Favoritos de symphyta

Male. Specimen checked. Males of the Hemichroa species are rarely seen, these sawflies are apparently parthenogenetic. According to Benson, 1958, and Smith, 1975, this one is australis, with antennae reddish below and pterostigma piceous instead of brown or black.

Several males and females copulating on Helleborus foetidus, and I saw a female lay eggs on this plant.

Altitude : 1090m

I have collected 2 specimens (male and female) different from the specimens on the pictures.

Collected male : ~6mm
Collected female : ~7mm

Could be B. cinereipes or B. alpina.

In the key in Lacourt's book, Helleborus foetidus is not referenced as host plant for this two species (Myosotis scorpioides for B. cinereipes and unkwon for B. alpina) and imagos are expected from April to June for the first generation of B. cinereipes and unknown for B. alpina.