Stachys sylvatica, France, Isère, Rhône-Alpes, Blandin © Arnold Grosscurt

opened gall with larvae

Stachys sylvatica, Belgium, prov. Namur, Viroinval, Oignies-sur-Thiérache, RaveL: the larva is white – larva still young, or inquiline? © Stéphane Claerebout

gall

Groups of larvae in the upwards rolled, discoloured and somewhat swollen leaf margins, and in the swollen, yellowish of reddish flowers buds and disfigured flowers. Bivoltine. The larvae of the summer generation pupate in the gall, those of the winter generation in the soil.
While describing granulata Kieffer writes about the spatula: yellow, lobes obtuse, a bit longer than wide, incision subtriangular, obtuse.

host plants

Lamiaceae, monophagous

Stachys alpina, palustris, recta, sylvatica.

synonyms

Cecidomyia, Perrisia, stachyidis; Perrisia granulata Kieffer, 1909.

references

Béguinot (2003b, 2005a, 20006b, 2007b), Buhr (1965a), Burton, Carbonnelle, Ellis & Schneider (2019a), Dauphin & Aniotsbehere (1997a), Docters van Leeuwen (1936a), Gagné (2010a), Gagné & Jaschhof (2014a), Houard (1909a), Kieffer (1891a, 1909a), Koops (2013a), Lambinon, Schneider & Feitz (2001b), Redfern & Shirley (2011a), Roskam (2009a), Roskam & Carbonnelle (2015a), Simova-Tošić & Skuhravá (2001a), Simova-Tošić, Skuhravá & Skuhravý (1996a, 2000a, 2007a), Skuhravá & Skuhravý (1994a, 1997a, 1999a,b), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý, Dončev & Dimitrova (1991a, 1992a), Skuhravá, Skuhravý & Jørgensen (2006a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý & Neacsu (1972a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a), Stănescu (2009a), Tomasi (2014a).