Exeristes

Varga, O., 2017, A Review Of The Genus Exeristes (Hymenoptera, Ichneumonidae, Pimplinae) From Carpathians, With An Illustrated Key To Western Palearctic Species, Vestnik Zoologii 51 (1), pp. 9-14 : 11

Key to Western Palaearctic Exeristes species

1. Female fore tarsal claws without basal lobes. Mesosoma partly red. Male hind coxa red and all trochanters yellow ( fig. 3, 3 ). ........................................................................................................... E. ruficollis

– Female fore tarsal claws with basal lobes. Mesosoma usually black, if sometimes partly or entirely red, then the ovipositor tip with a subapical tubercle ( fig. 2 , 1 , 3 ). Male hind coxa and trochanters variable. If all male trochanters yellow, then hind coxa black. ......................................................................................... 2

2. Female metasomal tergites strongly transverse ( fig. 2 , 10). Ovipositor tip with a subapical tubercle and female fore tarsal claws simple (not emarginated apically). Male clypeus with an apical tubercle ( fig. 3 , 4). All male coxae usually black, trochanters red. ....................................................................... E. roborator

– Female metasomal tergites subquadrate or elongated. Ovipositor tip without a subapical tubercle or female fore tarsal claws emarginated apically. Male clypeus without an apical tubercle. Male coxae and trochanters variable. ........................................................................................................................................... 3

3. Tarsomere 5 of hind tarsus about 1.2 times longer than tarsomere 2 ( fig. 3 , 5). Ovipositor tip with a subapical tubercle ( fig. 2 , 3 ). Female fore tarsal claws emarginated apically ( fig. 1 , 6). Male scape, pedicel and all coxae black; all trochanters red ( fig. 3 , 1 ). ....................................................................... E. arundinis

– Tarsomere 5 of hind tarsus shorter than tarsomere 2 ( fig. 3 , 2 ). Ovipositor tip without a subapical tubercle ( fig. 2, 2 ). Female fore tarsal claws simple. Male scape, pedicel, fore and middle coxae, and all trochanters yellow; hind coxa black ( fig. 3 , 2 ). ............................................................................. E. longiseta

Figures

Fig. 3. Exeristes spp., male. 1 — E. arundinis, habitus (lateral view); 2 — E. longiseta, habitus (lateral view); 3 — E. ruficollis, head and mesosoma (lateral view); 4 — E. roborator, clypeus (frontal view); 5 — E. arundinis, hind tarsus (lateral view); 6 — E. roborator, hind tarsus (lateral view).

Fig. 2. Exeristes spp., female. 1 — E. roborator, ovipositor tip (lateral view); 2 — E. longiseta, ovipositor tip (lateral view); 3 — E. arundinis, ovipositor tip (lateral view); 4 — E. denticulator, holotype, ovipositor tip (lateral view); 5 — E. ruficollis, lectotype, ovipositor tip (lateral view); 6 — E. arundinis, fore tarsal claw (lateral view); 7 — E. ruficollis, lectotype, hind femur and tibia (lateral view); 8 — E. denticulator, holotype, hind tibia and tarsus (lateral view); 9 — E. denticulator, holotype, propodeum and tergites I–II of metasoma (dorsal view); 10 — E. roborator, propodeum and tergites I–II of metasoma (dorsal view).

Fig. 1. The Carpathian Exeristes spp. distribution map. Yellow circle — E. roborator; red circle — E. longiseta; green circle — E. arundinis.