ERYTHRODIPLAX. 261 
P. Barrios, S. Tomas), March (Sepacuite, P. Barrios), April (Teapa, Livingston), May 
(Atoyac), and June (Orizaba). 
Connecting-forms with e occur among the examples taken at Teapa in February, 
from Livingston and Gualan; the male from Caché is intermediate between b and a 
in the extent of its wing-colouring. Not infrequently the ochraceous on the hind wing 
stops at the first antecubital, but reaches beyond the submedian cross-vein. 
A male from San Gerénimo, in addition to those listed above, is an example of the 
‘“‘ mixed-fronted ” forms mentioned on page 259; metallic-blue is apparent on the upper 
surface of its frons, which is reddish inferiorly. It therefore furnishes a connecting-link 
with d! (dasifusca). In other respects it falls strictly under d; abdominal segments 
1 and 2 are reddish, 3-7 strongly pruinose, 8-10 black. There is no indication that 
the head of this specimen has been detached from the body. 
e and intermediates between d ande. (Tab. IX. fig. 41.) 
Libellula fusca, Rambur, Névr. p. 78 (1842)'. 
Diplax fusca, Hagen, Syn. Neur. N. Amer. p. 318 (1861) *. 
Erythrodiplax fusca, Brauer, Verh. zool.-bot. Ges. Wien, xviii. p. 723 (1868)°; Ris, Hamburg. 
Magalh. Sammelr., Odon. p. 38 (1904) *. 
Trithemis fusca, Kirby, Cat. Odon. p. 20 (1890) °; Martin, Boll. Mus. Zool. Anat. Comp. Torino, 
Xi. no. 239, p. 2 (1896) °; Calvert, An. Mus. Nac. Buen. Aires, vii. p. 30 (1899) ”. 
? Libellula famula, Erichs. in Schomburgk’s Reis. Brit.-Guiana, iii. p. 584 (1848) *. 
? Trithemis pulla, Kirby, Ann. & Mag. Nat. Hist. (7) ii. p. 363 (1899). 
Abdomen, 3 16°5-21-5, 9 15-20; hind wing, 3 20-27:5, 9 21-25; costal edge of pterostigma, front 
wing, 2°7-3°5 mm. Antecubitals, hind wing, 8-9. The range in size(in millim.), in different localities, 
is shown by the following :— 
Panama (M. C. Z.). Colon. Bonda. Rio Janeiro. Sapueay. 
Abdomen, g ........ 18-21 16°5-19 17°5-21 17°5-21°5 18°5-20°5 
Hind wing, 3 ........ 23-26 22-23°5 22-26 22°5-26 22°5-25°5 
A careful comparison of the Panama and Sapucay examples has failed to reveal any constant differences. 
Hab, Mexico, San Lorenzo, Cordova (Trujillo: 1 *), Atoyac [2 ¢ *], Teapa [12 ¢ *, 
13 9 | (H. H. Smith), Tenosique in Tabasco (Barrett, coll. P. P. C.: 2 2), Lumija in 
Chiapas (coll. Westcott: 1 3); Guatema.a, Puerto Barrios [1 ¢ *], Los Amates [1 ¢ ], 
Gualan [3 ¢*+1 3] (Deam, Williamson, Hine, colls. Wlimsn., O. S. U.); Costa 
Rica, San José (Biolley: 1 ¢ *+1 ¢ ), Surubres near San Mateo (Biolley, coll. Kahl: 
30 ¢ *,5 2); Panama? (coll. McLachlan: 1 9, with label “ Libellula fusca, R., ¢, 
incompta, 2 R., oblita, Hag.,” in de Selys’s hand) [4 3, 3 @ |, Obispo [Hassler Exp. : 
13] (MC. Z.), Colon (Howland, coll. Needham: 7 3,62), {La Chorrera (Doldy- 
Tyler °).—CoxomB1a (Thorey, M. C. Z.: 1 3), Bonda [21 ¢, 11 9] and Onaca [2 o, 
1 2 | (HZ. H. Smith, Carn. Mus. Pitisb.) in Dept. Magdalena; VeENEzuELA® (Appun, 
M.C. Z.: 26*) [16,2 9], La Guayra [Lyon & Robinson, 1 ¢*+1 6,12] 
* Intermediate in wing-colouring between d and e. 
BIOL. CENTR.-AMER., Neuropt., October 1906. 2m 
