Macrophya sibirica, Forsius, 1918

Liu, Mengmeng, Li, Zejian & Wei, Meicai, 2020, Key to the Macrophya sibirica group (Hymenoptera: Tenthredinidae) with description of a new species from China, Zoologia (e 51168) 37, pp. 1-8 : 2

Macrophya sibirica species group

Diagnosis. Species of the Macrophya sibirica group can be recognized using the diagnosis provided by Li et al. (2016), and in particular by the following combination of morphological characters: body mainly black, partly white, without metallic tinge; antenna entirely black; apical margin of labrum usually white; clypeus usually largely or entirely black; anterior margin of clypeus incised (usually not deeply), lateral lobe short; posterior corner of metepimeron sub-quadrate, without appendage; abdominal tergum 1 usually with white maculae, but sometimes completely black in a few species; anal cell of forewing usually with a short, erect cross-vein, or in some species with a middle petiole, shorter than vein cu-a; ergot of penis valve distinct.

The M. sibirica group comprises a large portion of the Macrophya species and is morphologically similar to the M. malaisei group by having the anterior margin of clypeus roundly incised, lateral corners short and broad; anal cell of forewing usually with short and erect cross-vein; serrulae of lancet usually protruding. The M.sibirica group differs from the latter group and from others in having additionally: posterior corner of metepimeron sub-quadrate, without appendages; abdominal tergum 1 usually with white maculae. The M. sibirica group is represented in China by fifteen previously described species and one new species described here. The collection site of the new species in northern China at Mt. Jiulongchuan in Liaoning Province, is shown in Fig. 1. They can be separated using the following key.