Aeshna williamsoniana Calvert 1905

Aeshna (Hesperaeschna) williamsoniana
Tables 1, 3, 4, 6, 9, 12, 14; Pis. XXXVIII, figs. 513, 514, XXXIX, XLVI,
figs. 604, 605 ; Map 2. 1905. Aeshna ivilliamsoniana Calvert, Biol. Centr.-Amer. Neur., pp.180, 185,
tab. VIII, figs. 13, 14 (apps. $ ), 19 (top of frons $). 1 1909. Aeschna williamsoniana Martin, Coll. Zool. Selys-Longchamps Cat.
Syst. Descr. fasc. XVI IT, p. 57, fig. 53 (apps. 2), pp. 81, 84. 2
Material studied. — Mexico : Cuernavaca, Morelos, July 8, C. C. Deam, 1 S holotype. Panama: Chiriqui Mts., Boquete, 5000 feet, March 28, 1923, F. M. ( iaige, 1 9, no. 304, "Aeshna williamsoniana Calv. (let L. K. G[loyd] 1937". Both $ and $ in Mus. Zool. Univ. Mich. Total 1 $, 1 9.
Distribution. — Mexico, 1 Panama.'
Altitudinal Range. — Both localities cited above are at 1525 meters = 5000 feet elevation.
$ . Face : anterior surface of frons anil rhinarium dark brown, of nasus blue ; frons with no dark T-spot above but with a small indistinct green spot on each side of the dorsal surface, carina separating the anterior from the dorsal surface, viewed from above, shows a marked median anterior curve.*

Aeshna williamsoniana, Williamson's darner, is a species of dragonfly in the family Aeshnidae. It is found in Belize, Costa Rica, Guatemala, Mexico, Panama, and possibly Honduras. Its natural habitats are subtropical or tropical moist montane forests and rivers. It is threatened by habitat loss.