PERITHEMIS, 311 
the nodus and connected anteriorly with the other band which lies 
at the triangle . 2 6. 1 ee ee ee ee ew ee 6 «Form mooma. 
BBBB. Wings of the female with two transverse brown bands, the distal 
band having its proximal edge at the nodus or more remote and not 
connected with the other band . . ~~...» «© « « « « Form #enera. 
Of especial importance is the fact that intermediates exist connecting these forms with each other 
as set forth below. 
The males corresponding in venation to, and occurring in the same localities as, the 
females above described, all have the wings almost uniformly amber or yellow; even in 
the same locality they vary as to the presence or absence of a distinctly darker spot or 
dot at the distal angle of the discoidal triangle. No structural details other than the 
venation have been found to differ in the various males. As may be seen from an 
inspection of the above synopsis, no means are known whereby a “ domitia type ” male 
may be distinguished from an iris male, or a mooma male from a tenera male. In the 
following lists the males are grouped with females, according to locality. 
a. Form intensa. (Tab. VI. figg. 10-18.) 
Perithemis intensa, Kirby, Trans. Zool. Soc. Lond. xii. p. 326, t. 51. fig. 7 (3 col.) (1889). 
Perithemis intensa, var. californica, Martin, Bull. Mus. Hist. Nat. Paris, 1900, p. 104 *. 
Perithemis domitia, Calvert, 1. c.’ (Tepic examples). 
g. A clearer, but not altogether colourless, area between the nodus and the triangle exists in not a few of 
the present material (Arizona, Presidio de Magatlan, Amula, Guadalajara), as has been described by 
Ris® for examples from Buenos Aires. This clearer area may or may not be accompanied by a dark 
spot at the distal angle of the discoidal triangle, even in the same locality (Amula), The Yucatan 
males have more uniformly amber-coloured wings, without this spot or the clearer area. 
Q. The range of variation in the markings of the wings of the female is well shown on our plate. 
Dimensions :— 
Florence, Ariz. Tepic 5. Guadalajara. Amula. Temax. 
Abdomen, ¢ ...++--- 15-16 13-155 16°5-18 15-18 13-15°5 mm. 
” Dec eeeee wees 15 16-18 ’ 16 wees gg 
Hind wing, d....«-.- 20-22 18-21 21-5-23 19-22'5 18-21 ,, 
” a eee 20 22°5-25'5 21-22°5 wees 99 
Hab. Unirep States, Florence (Biederman, A. N. S.: 10 ¢), Salt River [1 ¢ ] and 
Catalina Mts. [1 ¢ ] (Oslar, coll. Wilmsn.) in Arizona; LOWER CatiFornia (Diguet §).— 
Mexico, Fuente (coll. P. P. C. ex coll. Mengel: 43,29), Mazatlan (Crotch, M. C.Z.: 
1¢), Presidio de Mazatlan (Forrer: 3 ¢ ), Sierra Madre (Richardson: 1 ¢ ) of Tepic , 
Guadalajara (Schumann: 3 3,5 2) [McClendon, Tower: 1 3, 8 2] and Zopopan 
(Tower: 12 | (voll. P. P. C.) in Jalisco, Sochitepec (H. H. Smith: 1 3 ), Cuernavaca 
[14], Iguala (5 6 | (Barrett, coll. P. P. C.) and Puente de Ixtla (coll. Deam: 5 3) in 
Morelos, Amula [196,59] and Savana Grande [2 ¢ | (Z. H. Smith) in Guerrero, 
Temax [9 ¢ ], Valladolid [1 ¢ ] (Gauwmer) and Tabi (F. D. G.: 56) in Yucatan. 
2s2 
