PANTALA,.—PERITHEMIS. 309 
2. Pantala hymenza. 
Libellula hymenea, Say, Journ. Acad. Nat. Sci. Philad. viii. p. 18 (1839) *. 
Pantala hymenea, Hagen, Syn. Neur. N. Amer. p. 142 (1861)*; Stett. ent. Zeit. xxviii. p. 217 
(1867) °; Proc. Bost. Soc. Nat. Hist. xviii. p. 64 (1875)*; Walsh, Proc. Acad. Nat. Sci. 
Philad. 1862, p. 400°; McLachlan, Ent. Monthly Mag. xi. p. 92 (1874)*; Proc. Zool. Soc. 
Lond. 1877, p. 84"; Calvert, Trans. Amer. Ent. Soc. xx. p. 254 (1893) °; Proc. Calif. Acad. Sci. 
(2) iv. p. 512, t. 17. fige. 90-91 (details gf) (1895)°; Banks, Ent. News, v. p. 179 (1894) *°; 
Kellicott, Journ. Cincin. Soc. Nat. Hist. xviii. p. 109 (1896) "; xix. p. 70 (1897)  ; Odon. 
Ohio, p. 93 (1899) *; Williamson, 24th Rep. Geol. Indiana, p. 815 (1900)**; Dury, Journ. 
Cincin. Soc. Nat. Hist. xix. p. 169 (1900) *; Howard, Insect Book, t. 42. fig. 4 (entire 
insect) (1901) * ; Currie, Proc. Wash. Acad. Sci. iii. p. 885 (1901) "7; Proc. Ent. Soe. Wash. 
v. p. 803 (1903) *. 
Pantalia hymenea, Laurent, Ent. News, viii. p. 208 (1897) ®. 
The same venational variations occur in this species that have been mentioned on page 307 for P. flavescens, 
but equally without reference to any particular locality. I have been unable to find any constant 
difference between examples from the United States and those from Ecuador. 
Hab. Unttep States, Sea Isle City 19 in New Jersey, Philadelphia 8 [1 ¢ ], Ohio 11-13 5, 
Indiana !, Havana [ Adams: 1 ¢ ] in Mlinois 5, Volga [Zruman: 1 2 ] (coll. P. P. C.) in 
South Dakota’, Kansas 1°, Esperanza Ranch near Brownsville (Schaeffer, Brookt. 
Inst.: 1 2) and Pecos River? in Texas (4. VW. S.: 1 ¢,1 2), Las Cruces (Cockerell, 
coll. P. P.C.: 13) in New Mexico 8, Florence (Biederman, A. N. S.: 22), Ehrenburg 
(Brookl. Inst.: 138) and Hot Springs (Schwarz & Barber 8) in Arizona; Lower 
Catirornia, Corral de Piedras ®, Mesa Verde 9, Miraflores®, San José del Cabo 9.— 
Mexico, Matamoros”, Mazatlan * (Crotch, M. C. Z.), Rio Papagaio [1 9° ] and Acapulco 
[1 ¢ | in Guerrero (H. H. Smith); Honpuras (coll. McLachlan: 13 ).—Couomsia, 
Bonda in Dept. Magdalena (HZ. H. Smith, Carn. Mus. Pitisb.: 16); Ecuapor, Posorja 
[22], Santa Elena [4,12 ], Guayaquil [1 2 ] (Campos R., A. NV. S.); Perv, Payta ®; 
Cute’; West Inpigs, Cardenas? in Cuba; Gauapacgos’, Charles I. (U. S. 
N. M.: 12). 
The dated specimens from the United States, Lower California, Mexico, Cuba, and 
the Galapagos were taken between June and October. Of those from other countries 
I have no information. 
PERITHEMIS. 
Perithemis, Hagen, Syn. Neur. N. Amer. p. 185 (1861)*; Brauer, Verh. zool.-bot. Ges. Wien, 
XVill. pp. 365, 718 (1868) *; Kirby, Trans. Zool. Soc. Lond. xii. pp. 259, 262, 273 (1889) ° ; 
Cat. Odon. p. 10 (1890) *; Calvert, Trans. Amer. Ent. Soc. xx. p. 224 (1893) °; Kellicott, 
Odon. Ohio, p. 92 (1899) *; Williamson, 24th Rept. Geol. Indiana, p. 250 (1900)7; Needham 
& Betten, Bull. 47 N. Y. St. Mus. pp. 506, 508 (1901) ° *. 
* A character given for this genus by Mr. Williamson’ (“triangle of front wing free”), as well as one 
employed by Prof. Needham * (“subtriangle without cross-veins”), applies only to the local forms of the 
fauns treated by these authors. 
BIOL. CENTR.-AMER., Neuropt., February 1907. as 
