GYNACANTHA.—OPLON ZESCHNA. 195 
Hab. Panama? ? [ Hassler Exped.: 1 3 ].—Cotompia® [Appun: 1 2], Sta. Fé de 
Bogota? [Lindig, 1862: 1 31); Venuzueta? [Appun: 1 3] (MM. C. Z.), Puerto 
Cabello (Appun1); Gutana, Surinam ?; Ecuapor, Rio Bobonaza (Buckley, coll. P. P.C. 
ex coll. McLachlan: 1 3, labelled “Gynacantha membranalis, Ksch.,” in Mcl..’s hand) ; 
Peru, Iquitos (Staudinger, M. C. Z.: 1 2); Braziu?, Amazon ? 3, Pard (Sieber '). 
One of the few species of AXshnine with the wings deeply coloured in any part. 
OPLONZESCHNA. 
Oploneschna, Selys, Bull. Acad. Belg. (8) v. p. 7385 (1883)’; Karsch, Ent. Nachr. xv. p. 238 
(1889) *. 
Hoploneschna, Karsch, Ent. Nachr. xvii. p. 277, 283, 288 (1891) °. 
Only one species is known. 
1. Oploneschna armata, (Tab. VIII. figg. 32, 33.) 
Aischna armata, Hagen, Syn. Neur. N. Amer. p. 124 (1861) *. 
Hoploneschna armata, Needham, Proc. U.S. Nat. Mus. xxvi. t. xxxviii. fig. 1 (venation) (1903) °. 
Two narrow pale green antehumeral stripes—one transverse in front of the antealar sinus, the other longi- 
tudinal-vertical ; or these two united into one stripe which thereby takes the form of an inverted L, 
whose horizontal piece is superior and turned toward the mid-dorsal carina (Omilteme, Purula); or 
united into one cuneiform stripe 1°5 mm. wide (McLachlan’s ¢). This last-named ¢ has the two green 
stripes on the sides of the thorax unusually (2-3 mm.) wide, the usual width being 1 mm. (Arizona) or 
less (Cuernavaca, Omilteme, Guatemala). Stem of the black T-spot on the frons narrower in the northern 
examples (‘5-7 mm. wide at its narrowest point, Arizona), increasing in width southward (1-7 mm., 
Omilteme, Purula). The denticles on the superior anteapical carina of the superior appendages of the 
male 2-5 in number, but apparently not distributed geographically. Dorsal spine on tenth abdominal 
segment longer in the Southern Mexican and Guatemalan males (1 mm.) than in those from Arizona 
(‘6 mm.). 
Discoidal triangle of the front wings 4—6-celled, often asymmetrical in number, of the hind wings 4-celled, 
always with two cells on the proximal side, internal triangle 2-celled on all wings. The anal triangle 
is 4-celled on one wing of one Mexican and on both wings of the Reef male. This last has the pterostigma 
as short as in Cuernavaca examples. 
Abdomen (excl. apps.), ¢ 48°5-53, 2 46; apps., ¢ 5-6, 2?; hind wing, J 45-55, 9 46; costal edge of 
pterostigma, front wing, 2-3 mm. 
Hab. Untirup States, Reef, Cochise Co. (C. R. Biedermann, A. N. S.: 1 3) in Arizona 
(M. C.Z., €. U. lot. 835: 2 3, see footnote, p. 104).—MeExico (U.S. N.M.: 2 3, coll. 
McLachlan: 1 3, labelled “ Aschna armata, Hg.,” in McL.’s hand), Trojes del Oro 
(Saussure, Deppe 1), Cuernavaca (O. W. Barrett, colls. Adams, P.P.C.: 3 3 ), Omilteme, 
8000 feet (H. H. Smith: 2 3), in Guerrero; Guatemaza (coll. P. P. C. ex coll. Selys: 
1 3,1 9), Purula in Vera Paz (Champion: 1 3). 
Taken in July at Omilteme, in October at Cuernavaca, in November at Reef. 
The interesting geographical variations mentioned above will doubtless be connected 
when individuals are collected between Arizona and Cuernavaca. 
Hagen’s unique male ! type is apparently not in the Museum of Comparative Zoology 
at Cambridge. 
