Arvelius, SPINOLA, 1840

Ortega-León, G. & Chávez-Bermeo, N., 2008, A New Species of the Genus Arvelius Spinola (Hemiptera: Heteroptera: Pentatomidae: Pentatomini) from Mexico, Proceedings of the Entomological Society of Washington 110 (3), pp. 643-646 : 645-646

KEY TO THE SPECIES OF ARVELIUS SPINOLA FROM MEXICO

1. Paramere F -shaped, lateral margins of pygophore lobulate ( Figs. 4–5, 9–10 ).... 2 – Paramere beak-shaped or not, lateral margins of pygophore lobulate or not ( Figs. 2– 3,6–8,11 ) ....................... 3

2. External margin of antennal segment II and basal half of III marked with a continuous dark brown or reddish line; each paramere with a conspicuous elevation on external margin ( Fig. 10 ).. A. tecpanus (Brailovsky) – External margin of antennal segment II and basal half of III unmarked; each paramere without a conspicuous elevation on external margin ( Fig. 9 )............................. A. albopunctatus (De Geer)

3. Suture between each jugum and tylus orange or pale yellow............................ A. porrectispinus Breddin – Suture between each jugum and tylus dark brown.......................... 4

4. Rostrum reaching abdominal sternite IV; pygophore with dorsal margin concave lateral margins straight, ventral margin slightly irregular ( Fig. 6 )......................... A. tuxtlaensis Brailovsky – Rostrum reaching to or slightly surpassing abdominal sternite VI; pygophore with dorsal margin nearly straight, lateral margins lobulate on middle third, ventral margin with four lobes ( Fig. 2 ).......................... A. thomasii , n. sp.

Figures

Figs. 1–11. 1, Arvelius thomasi, head and pronotum. 2–6, Pygophore. 2, A. thomasi. 3, A. porrectispinus. 4, A. albopunctatus. 5, A. tecpanus. 6, A. tuxtlaensis. 7–11, Paramere, 7, A. thomasi. 8, A. Porrectispinus. 9, A. albopunctatus. 10, A. tecpanus. 11, A. tuxtlaensis.