Archilestes, Garrison, 1982

Garrison, R. W., 1982, Archilestes neblina, a new damselfly from Costa Rica, with comments on the variability of A. latialatus Donnelly (Odonata: Lestidae), Occasional Papers of the Museum of Zoology, University of Michigan 702, pp. 1-12 : 8-9

The following key should allow separation of males of Archilestes :

1. Marginal cell posterior to subtriangle in hindwing enlarged at border so that anal border of wing is strongly convex ( Williamson 1921, Fig. 1; Donnelly 1981, Figs. 3, 5). Broadening ratio (length of distal vein of marginal cell posterior to subtriangle in hind wing relative to that of forewing) 1.23 or more (subgenus Cyptolestes ) ................................... 2

1'. Marginal cell posterior to subquadrangle in hind wing not greatly enlarged at border, anal border of wing gently convex ( Williamson 1921, Fig. 2); broadening ratio 1.20 or less (subgenus Archilestes s.s.) ...... 3

2(1). T i p of superior appendage blunt, truncate ( Fig. 11 ; Williamson 1921); Rg arising from R p before third postnodal crossvein in forewing; states of Aragua and Carabobo, Northern Venezuela ......... tuberalatus

2'. T i p of superior appendage acute ( Figs. 22-24 ); R3 arising from R2 at or, more often, beyond third postnodal crossvein in forewing; southern Mexico to Costa Rica.................................. latialatus

3(1'). Vein Rg arising from R2 beyond second postnodal crossvein in both fore- and hind wings .......... 4

3'. Vein Rg arising at or before second postnodal crossvein in both wings ................................. 5

4(3). Vein Rg arising at or before fourth postnodal crossvein in both wings; pterothorax largely pale with no metallic green stripes; Southern Brazil, Northern Argentina ........................................ exoletus

4'. Vein Rg arising from R2before fourth postnodal crossvein in both wings; pterothorax with broad stripe of metallic green on mesepimeron and mesepisternum ( Gloyd 1944, Fig. 1); Northeastern Mexico.. regalis

5(3). Posterior half of superior appendages greatly expanded, truncate and leaf-like in appearance (Figs. 7, 9); large species, abdomen excluding appendages 55 mm, hind wing 42 mm; Costa Rica ................. neblina

5'. Posterior half of superior appendages linear, similar in width to basal half of appendages (Pritchard and Smith" 1956, Fig. 4.62); smaller species, abdomen excluding appendages less than 50 mm, hind wing less than 40 mm ................................... 6

6(5). Inferior a b d o m i n a l appendages parallel-sided (Pritchard and Smith 1956, Fig. 4.62), mesepimeral stripe never metallic; Washington, Oregon, California, Baja California ....................... californica

6'. Inferior abdominal appendages divergent, not parallelsided (Pritchard and Smith 1956, Fig. 4.62); dark mesepimeral stripe often metallic green; United States south to Colombia and Venezuela......... grandis

Figures

Figures 10-24. Male structures of Archilestes: 10-21, ventral and latel-alvlews of penes; 22-24, dorsal views of male abdominal appendages; 10-1 1,Archtlrstrs cali/ornzca, male. California: Solano Co.; 12-13, A. grandis, male. Venezuela: Miranda State; 14-15, A. latialatus, male. Mexico: Veracruz; 16-17, A, tuberalatus, male. T'enezuela: Aragua State; 18-19, A. exoletus, male. Argentina: Misiones Province; 20-21, A. rrgalis, male. Mexico: San Luis Potosi; 22, A. latialatus, paratype. Guatemala: Alta T'erapaz Province; 23, A. latialatus. Mexico: Veracruz; 24, A. latialatus. Costa Rica: Alajuela Province.