PSEUDOSTIGMA.—MECISTOGASTER. 55 
2. Pseudostigma accedens. (Tab. III. fig. 22). 
Pseudostigma accedens, Selys, Bull. Acad. Belg. (2) x. p. 19 (1860) * ; Mém. Couron. Acad. Belg. 
Xxxviii. p. 29 (1886) 7; Hagen, Syn. Neur. N. Amer. p. 63 (1861) °. 
3. “ Pterostigma ” on the front wings 2 mm. long, occupying five cells on the front row and two on the 
second; on the hind wings 24 mm. long, occupying 5-7 cells on the front row and one on the second— 
dark red on all. 
©. “ Pterostigma” 3 mm. long on all the wings, lemon-yellow, occupying three rows of cells on the front 
wings (some of those of the first row being double) and two rows on the hind. The reticulation between 
the “ pterostigma” and the tip of the wing is pale-coloured. 
3S 9. Antenodal cells on the front wings 4 (except in one wing of male), on the hind wings 3. 
Abdomen, ¢ 113, 2 103; hind wing, d 60, 9 66mm. 
Hab. Mextco!, Vera Cruz (fide Selys1), Presidio in Vera Cruz (Barrett, coll. 
P.P.C.: 1); Honpuras (coll. McLachlan: 1 @ ). 
The statements above made are based entirely on the pair examined. (See also the 
remarks supra on the female of P. aberrans.) 
The male from Presidio, Vera Cruz, is labelled as having been captured in July. 
MECISTOGASTER. 
Mecistogaster, Rambur, Ins. Névropt. p. 281 (1842) ; Selys, Bull. Acad. Belg. (2) x. p. 19 (1860); 
Mém. Couron. Acad. Belg. xxxviii. p. 16 (1886) ; Kirby, Cat. Odon. p. 120 (1890). 
Preia, Gistel, in Gistel u. Bromme, Handb. d. Naturgesch. (Stuttgart), p. 452 (1850). 
The two species found within the Central-American fauna are easily distinguished as 
follows :— 
Tips of all the wings with an opaque spot whose upper surface 
through orange-yellow to dark olive according to age. 1. ornatus. 
of cells on the front wings 
No pterostigma. 
varies from pale yellow 
A (false) pterostigma present, occupying two rows 
and one row on the hind wings. No terminal opaque spot . . . . . + 2% modestus. 
These two species agree in certain characters which distinguish them with others 
from a characteristic South-American group of the genus, viz., that the costal margin 
of the hind wings is not dilated before the apex and that the superior appendages of 
the males are regularly curved throughout, not angulate. 
1. Mecistogaster ornatus. 
Mecistogaster ornatus, Ramb. Névr. p. 283 (1842)*; Selys, Bull. Acad. Belg. (2) x. p. 20 
(1860) 7; Mém. Couron. Acad. Belg. xxxviii. p. 17 (1886) °; Hagen, Syn. Neur. N. Amer. 
p- 64 (1861) *; Kirby, Cat. Odon. p. 120 (1890) *; Ann. & Mag. Nat. Hist. (7) iii. p. 371 
(1899) °; Calvert, Proc. Cal. Acad. Sci. (3), Zool. i. p. 377 (1899)"; Butler, Entom. XXxiil. 
p. 191 (1900) *. 
Hab. Mexico}, Presidio de Mazatlan (Forrer: 1 ¢ ), Acapulco (Agassiz "), Barranca 
Blanca near Tepic 2400 feet (Eisen & Vaslit’), Jalapa (Trujillo: 1 3), Plan del Rio 
(coll. Barrett), Atoyac (Schumann, H. H. Smith: 2 2), and Presidio (Barrett, coll. 
