Sirthenea, Chłond, 2018

Chłond, Dominik, 2018, A taxonomic revision of the genus Sirthenea (Hemiptera: Heteroptera: Reduviidae) of the Old World, Zootaxa 4520 (1), pp. 1-85 : 29

Key to the Oriental, Palearctic and Oceanian species of Sirthenea

1 Brachypterous females................................................................................. 2

- Macropterous males and females......................................................................... 3

2 Ocelli present ( Fig. 65 )................................................... S. (Sirthenea) dimidiata Horváth, 1911

- Ocelli absent ( Fig. 94 )....................................................................... S. kali sp. nov.

3 Body uniformly dark brown ( Fig. 204 )...................................... S. (Sirthenea) nigronitens ( Miller, 1958)

- Body bicolorous...................................................................................... 4

4 Body black, connexivum pale (whitish) with dark margins ( Fig. 113 )........... S. (Sirthenea) nigra Cai & Tomokuni, 2004

- Body with distinct pale markings on legs and hemelytron...................................................... 5

5 Hemelytron with small pale marking in basal part of hemelytron, not reaching apex of scutellum....................... 6

- Hemelytron with distinct pale markings covering basal half of hemelytron ( Fig. 65 ) or with an additional pale spot in middle part of corium ( Fig. 81 )................................................................................. 8

6 Body length over 17 mm, anterior pronotal lobe with distinct collar, femur unicolorous, tibia unicolorous with pale base.... 7

- Body length under 15.3 mm, anterior pronotal lobe without collar, middle and hind femur bicolorous (basal half pale, apical half dark), hind tibia dark with pale base ( Fig. 103 )................................. S. (Sirthenea) nitida Chłond, 2008

7 Dorsal surface of antennifer corrugated, eyes wider than synthlipsis, posterior margin of an eye U-shaped in lateral view, femur and tibia yellow, body covered by dense, relatively long erect setae ( Fig. 122 )............... S. (Sirthenea) setosa sp. nov.

- Dorsal surface of antennifer smooth, eyes narrower than synthlipsis, posterior margin of an eye S-shaped in lateral view, femur black, tibia black except pale base, vestiture scarce and relatively short ( Fig. 55 )......... S. (Sirthenea) caiana Chłond, 2008

8 Posterior margin of an eye S-shaped in lateral view, metapleura with one complete ridge, spiracles III–IV placed distant from ventral connexival suture ( Fig. 185 ), anerior pronotal lobe distinctly paler (yellow or red) than posterior lobe or entire pronotum dark (dark brown or black), if pronotum dark hemelytron with pale spot on middle part ( Figs. 79–81 ) S. (Sirthenea) flavipes ( Stål, 1855)

- Posterior margin of an eye U-shaped in lateral view, metapleura with two complete ridges, spiracles III–IV placed near of ventral connexival suture, anterior pronotal lobe dark, pale markings on hemelytron reaching half of corium, limited from dark part by irregular margin ( Fig. 65 ).......................................... S. (Sirthenea) dimidiata Horváth, 1911

Figures

FIGURE 55. Sirthenea caiana Chłond, 2008—dorsal habitus. After Chłond (2008b), modified.

FIGURE 65. Sirthenea dimidiata Horváth, 1911—dorsal habitus.

FIGURE 79. Sirthenea flavipes var. apicalis Horváth, 1909—dorsal habitus.

FIGURES 80–81. Coloration of hemelytron: 80.—Sirthenea flavipes (Stål, 1855), 81.—S. flavipes var. apicalis Horváth, 1909.

FIGURE 94. Sirthenea kali sp. nov.—dorsal habitus.

FIGURE 103. Sirthenea nitida Chłond, 2008—dorsal habitus After Chłond (2008a), modified.

FIGURE 113. Sirthenea nigra Cai & Tomokuni, 2004—dorsal habitus.

FIGURE 122. Sirthenea setosa sp. nov.—dorsal habitus.

FIGURES 201–204. Color figures of habitus: 201—Sirthenea flavipes (Stål, 1855); 202—S. flavipes var. apicalis Horváth, 1909; 203—S. kali sp. nov.; 204—S. nigronitens (Miller, 1958).

FIGURES 183–187. 183—Apical part of anterior pronotal lobe of Sirthenea flavipes (Stål, 1855); 184—Apical part of anterior pronotal lobe of S. picescens Reuter, 1887; 185—Spiracles of S. flavipes (Stål, 1855); 186—Spiracles of S. laevicollis Horváth, 1909; 187—Spiracles of S. nitida Chłond, 2008.