Amnestus, DALLAS

Martinez, Cristina Mayorga & Peredo, Luis Cervantes, 2005, DESCRIPTION OF SIX NEW SPECIES OF AMNESTUS DALLAS (HEMIPTERA-HETEROPTERA: CYDNIDAE) FROM MEXICO, Journal of the New York Entomological Society 113, No. 3 - 4, pp. 159-173 : 171-172

KEY TO THE MEXICAN SPECIES OF AMNESTUS

1. Jugum with 5 marginal spines ( Fig. 1 C )....................................... 2 1' Jugum with 4 marginal spines ( Fig. 1 A, 1 B,1 C, 1 E, 1 F )........................... 3

2. Tylus longer than jugum, usually as long as wide; prosternal carina longer than high........................................................... A. uhleri Distant 2' Tylus just slightly longer than jugum; prosternal carina higher than long.... A. obscurus n. sp.

3. Fore tibia flattened, with 6 spines on external margin ( Fig. 5 C )........... A. carinatus n. sp. 3' Fore tibia flattened, with 5 spines on external margin ( Figs. 5 A, 5 B, 5 E, 5 F )............. 4

4. Male fore tibia without subasal ventral spine.......................... A. pusio (Stål) 4' Male fore tibia with a subasal ventral spine.................................... 5

5. Fore femur with a bifid spine on posterior mesial area of ventral surface.......................................................... A. ficus Mayorga & Cervantes 5' Fore femur without bifid spine............................................. 6

6. Rostral segment II covered by prosternal carina, with margin strongly elevated anteriorly, but straight posteriorly ( Fig. 2 E ).................................... A. rugosus n. sp. 6' Rostral segment II not covered by prosternal carina, with margin slightly concave mesially ( Fig. 2 A, 2 B, 2 F )...................................................... 7

7. Fore tibia flattened, external margin with mesial area of internal margin angulated ( Fig. 5 F )................................................ A. sinuosus n. sp. 7' Fore tibia flattened, external margin not angulated ( Figs 5 A, B )...................... 8

8. Male ventral subapical spine of hind femur 1/3 the length of tibia.......... A. pusillus Uhler 8' Male ventral subapical spine of hind femur shorter............................... 9

9. Tylus convex, transverse impressions present, except on apical lobe...... A brailovskyi n. sp. 9' Tylus without transverse impressions........................................ 10

10. Pronotum with transverse impression delimited by a series of setigerous punctures ( Fig. 1 B ).................................................... A. calakmulensis n. sp. 10' Pronotum with transverse impression just slightly marked, without series of punctures...... 11

11. Lateral margin of pronotum slightly concave on basal fourth; corium brown on apical third..................................................... A. brunneus Signoret 11' Lateral margin of pronotum straight on basal fourth; corium pale yellow... A. pallidus Zimmer

Figures

Fig. 1. Dorsal views of adults of Amnestus species. A. A. brailovskyi new species; B. A. calakmulensis new species; C. A. carinatus new species; D. A. obscurus new species; E. A. rugosus new species; F. A. sinuosus new species. (scale = 1 mm).

Fig. 5. Male fore femora of Amnestus species. A. A. brailovskyi new species; B. A. calakmulensis new species; C. A. carinatus new species; D. A. obscurus new species; E. A. rugosus new species; F. A. sinuosus new species. (scale = 1 mm).

Fig. 2. Lateral view head in Amnestus species, showing prosternal carina. A. A. brailovskyi new species; B. A. calakmulensis new species; C. A. carinatus new species; D. A. obscurus new species; E. A. rugosus new species; F. A. sinuosus new species. (scale = 1 mm).