Aptesis grandis Sheng, 1998

Li, Tao, Sheng, Mao-Ling & Sun, Shu-Ping, 2013, Chinese species of the genus Aptesis Foerster (Hymenoptera, Ichneumonidae) parasitizing sawflies, with descriptions of three new species and a key to species, ZooKeys 290, pp. 55-73 : 68-69

Aptesis grandis Sheng, 1998 Figure 34

Aptesis grandis Sheng, 1998. Acta Entomologica Sinica, 41(3): 316.

Specimens examined.

1 female and 2 males, CHINA: Qinyuan, Shanxi Province, 13 June 1994, leg. Mao-Ling Sheng. 11 females and 38 males, CHINA: Qinyuan, Shanxi Province, 20 June 1995, leg. Guo-Fa Chen, Qing-He Zhang, reared from Diprion jingyuanensis ( Sheng and Chen 2001). 6 females and 2 males, CHINA: Hasi Mountains, Gansu Province, 4 to 30 June 2010, leg. Tao Li, reared from Diprion jingyuanensis . 130 females and 101 males, CHINA: Weining County, Guizhou Province, 19 February to 30 March 2012, leg. Tao Li, Mao-Ling Sheng, reared from Neodiprion huizeensis .

Hosts.

Diprion jingyuanensis , Neodiprion fengningensis ( Sheng and Chen 2001), Neodiprion huizeensis ( Hymenoptera : Diprionidae ).

Host plants.

Pinus tabulaeformis , Pinus armandi , Picea crassifolia Kom. ( Pinaceae ).

Distribution.

China (Gansu, Guizhou, Liaoning, Shanxi) ( Yu et al. 2012).

Biology.

The mature larva of Aptesis grandis forms a cocoon outside the body of the Neodiprion huizeensis larva and inside the cocoon of the host. Of 231 adults of Aptesis grandis that emerged from cocoons of Neodiprion huizeensis , the female to male ratio was 1.2: 1. The average parasitism rate of Neodiprion huizeensis by Aptesis grandis was 3.8%. Adults of Aptesis grandis emerged between 20th February to 9th March under laboratory conditions.