Lathyrus tuberosus, St. Pietersberg
front and rear spiraculum, lateral
left: mandible; right: rear spiraculum, lateral
Pictures of dead, half dried larvae. The rear spiraculum, with relatively few, elongated papillae is characteristic. Because the larvae were copmpletely flattened their number could not be counted precisely. It certainly is larger than the 5-6 that de Meijere observed in material from Roumania, or the 7-9 in larvae from Lorraine. De Meijere placed the larvae privisionally in the genus Liriomyza, probably because of the shape of the mandibles, with the anterior tooth clearly larger than the posterior one.
The rear spiraculum excludes an identification of these larvae as Phytomyza subtilis Spencer, describedf from North America (that species has about 20 “very small” papillae). The shape of the mine at the other hand excludes another North American Lathyrus miner, Liriomyza fricki Spencer (Spencer, 1986a).