sternite;
e
) ninth sternite of Ƌ;
f
) sixth abdominal sternite of Ƌ;
g
) median piece, ventral;
h
) apex of sipho;
i
) antenna;
j
) maxillary palpus;
k
) outline of the body;
l
) scale for a–f = 0.25 mm;
m
) scale for g–j = 0.1 mm.
Distribution.
China
(
Yunnan
).
Type Series.
Holotype
: (Ƌ),
Yunnan
:
Lijiang
:
Wenbishan
(
26.8 N
,
100.2 E
),
20IV1997
,
Yao D.
et al.
leg. (
BAAF
)
.
Paratype
: (1 Ƌ, same data as holotype) (
BAAF
)
.
Etymology.
The name refers to the shape of the siphonal capsule.
Remarks.
This species resembles
S.
(
P.
)
fraxini wichmanni
Fürsch
(in
Gourreau 1974
) in color pattern, but differs distinctly in male genitalia. The new species is similar to
S.
(
P.
)
ancontophyllus
Ren and Pang (1993)
in the male tegmen, but differs from the latter in the robust siphonal capsule, the membranes on the apex of sipho, and the shape of the fifth and sixth abdominal sternites. It also resembles
S. rhododendri
Canepari (1997)
in the robust siphonal capsule, but the latter, has a small black marking at the base of the pronotum, and the lateral lobes of the tegmen are enlarged and rounded apically in lateral view.