MACROTHEMIS, 291 
Ten females from Teapa taken in January measure : abdomen 24-28 (26-4), hind wing 27°5-31 (29°6) mm. ; five 
from Rio Janeiro give, abdomen 24—27°5 (26), hind wing 28-31°5 (30-1) mm., the numbers in parentheses 
being the respective averages. 
Hab. Mexico, Atoyac [1 ¢] in Vera Cruz, Teapa [17 3, 41 2) in Tabasco 
(H. H. Smith); Guaremana, Cubilguitz (Champion: 1 2), Puerto Barrios [1 ¢ ], Los 
Amates [3 ¢,7 2], Santa Lucia [1 ¢, 8 2 ] (Williamson, Deam, Hine, colls. Wilmsn., 
O. S. U.); Costa Rica, Esparta [1 ¢ ], Surubres near San Mateo [1 ¢, 3 2 ] (Biolley, 
coll. Kahl); Panama, Chiriqui®——Cotompia (Appun®), Bonda in Dept. Magdalena 
(H. H. Smith, Carn. Mus. Pittsb.: 1 9); Venezurta (U. S. N. M.: 1 ¢), Puerto 
Cabello? (Appun®); Ecuapor (coll. Adams: 1 9); Braz}, Bahia?3, Chapada 
[3 9°], Rio Janeiro [2 3,5 2] (H. H. Smith, Carn. Mus. Pittsb.). 
Taken from January to April at Teapa, January to March in Guatemala, January and 
February in Costa Rica, April at Atoyac, August (Bonda), and November (Rio Janeiro). 
Mr. Williamson noted of a female of this species, ‘‘Santa Lucia, Jan. 31, 1905. 
Habits similar to A” [i. e., Brechmorhoga inequiunquis, see page 287]. The Surubres 
examples were taken at “ eau stagnante.” 
The present material comprises three times as many females as males. 
4. Macrothemis inacuta. 
Macrothemis inacuta, Calvert, Proc. Bost. Soc. Nat. Hist. xxviii. pp. 318, 328 (1898)'; Proc. 
Calif. Acad. Sci. (3), Zool. i. p. 895, t. 25. figg. 7, 10 (details $) (1899) *. 
Compared with my detailed description? of this species, the younger males have the vertex and superior 
surface of the frons luteous or olivaceous, anterior surface of frons cream-coloured, hence as in the 
females ; the metallic-blue as described for the male types appears later. As an individual variation 
among the present males, the abdomen may be distinctly wider at segment 2 (2 mm.) than at 3 (1 mm.), 
thence widen to the base of 6 (2 mm.), and again narrow to 10 (1:3 mm.). 
A teneral male from Gualan has the hind wings faintly yellowish from triangle to apex, the front wings still 
paler yellow in the basal half. 
The maximum extent of brownish-yellow at the base of the hind wings of the female is (posterior to the 
postcosta) the distal subbasal sector (A, of C. & N.) out to the level of the triangle and back to the 
hind margin (Teapa, La Venta, Tehuantepec, Zacapa, El Rancho); individuals so coloured usually have 
also the apex of the front wings from the stigma outward pale brown; females with these colours on 
the wings are found at the same localities (Teapa, Gualan) and at the same time as females with almost 
colourless wings. 
The following figures indicate the degree to which a sexual difference is developed in the hind wings of the 
present material (33 $, 18 2). A post-triangular eell reaches across the entire field from the short 
sector to the first sector of the triangle in 56 hind wings ¢ (=85 °/,), 16 hind wings (4 of the 16 
asymmetrical) 9 (=44 °/,), and does not reach across in 10 hind wings (6 of the 10 asymmetrical) ¢ 
(=15 °/,), 20 hind wings 9 (=56 °/,). Only one cell is found between the posterior angle of the 
triangle and A, immediately opposite in 27 hind wings (11 of the 27 asymmetrical) ¢ (=41 °/,), 1 hind 
wing 2 (=2°8 °/,), two cells existing here in 39 hind wings ¢ (=59 °/,), 37 hind wings 9 (=97-2 °/,). 
The variations are not geographical. 
Hab. Mexico, Presidio de Mazatlan (Forrer: 13, 29) and Papachal (Batty, 
A. M. N. H.: 1 3) in Sinaloa, Tepic (Hisen & Vaslit1?, coll. Calif. Acad. Sci.: 1 3 
type), Guadalajara (Schumann: 1 ¢ ), San Lorenzo Cordova (Tryillo: 1 2), Puente 
