Corresponding author: Zai-fu Xu (
Academic editor: Michael Sharkey
Hosts of most species of this subfamily are unknown, but a few species are suggested to be parasitoids of
Males of
Two specimens of the genus
The antenna, wings and legs on one side of the type specimen were cut off and mounted on a slide using Canada balsam. Specimens were examined and described using stereomicroscopes Leica MZ12.5 and Olympus SZ61. All pictures were made by Zeiss Imager A1 attached to a digital camera, CoolSNAP, and software Image-Pro Plus.
Abbreviations used in the descriptions as follows: POL= posterior ocellar line, the shortest distance between the posterior ocelli; MOD= mid ocellar diameter; OL= distance between middle and posterior ocelli; OOL=oculo-ocellar line, the shortest distance between the posterior ocellus and compound eye.
Morphological terminology and wing vein nomenclature are mostly based on that of
Antenna with scape distinctly longer than head (
Unknown.
China (Hainan), Malaysia, Indonesia.
This new species can be distinguished from
Holotype Female. Body length 2.3 mm; fore wing length 2.5 mm. Body shiny, with sparse setae.
Unknown.
Holotype, female, China: Hainan, Mt. Wuzhishan (18.85°N, 109.66°E), May 16–20, 2007, Li-qiong Weng, No. 200800122. Paratype: 1 female, same data as type, No. 200800160.
The specific name derives from Greek ‘delta’, meaning triangular, referring to the triangular depression on frons.
The terminal segments and ovipositor structure of these females from China are similar to those of the genus
Males are not known for
1 | Male. Metasoma with five visible segments | 2 |
– | Female. Metasoma with four visible segments. Fore wing venation restricted to basal 1/7; first anal vein distinct; frons with a reversed triangular depression near antennal sockets. China (Hainan) | |
2 | Scape with transparent flange on basal 1/4; frons with median carina forked at upper end near anterior margin of anterior ocellus. Indonesia | |
– | Scape without transparent flange on basal 1/4; frons with median carina not forked at upper end near anterior margin of anterior ocellus. Malaysia |
We are very grateful to Mr. Xin-dao Qin, Zhong-run Zhang, for their kind help during field work in Hainan Province; to Prof Roger A. Beaver and Keith Wilson for their kind help to improve the manuscript English. We thank two anonymous reviewers for their useful comments to improve the manuscript. The project was jointly supported by National Nature Science Foundation of China (No.30770265) and the Ministry of Science and Technology of P. R. China (MOST grant N. 2006FY110500).