Homilia leucophaea (Rambur, 1842)

Forcellini, Maxence, Statzner, Bernhard & Tachet, Henri, 2013, A revised description of the larva of Homilia leucophaea (Rambur 1842) (Trichoptera: Leptoceridae) and comparisons with the known western European Athripsodes larvae, Zootaxa 3682 (1), pp. 191-199 : 197

Key to last instar larvae of H. leucophaea and the six Athripsodes species of France

1 Dorsal head surface with many dark round or oval spots (muscle scars) ( Figs 10, 12, 14, 16 ).......................... 2

- Dorsal head surface either without dark round or oval spots or with ill-defined dark spots ( Figs 1 , 8, 18 )................. 5

2 Ventral apotome pale, except near its anterior margin ( Figs 11, 15 )............................................... 3

- Ventral apotome dark ( Figs 13, 17 )....................................................................... 4

3 Two posteromedian (sa 2) setae on metanotum ( Fig. 28 ).............................................. A. aterrimus

- Four posteromedian (sa 2) setae on metanotum ( Fig. 29 )................................................ A. braueri

4 Posterior apex of ventral apotome clearly pointed ( Fig. 13 )............................................ A. bilineatus

- Posterior apex of ventral apotome rounded ( Fig. 17 )................................................. A. cinereus

5 Ventral apotome dark, with rounded posterior apex ( Fig. 9 )........................................... A. albifrons

- Ventral apotome pale, with rounded or acute posterior apex ( Figs 2 , 19 ).......................................... 6

6 Prothoracic tibiae each with apical spur, but no additional spurs on ventral margin (e.g., Fig. 31 ); ventral apotome with rounded posterior apex ( Fig. 19 )...................................................................... A. commutatus

- Prothoracic tibiae each with one short spur on ventral margin in addition to apical spur ( Fig. 6 ); ventral apotome with acute posterior apex ( Fig. 2 )...................................................................... H. leucophaea

Figures

FIGURES 8–19. Heads of Athripsodes spp. larvae, instar V, dorsal and ventral views, respectively. (8 & 9) Athripsodes albifrons; (10 & 11) A. aterrimus; (12 & 13) A. bilineatus; (14 & 15) A. braueri; (16 & 17) A. cinereus; (18 & 19) A. commutatus.

FIGURES 1–7. Homilia leucophaea, larval instar V and its case. (1) Head, dorsal view; (2) head, ventral view; (3) labrum, dorsal view, the arrow indicating the anteromedian pit P1; (4) mesonotum; (5) metanotum, the arrows indicating the four posteromedian (sa2) setae; (6) tibia of left prothoracic leg, interior view, the arrow indicating the additional short, pointed spur on the ventral edge of the tibia; (7) larval case, left lateral view.

FIGURES 27–30. Metanota of Athripsodes spp. larvae, instar V, dorsal views. (27) A. albifrons; (28) A. aterrimus; (29) A. bilineatus, A. cinereus, A. braueri; (30) A. commutatus.

FIGURES 31–34. Left prothoracic legs of Athripsodes spp. larvae, instar V, interior views. (31) A. albifrons; (32) A. aterrimus; (33) A. braueri, the arrows indicating short, pointed spurs; (34) A. cinereus, the arrows indicating short, pointed spurs.