Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 79. (Budapest 1987)

Altenhofer, E. ; Zombori, L.: The species of Heterarthrus Stephens, 1835 feeding on maple (Hymenoptera, Tenthredinidae)

peus divided by a transverse furrow in lower one-third, anterior margin truncate. Anterior tentorial pits large, though not conspicuously, since they are almost hidden below antennái articualtion. Interantennal area almost flat, only somewhat convex, entirely black. Superior tentorial pits elongate, inconspicuously sitting in frontal suture. Frontal area weakly elevated, not delimited by keels. Frons peculiarly divided in the middle by a cuneate depression, broad just below median ocellus, downwards converging and almost meeting at mid-line of frons, from here on a bare, highly polished surface streak continues downwards appearing to be a channel of the cuneate depression. Postocellar area short, about 1.5 times the diameter of an ocellus, delimited on either side by a large, though not too deep, round pit. Head behind eyes strongly constricted. Antenna black, but apical five joints weakly reddish below. The number of joints 12, sometimes 11 (mostly in males). Thorax black with the following parts whitish: extreme lateral corner of pronotum, distal half of tegula. Cenchri white. The acrotergite of mesonotum separated by an almost imperceptible transverse line. Anterior and lateral lobes of mesoscutum with very fine coriaceous sculpture. Mesoscutellum smooth and polished with some scattered hairs, mesothoracic postscutellum sloping behind, highly polished (paratype). Mesopleuron with silvery pubescence, mesosternum bare and shining. Legs black, but anterior sides of fore femora and of all tibiae dirty white, apices of middle and hind femora also white. Coxae and trochanters partly white. All tarsi black. Wings strongly infuscate, veins and pterostigma black. Second anal cross-vein regularly arcuated and adjoins first discoidal cell in the middle. Abdomen black, shining with some transverse corrugations. Hypopygium very characteristic as shown in Fig. 4. Sawsheath in lateral view resembles a knife-blade, somewhat broad in dorsal view, but blunt at apex. Bilateral bristles are brown, short and point outwards, rather than backwards. A portion of the saw, showing the construction of the teeth, depicted in Fig. 7. Length: 4.5 mm. — Alar expanse: 10 mm. M a 1 e. — Black and yellowish white. Head strongly contracted behind eyes. In the main features it is highly similar to the female, but more richly coloured with yellowish white : labrum, clypeus malar space, inner orbit (up to about two-thirds of the eye), a U-shaped mark on interantennal area« Fig. 17. The mine of Heterarthrushealyi

'nom. n. larva in the leaf of Acer campestre. -Fig. 18. The mine of //. cuneifrons sp. n. larva in the leaf of A. pseudoplatanus