246 NEUROPTERA. 
Anatya anomala, Kirby, Trans. Zool. Soc. Lond. xii. p. 338, t. 53. fig. 9 (entire ¢), t. 57. fig. 7 
(apps. ¢)”*°*. 
Agrionoptera difficilis, Selys, Ann. Mus. Civ. Stor. Nat. Genova, xiv. p. 301 (1879) ». 
Lathrecista (?) difficilis, Kirby, Cat. Odon. p. 30 (1890) ”. 
Hab. Mexico, Atoyac (H. H. Smith: 1 2) and Presidio (Barrett, coll. P. P. C.: 
2 9) in Vera Cruz.—Venezvena (U. S. N. M.: 1 3); Guianal®, Surinam (coll. 
P. P. C. ex coll. R. Martin: 1 3,19; MC. Z.: 2 2); Braz 5, west end of 
Parana de Buyassu ®, Gurupa§, Chapada (H. H. Smith, Carn. Mus. Pittsb.: 23,1 2, 
+5 36,7 2*). 
Taken in January (Parand de Buyassu®), February (Gurupdé§), April (Atoyac), and 
June (Presidio). 
A. guttata passes through the same changes in colour with advancing age as does 
normalis. 
Dr. Ris has written me (6. xii. 05): “The types of Agrionoptera difficilis, from 
uncertain locality (Malaisie ?) 11, in the de Selys collection, are a couple of A. guttata, 
the male with broken 10th segment and appendages.” 
The females of Anatya before me have been assigned to one or other of these two 
species solely according to their size, since I know of no other difference. As a result, 
the male from Presidio in Vera Cruz, an undoubted normalis, is separated from the 
two females labelled by the collector as from the same place and month. This is 
another circumstance which strengthens the hypothesis suggested on page 244 as to 
the relations of the two nominal species to each other. 
ERYTHRODIPLAX. 
Erythrodiplax, Brauer, Verh. zool.-bot. Ges. Wien, xviii. pp. 8368, 722 (1868) *; Kirby, Trans. 
Zool. Soc. Lond. xii. pp. 264, 265, 278 (1889) *; Cat. Odon. p. 21 (1890)*; Ris, Hamburg. 
Magalh. Sammelr., Odon. p. 35 (1904) +. 
Diplaxz, pars, Brauer, 1. c. p. 721 (1868) ’. 
Trithemis, pars, Kirby, ll. cc. pp. 277 (1889) °, 18 (1890) ”. 
This genus is composed of chiefly Tropical-American species, about thirty in 
number according to Dr. Ris’s estimate*+. Of these, one (berenice) extends, as a 
sea-coast species, as far north as Massachusetts; others occur in Argentina and Chile 4. 
Most of them are very variable in colouring; some are interesting in presenting 
two colour-forms of females (wmbrata, funerea, berenice). Individuals are numerous, 
every collection of ‘Tropical-American Odonata containing one or more representatives 
of this genus; 1600 specimens are cited in the following account. 
Brauer not having specified a type-species, Mr. Kirby? has designated plebeia, 
Rambur, as such. Dr. Ris 4, however, regards fusca, Rambur, as the type, this being 
* The specimens after the plus sign have no locality-labels, but are supposed to be from Chapada. 
