Dryinidae (Hymenoptera: Chrysidoidea) are parasitoids of Hemiptera Auchenorrhyncha (Guglielmino & Olmi 1997, 2006, 2007). Dryinus Latreille 1804, is found in all zoogeographical regions. About 242 species have been described (Olmi 1999) and the genus was revised by Olmi (1984, 1991, 1993a).
The species of Dryinus from China were studied mainly by He & Xu (2002), Xu & He (1994a, 1994b, 1998), Xu et al. (2006, 2007, 2008), Yang (1994) and Yang & Ma (1995).
In 2011 the authors examined additional specimens of Dryinus from Hainan Province, China, and have found one new species described herein. The study of the above new material gave the opportunity to present a checklist of Dryinidae from Hainan Province. The checklist is accessible online at Supplementary material http://www.fcla.edu/FlaEnt/fe944.htm#InfoLink2
MATERIALS and METHODS
The descriptions follow the terminology used by Olmi (1984, 1994, 1999) and He & Xu (2002). The measurements reported are relative, except for the total length (head to abdominal tip, with-out the antennae). In the descriptions, POL is the distance between the inner edges of the two lateral ocelli; OL is the distance between the inner edges of a lateral ocellus and the median ocellus; OOL is the distance from the outer edge of a lateral ocellus to the compound eye; OPL is the distance from the posterior edge of a lateral ocellus to the occipital carina; TL is the distance from the posterior edge of an eye to the occipital carina.
The types of all Oriental species of Dryinus were examined.
The material studied in this paper and that in the checklist (Supplementary material http://www.fcla.edu/FlaEnt/fe944.htm#InfoLink2) is deposited in the following collections:
American Entomological Institute, Gainesville, Florida, USA.
American Museum of Natural History, New York, USA.
The Natural History Museum, London, United Kingdom.
Bernice P. Bishop Museum, Honolulu, Hawaii, USA.
Canadian National Collection of Insects, Ottawa, Canada.
Senckenberg Deutsches Entomologisches Institut, Müncheberg, Germany.
Entomological Laboratory, Faculty of Agriculture, Kyushu University, Fukuoka, Japan.
Keizo Yasumatsu's collection, Oonojoshi, Japan.
Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts, USA.
National Museum of Natural History, Budapest, Hungary.
Department of Plant Protection, University of Tuscia, Viterbo, Italy (Massimo Olmi's collection).
Provincial Museum of Alberta, Edmonton, Alberta, Canada.
Rijksmuseum van Natuurlijke Historie, Leiden, The Netherlands.
Hymenopteran Collection of South China Agricultural University, Department of Entomology, Guangzhou, Guangdong Province, P.R. China.
Taiwan Agricultural Research Institute (TARI), Department of Applied Zoology, Wufeng, Taichung Hsien, Taiwan.
National Museum of Natural History, Washington, DC, USA.
Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia.
Department of Plant Protection, Zhejiang University, Hangzhou, Zhejiang Province, RR. China.
Zoologisk Museum, Kobenhavn, Denmark.
SYSTEMATIC ACCOUNTS
Dryinus anotaulicus sp. nov. (Fig. 1)
Material examined: Holotype: Female, CHINA, Hainan Province, Baisha County, Jiujialing, 17-20.VII.2010, Huayan Chen coll. (SCAU).
Diagnosis. Female of Dryinus without notauli and with enlarged claw not reduced, much longer than arolium, with one only subapical tooth and one row of lamellae, without a broad apical lamella. Because of the above characters, the new species should be included in group 2, according to the systematics of Dryinus proposed by Olmi (1993a); see remarks.
Description. Holotype female: Macropterous. Length 3.4 mm. Head black, except mandibles, clypeus and gena testaceous; antenna testaceous; mesosoma black, except lateral margins and posterior collar of pronotum testaceous; metasoma brown; legs testaceous, except hind coxa basally black and club of hind femur partly brown. Antenna clavate; antennal segments in following proportions: 8:6:22:8:7:7:6:6:5:8. Head almost fiat, dull, granulated, without longitudinal keels or striae on face, except complete frontal line; occipital carina complete, laterally not reaching eyes; temple distinct; posterior ocelli almost touching occipital carina; POL = 3; OL = 4; OOL = 8; OPL = 0.5; TL = 5; greatest breadth of posterior ocelli shorter than TL (2:5). Pronotum shiny, crossed by one only strong posterior transverse furrow (anterior transverse impression absent); anterior collar and lateral regions unsculptured; disc weakly humped, granulated; posterior collar short, sculptured by longitudinal striae; pronotal tubercle not reaching tegula. Scutum, scutellum and metanotum granulated, not rugose. Notauli absent. Propodeum reticulate-rugose, without longitudinal and transverse keels; dorsal surface longer than posterior surface (22:16). Forewing with three dark transverse bands; distal part of stigmal vein longer than proximal part (17:7). Hindwing hyaline. Fore tarsal segments in following proportions: 17:3:6:16:25. Enlarged claw not spatulate (Fig. 1), with one large subapical tooth and one row of six lamellae + one bristle. Segment 5 of protarsus (Fig. 1) with two rows of 17 lamellae; distal apex with a group of at least 20 lamellae. Tibial spurs 1/1/1.
Male. Unknown.
Hosts. Unknown.
Etymology. This specific name means that the notauli are absent (anotaulicus = without notauli).
Remarks. The world species of Dryinus are divided into four groups, according to the following key (Olmi 1993a):
Fig. 1.
Chela of holotype of Dryinus anotaulicus sp. nov. Scale bar 0.09 mm.
1 Enlarged claw very reduced, approximately as long or slightly longer than arolium
Group 4
— Enlarged claw not reduced, much longer than arolium
2
2 Enlarged claw without subapical tooth, or with at least 2 subapical teeth; rarely with one only subapical tooth, but then with a very broad apical lamella Group
3
— Enlarged claw with one subapical tooth, never with a broad apical lamella
3
3 Notauli at least partly present Group
1
— Notauli absent Group
2
However, in the Oriental region only groups 1 and 3 have been recorded so far. Group 4 is only present in the Neotropical and Nearctic regions. Group 2 is recorded from all biogeographical regions of the world, except the Oriental region. Dryinus anotaulicus is the first Oriental species of Dryinus belonging to group 2. This new species is easily recognizable among all Oriental species of Dryinus because of the characters presented in the above diagnosis.
ACKNOWLEDGMENTS
We are grateful to Prof. Ducheng Cai, Prof. Xindao Qin, Mr. Zhongrun Zhang, Jingxian Liu, Bin Xiao and Misses Jiemin Yao, Tianfei Chen, Jie Zeng, Jiangli Tan, Manman Wang for their kind help during the survey of Hymenoptera in Hainan. The project was supported by the National Nature Science Foundation of China and the Ministry of Science and Technology of PR. China (MOST Grant No. 2006FY110500).
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