Alloeorhynchus, Fieber, 1860

Brailovsky, Harry & Barrera, Ernesto, 2017, A review of the Mexican species of Alloeorhynchus Fieber (Hemiptera: Heteroptera: Nabidae: Prostemmatinae) with description of six new species, new distributional records, and key to the species, Zootaxa 4338 (2), pp. 305-318 : 306-307

Key to the species of Alloeorhynchus known from Mexico

1 Anterior lobe of pronotum shiny yellow or yellowish orange, or golden orange..................................... 2

- Anterior lobe of pronotum shiny black or shiny reddish brown or pale brownish castaneous........................... 9

2 Connexival segments II–V shiny yellow with a group of black spinules resembling an elongate spot.................... 3

- Connexival segments entirely shiny yellow................................................................. 6

3 Clavus shiny yellow with punctures and apical third shiny castaneous; corium yellow with apical third shiny pale castaneous ( Figs. 4 , 19–20 ).......................................................................... A. macer sp. nov.

- Clavus and corium mostly black to reddish brown............................................................ 4

4 Posterior lobe of pronotum shiny yellowish orange to reddish orange with three black marks, one at each posterior angle and along lateral edge and a triangular-shaped one at base of midline ( Figs. 2–3 , 17–18 ).................. A. trimacula (Stein)

- Posterior lobe of pronotum not distinctly trimaculate.......................................................... 5

5 Posterior lobe of pronotum shiny yellowish orange except for a black semilunar area medially on posterior margin, almost touching the posterior border of anterior lobe; collar shiny yellow or yellowish orange ( Figs. 6–7 , 11–12 )................................................................................................... A. nigrofasciatus Harris

- Posterior lobe of pronotum shiny black to reddish brown except for wide yellowish orange triangular mark lateral to middle line; collar shiny reddish brown ( Fig. 10 ).................................................. A. vergrandis sp. nov.

6 Prothorax including the acetabulae shiny yellow; lateral margin of anterior lobe of pronotum shiny yellow............... 7

- Prothorax shiny black to reddish brown with acetabulae yellow; lateral margin of anterior lobe of pronotum shiny pale castaneous to reddish brown or black............................................................................ 8

7 Posterior lobe of pronotum shiny yellow with posterior border and lateral borders of humeri shiny reddish brown.............................................................................................. A. bellatulus sp. nov.

- Posterior lobe of pronotum shiny reddish brown ( Figs. 9 , 13–14 )............................... .. A. nigrolobus Barber

8 Head dorsal and ventrally shiny black to reddish brown; posterior lobe of pronotum shiny reddish brown ( Figs. 21–22 )........................................................................................... A. epigaeus sp. nov.

- Head dorsally shiny castaneous to golden orange with apical third yellow; head ventrally shiny yellow; anterior and posterior lobe of pronotum pale golden orange with lateral edge and humeri black ( Figs. 1 , 15–16 )............... A. aureus sp. nov.

9 Corium yellow with apical third reddish brown; legs yellow; apex of scutellum reddish brown; antennal segment IV pale castaneous to pale castaneous orange ( Fig. 8 )...................................................... A. moritzii (Stein)

- Corium brownish castaneous; legs dark castaneous (tarsi pale castaneous); apex of scutellum yellow; antennal segment IV yellowish white with basal third and apex brown ( Fig. 5 )........................................ A. convolutus sp. nov.

Figures

FIGURES 1 – 10. Dorsal view of Alloeorhynchus spp. 1, A. aureus sp. nov. (female). 2 – 3, A. trimacula (Stein) (males). 4, A. macer sp. nov. (female). 5, A. convolutus sp. nov. (female). 6 – 7, A. nigrofasciatus Harris (6, female, 7, male). 8, A. moritzii (Stein) (female). 9, A. nigrolobus Barber (female). 10, A. vergrandis sp. nov. (male).

FIGURES 11 – 22. Parameres of Alloeorhynchus spp. 11 – 12, A. nigrofasciatus Harris. 13 – 14, A. nigrolobus Barber. 15 – 16, A. aureus sp. nov. 17 – 18, A. trimacula (Stein). 19 – 20, A. macer sp. nov. 21 – 22, A. epigaeus sp. nov.