54 NEUROPTERA. 
Opaque spot on the wings (false pterostigma) not reaching to the extreme 
tip; in the males it stops short of reaching the end of the median vein 
by a distance greater than its own length; in the females it reaches to 
the principal sector or to one row of cells below it. Superior appendages 
of the male not bent downward in their apical half, inferiors rudimentary. 2. accedens, Selys. 
1. Pseudostigma aberrans. (Tab. III. fig. 17.) 
Pseudostigma aberrans, Selys, Bull. Acad. Belg. (2) x. p. 18 (1860) *; Mém. Couron. Acad. Belg. 
xxxviii. p. 28 (1886); Hagen, Syn. Neur. N. Am. p. 64 (1861) °*. 
g. “Pterostigma ” 8-9 mm. long on the front wings, 9-10 mm. on the hind, varying in colour from pale 
yellow to dark brown or black, upon which latter a pruinosity appears ; these differences probably 
correspond with increasing age. The second row of cells occupied by the pterostigma may number 
as many as 12. 
©. Opaque spot varying in colour from pale yellow to orange. Although de Selys speaks of its reaching the 
subnodal sector, it does not extend below the nodal in more than one female of the material examined. 
It is bordered, along its inner edge, by a perfectly transparent area, due to the reticulation being white 
or very pale yellow, while that of the rest of the uncoloured part of the wing is dark brown or black. 
g Q. Antenodal cells very variable in number, from 8 to 5+ on the front wings, most commonly 4 
(33 °/, 3) or 3+ (85 °%/o 2); 3 most commonly on the hind wings (66 ?/, d, 65 lo 2 )a 
Abdomen, ¢ 114-180, 2 85-110; hind wing, d 63-78, 2 57-74 mm. 
Hab. Muxico, Cuesta de Misantla (Zrujillo: 1 ¢), Atoyac (Schumann: 1 3), 
and Presidio (Barrett, coll. P.P.C.: 16,12) in Vera Cruz°, Teapa in Tabasco 
(H. H. Smith: 1 9); Guatemata (coll. McLachlan: 1 3), Panzos [2 2] and Sabo 
[1 ¢, 22] in Vera Paz, Zapote [1 9 ], San Isidro [2 ¢] (Champion); Honpuras 
(coll. P.P.C.: 1 ¢); Costa Rica, Boca de Simon, Diguis valley, 250 metres (coll. 
C. C. Adams); Panama®, Chiriqui?, Volcan de Chiriqui below 4000 feet [1 2 |, and 
Bugaba [1 ¢ ] (Champion). 
It is possible that some of the females included by me under P. aberrans correspond 
better to Selys’s description ? of P. accedens. The single female here referred to this 
latter species is there placed because of the much smaller extent of opaque colouring 
than in any of the specimens of that sex enumerated above under P. aberrans, thus 
conforming to the difference in the extent of the opaque spots in the males of the two 
species. It may be mentioned that all the females of Pseudostigma examined have the 
tip of the genital valvules denticulated, so that it seems impossible to use this as a 
specific character. As to the other differences given by de Selys as separating the. 
females of these two species, I cannot find that they are constant. 
It is worthy of note that the female from Cuesta de Misantla has three rows of cells 
for a considerable part of the area between the inferior sector of the triangle and the 
hind margin on all four wings; this same insect has the opaque yellow spot reaching 
the greatest extent noted above. 
Specimens were found at Boca de Simon in February, at Teapa in April, and at 
Presidio in July. 
