A new species of Förster (Hymenoptera, Ichneumonidae) with a key to species known from China, Japan and South Korea.

A new species of the genus Förster, 1869, Sheng & Zhou, , collected from Zhangwu, Liaoning Province and Songshan National Natural Reserve, Yanqing, Beijing, China, is described and illustrated. A taxonomic key to the species of known in China is provided.

The role of mab-3 in spermatogenesis and ontogenesis of pinewood nematode, Bursaphelenchus xylophilus.

Background: Bursaphelenchus xylophilus is one of the most destructive invasive species, causing extensive economic losses worldwide. The sex ratio of female to male of B. xylophilus plays an important role in the nematode infestation.