Doryctes petiolatus Shestakov 1940

Cao, Liangming, Yang, Zhongqi, Tang, Yanlong & Wang, Xiaoyi, 2015, Notes on three braconid wasps (Hymenoptera: Braconidae, Doryctinae) parasitizing oak long-horned beetle, Massicus raddei (Coleoptera: Cerambycidae), a severe pest of Quercus spp. in China, together with the description of a new species, Zootaxa 4021 (3), pp. 467-474 : 469-470

Doryctes petiolatus Shestakov 1940

( Figs. 7 , 9–14 )

Doryctes petiolatus Shestakov, 1940: 5 ; Telenga, 1941: 99, 285; Belokobylskij, 1998: 60; Belokobylskij et al., 2012: 56 .

Material examined. 1♂, China, Liaoning Province, Kuandian, County, Daxicha Forest, 9.VII.2009, N40°44′ 58″, E125°11′ 35″, 446 m altitude, Yang Zhongqi leg.; 1♀, China, Liaoning Province, Kuandian County, Daxicha Forest, 10.VII.2009, N40°44′ 58″, E125°11′ 35″, 446 m altitude, Yang Zhongqi leg.; 6♀♀4♂♂, China, Liaoning Province, Kuandian County, Daxicha Forest, 25.VI.2009, N40°44′ 58″, E125°11′ 35″, 446 m altitude, Yang Zhongqi collected cocoons, 28-30.VI.2009 emerged.

Host. Young larva of M. raddei (new record).

Remarks. Doryctes petiolatus Shestakov belongs to genus Doryctes Haliday , which is a widely distributed genus, comprising 83 known species until now (Yu et al. 2012). Thirteen species are distributed in China ( Belokobylskij et al. 2012). Doryctes (Doryctes) petiolatus Shestakov is distributed in Heilongjiang, Jilin, Liaoning, Shaanxi, Henan and Zhejiang, but its host is previously unknown. Here we first discovered that D. petiolatus is a solitary or gregarious ectoparasitoid of M. raddei . Its cocoons ( Fig. 10 ) are oblong with exochite white and opaque. In Liaoning Province, Northeast China, adult emerging is from end of June to early July.

Distribution. China; Kazakhstan; Korea; Russia.

Figures

FIGURES 5 – 8. 5, young larva of M. raddei under the bark; 6, some of mature larvae of M. raddei from one tree; 7, emergencing of Doryctes petiolatus Shestakov; 8, cocoon of Rhoptrocentrus quercusi sp. n..

FIGURES 9 – 14. Doryctes petiolatus Shestakov. 9, 13, 14, ♂; 10 – 12, ♀. 9, Habitus; 10, 11, head; 12, head and mesosoma; 13, mesosoma; 14, metasoma. 9, 10, 13, 14, dorsal view; 11, frontal view; 12, lateral view.