Philoctetes, Abeille de Perrin, 1879

Rosa, Paolo, Zilioli, Michele & Jacobs, Maarten, 2017, Notes on endemic Alpine chrysidids, with key to Alpine Philoctetes Abeille de Perrin, 1879, and remarks on two rarely collected species (Hymenoptera, Chrysididae), Natural History Sciences 4 (1), pp. 9-18 : 11

KEY TO THE ALPINE SPECIES OF PHILOCTETES

1- Body entirely blue, green to dark green in both sexes ( Figs. 1-6 ) .................................................................. 2

- Body distinctly bicoloured: head and mesosoma green, green-blue or blue contrasting with red or golden-red T1, T2, and often T3 as well. Male sometimes dorsally darkened, but bicoloured in lateral view ........ 4

2- Metascutellum with large, elongated parallel sided projection ( Figs. 4B , 5B , 6B , 7B,D,F ) ...................... .......................….… Ph. putoni (du Buysson, 1892)

- Metascutellum without projection, sharply angled or slightly protruding ( Figs.1B , 2B , 7A,C, 7 E ) ........…3

3- Body covered with short (up to 1.5 MOD)standing white setae. In lateral view, metascutellum sharply convex; apical median notch on T3 with thick border; posterolateral margins of T3 sinuous ….......................…… ………....………...... Ph. truncatus ( Dahlbom, 1831)

- Body covered with long (up to 2 MOD) standing black setae ( Figs. 1D , 2D ); in lateral view metascutellum slightly protruding ( Figs. 1B , 2B,C , 7C ), and in dorsal view triangularly shaped ( Fig. 7A ); apical median notch on T3 with thin border, posterolateral margins of T3 uniformly arched ( Figs. 1D , 2D ) .............…..…. Ph. helveticus ( Linsenmaier, 1959)

4- T1 and T2 red or golden red, distinctly contrasting with green or light blue T3. T3 margin with a shallow median notch, and uniformly arched laterally. T3 without transverse swelling or thickened rim ….............................. ...................... Ph. bogdanovii ( Radoszkowski, 1877)

-T1,T2,andT3uniformlyredorgoldenred.T3marginwitha deepmediannotch,andsinuouslaterally,orapicalmargin of T3 with transverse swelling and shallow notch ..... 5

5- Margin of T3 with a shallow median notch, transverse swelling, and uniformly arched sides …......... .............................. Ph. punctulatus ( Dahlbom, 1854)

- Margin of T3 with deep median notch, no transverse swelling, and sinuous sides (in male sometimes less evidently so) .......... Ph. bidentulus (Lepeletier, 1806)

Figures

Fig. 1 - Philoctetes helveticus (Linsenmaier), female: A) habitus, dorsal view; B) habitus, lateral view; C) head, frontal view; D) T3, dorso-lateral view.

Fig. 2 - Philoctetes helveticus (Linsenmaier), male:A) habitus, dorsal view; B) habitus, lateral view; C) scutellum and metascutellum, lateral view; D) T3, dorso-lateral view.

Fig. 3 - A) Philoctetes helveticus, female (Photo by M. Jacobs); B) Aosta Valley, Chamolé lake, 2350 m (Photo by C. Monte); C) O. Niehuis looking for P. putoni at Milefonts, 2030 m, Mercantour National Park (Photo by P. Rosa).

Fig. 4 - Philoctetes putoni (du Buysson), female:A) habitus, dorsal view; B) habitus, lateral view; C) head, frontal view; D) T3, dorso- lateral view.

Fig. 5 - Philoctetes putoni (du Buysson), female, holotype:A) habitus, dorsal view; B) habitus, lateral view; D) T3, dorso-lateral view; C) Philoctetes putoni (du Buysson), male: genital capsula.

Fig. 6 - Philoctetes delvarei Tussac & Tussac, male, holotype:A) habitus, dorsal view; B) habitus, lateral view; C) head, frontal view; D) T3, dorso-lateral view.

Fig. 7 - A,C,E) Philoctetes helveticus (Linsenmaier), female: A) mesosoma, dorsal view; C) mesoscutum, propodeum and T1, lateral view; E) T1, dorsal view. B,D,F) Philoctetes putoni (du Buysson), female: B) mesosoma, dorsal view; D) mesoscutum, propodeum and T1, lateral view; F) T1, dorsal view.