The subgenera Glabrobracon Fahringer, Lucobracon Fahringer and Uncobracon Papp of the genus Bracon Fabricius (Hymenoptera, Braconidae, Braconinae) in China, with the description of eleven new species
Author
Li, Yang
Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China & College of Chemistry and Life Sciences, Chengdu Normal University, Chengdu 611130, China & Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China
Author
He, Jun-hua
Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
Author
Chen, Xue-xin
Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China & State Key Lab of Rice Biology, Zhejiang University, Hangzhou 310058, China & Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China & Zhejiang Provincial Key Laboratory of Biology of Crop Pathogens and Insects, Zhejiang University, Hangzhou 310058, China
xxchen@zju.edu.cn
text
Deutsche Entomologische Zeitschrift
2020
67
2
209
252
http://dx.doi.org/10.3897/dez.67.57668
journal article
http://dx.doi.org/10.3897/dez.67.57668
1860-1324-2-209
41F77B2A0E1C4874AE891E72B3DD6A32
4B9527FBB0895BB49FCDA395D4DA02C1
Bracon (Lucobracon) curculiovorus
sp. nov.
Figs 17
, 18
Type material.
Holotype
. ♀, China, Neimenggu Prov., West area, 17.V.1985, Wu Mingzhuo, No. 853213 (host
Curculio
spp.) (ZJUH).
Paratypes
. 2♀♀9♂♂, same data as holotype, No. 853213 (2 specimens), 853214 (9 specimens) (host
Curculio
spp.) (ZJUH).
Diagnosis.
This new species is very similar to
B. (L.) histeromeroides
Sarhan & Quicke, 1990, but can be separated from the latter by the following characters: temples slightly convex behind eyes (approximately parallel-sided behind eyes in
B. (L.) histeromeroides
); metasomal tergites yellow, second to seventh tergites with blackish-brown spots (entirely dark brown); fore wing vein SR1 1.7
x
longer than vein 3-SR (2.0 times); propodeum without medio-longitudinal carina (with short medio-longitudinal carina posteriorly and with striae laterally); setose part of ovipositor sheath about 2/3 the length of metasoma (half as long as metasoma).
Description.
Holotype
, ♀, length of body 5.0 mm, of fore wing 4.0 mm, of ovipositor sheath 1.8 mm.
Head
. Antenna short, approximately as long as head and mesosoma combined, with 22 segments; apical antennal segment slightly acute, 1.8
x
longer than its maximum width (Fig.
18k
); first flagellomere 1.4
x
longer than wide, 1.1 and 1.2
x
longer than second and third, respectively, the latter being 1.1
x
longer than wide; malar suture rather weak, with dense short setae; clypeus height: inter-tentorial distance: tentorio-ocular distance = 3: 14: 5; clypeus sparsely short setose; eye not emarginate (Fig.
18g
); face largely smooth except for a few weak punctures and with long setae especially laterally (Fig.
18g
); eye height: shortest distance between eyes: head width = 12: 19: 34; frons smooth, nearly not concave behind antennal sockets, median groove strongly reduced (Fig.
18h
); vertex smooth, with sparse short setae; shortest distance between posterior ocelli: minimum diameter of elliptical posterior ocellus: shortest distance between posterior ocellus and eye = 3: 3: 8; temples weakly expanded behind eyes (Fig.
18h
).
Mesosoma
. Length of mesosoma 1.5
x
its height (Fig.
18c
); notauli impressed anteriorly, shallow posteriorly (Fig.
18d
); mesoscutum smooth, with dense long setae along notaulic courses (Fig.
18d
); scutellar sulcus deep, moderately wide, with crenulae (Fig.
18d
); scutellum smooth, with dense short setae posteriorly; metanotum moderately convex medially (Fig.
18d
); propodeum smooth, without medio-longitudinal carina posteriorly and sparsely setose medially, with dense long setae laterally (Fig.
18d
).
Wings
. Fore wing (Fig.
18a
): damaged apically; SR1 not reaching tip of wing; SR1: 3-SR: r = 40: 24: 15; 1-SR+M more or less straight, 1.4
x
longer than 1-M; 2-SR: 3-SR: r-m = 22: 24: 15; m-cu straight, 2.1
x
longer than 2-SR+M; angle between 1-SR and C+SC+R about 80°; cu-a weakly postfurcal. Hind wing (Fig.
18b
): SC+R1: 2-SC+R: 1r-m = 14: 3: 7.
Legs
. Length of fore femur: tibia: tarsus = 16: 20: 25; length of hind femur: tibia: basitarsus = 25: 42: 14; length of femur, tibia and basitarsus of hind leg 2.3, 7.0 and 4.0
x
their maximum width, respectively; hind tibial spurs 0.3 and 0.4
x
as long as hind basitarsus.
Metasoma
. Length of first tergite 1.4
x
its apical width; first tergite concave medio-basally, median area convex and smooth (Fig.
18e
); lateral grooves of first tergite narrow, only with a few weak crenulae medially (Fig.
18e
); median length of second and third tergites about equal; second metasomal suture narrow and shallow, without crenulate, straight medially (Fig.
18e
); second to seventh tergites smooth, with some short setae posteriorly and laterally (Fig.
18e
); setose part of ovipositor sheath 0.5
x
as long as fore wing.
Colour
. Head and mesosoma largely reddish-brown (Fig.
17
); antenna, eyes, mandible apically, stemmaticum, middle lobe of mesoscutum anteriorly, lateral lobes, median area of metanotum, propodeum medially blackish-brown (Fig.
18c, d, g, h
); legs largely yellow, claws, middle and hind femur (but apically yellow), hind tibia apically dark brown (Figs
17
,
18f
); metasomal tergites largely yellow, first tergite medio-basally, second tergite (but medio-basally yellow), third to sixth tergites laterally and posteriorly, seventh tergite posteriorly blackish-brown (Fig.
18e
); ovipositor sheath blackish-brown (Fig.
17
); wing membrane pale yellow, pterostigma and veins yellowish-brown (Fig.
18a, b
).
Variation
. Length of body of female 4.8-5.5 mm, of fore wing of female 3.9-4.5 mm, and of ovipositor sheath 1.8-2.0 mm; antenna with 22-26 segments; fore wing vein m-cu 1.7-2.1
x
longer than vein 2-SR+M; fore wing vein cu-a interstitial or weakly postfurcal; third-seventh segments of antenna sometimes paler than of holotype.
Male
. Length of body of male 3.9-4.5 mm, of fore wing of male 3.1-3.5 mm; antenna relatively longer, with 38-40 segments, uniformly black brown; head dorsally largely blackish-brown; scutellum, metanotum and propodeum uniformly blackish-brown; second metasomal tergite sometimes without blackish-brown spot; blackish-brown spots of third to sixth tergites sometimes relatively small.
Biology.
The type series has been reared from
Curculio
spp. (
Coleoptera
:
Curculionidae
).
Distribution.
China (Neimenggu).
Etymology.
Named after the generic name of the host (
Curculio
spp.) and
"voro"
(Latin for
"devour"
).
Figure 17.
Bracon (Lucobracon) curculiovorus
sp. nov., ♀, holotype, habitus lateral.
Figure 18.
Bracon (Lucobracon) curculiovorus
sp. nov., ♀, holotype.
a.
Fore wing;
b.
Hind wing;
c.
Mesosoma, lateral view;
d.
Mesosoma, dorsal view;
e.
metasoma, dorsal view;
f.
Hind leg, lateral view;
g.
Head, front view;
h.
Head, dorsal view;
i.
Head, lateral view;
j.
Scapus outer side, lateral view;
k.
Apex of antenna;
l.
Apex of ovipositor, lateral view.