152 ; NEUROPTERA. 
Front wings with 12-13 antecubitals, 7-8 postcubitals, pterostigma 3 mm., a double cell in the midst of the 
single postcostal row at the level of the arculus, only one row throughout all the area between second 
sector of triangle and hind margin. 
Left hind wing with internal triangle free. 
Hab. Guaremaa, San Gerénimo (Champion: 1 2, the last eight abd. segs. lacking). 
—CotomBis, Bonda in Dept. Magdalena (H. H. Smith, Carn. Mus. Pittsb.: 1 6, last 
seven abd. segs. lost), Bogota!; British Guiana, Demerara River (M‘Lachlan, in litt., 
98, vii. 1903); Brazit, Chapada (H. H. Smith, Carn. Mus. Pittsb.*: 1 2, the last seven 
abd. segs. lacking). 
Having sent a photograph illustrating the venation of the San Gerdnimo specimen 
to Mr. M‘Lachlan, in whose collection the type is, he wrote (28. vii. 1903), “ Your 
photo of supposed P. pygmaeus agrees sufficiently in neuration with my type; there 
are one or two asymmetrical individual differences, but being asymmetrical not of 
importance. The photo gives the idea of the wings being tinted towards the base ; 
in the type there is only a very small yellowish cloud at the extreme base. I believe 
I have a second example, a very immature 9, from the Demerara River (British 
Guiana).” 
The wings of the San Gerdénimo male are slightly smoky throughout along the 
veins, and there is an indefinable yellowish tint as the bases are approached, neither 
of which is true for the Chapada female or the Bonda male. 
GOMPHOIDES. 
Gomphoides, Selys, Bull. Acad. Belg. xxi. pt. 2, p. 73 [54] (1854) *; Selys & Hagen, Monogr. 
Gomph. pp. 206, 208 (1858)*; Kirby, Cat. Odon. p. 73 (1890) °. 
Cyclopiylla, Selys, 1. c. p. 76 [57] (1854)*; Selys & Hagen, lc. p. 216 (1858) °; Kirby, l.c. 
p. 74 (1890) °. 
Aphylla, Selys, 1. c. p. 78 [59] (1854)7; Selys & Hagen, 1. c. p. 227 (1858)*; Kirby, 1. c. p. 74 
(1890) °; Needham, Canad. Ent. xxix. p. 168 (1897) *. 
These three “sous-genres ” of de Selys are here united because I can find no satis- 
factory character for separating them. The major feature employed by him was the 
internal triangle of the hind wings, cross-veined in Gomphoides, free in the other two. 
Of the fifty-five individuals which I have been able to examine for the present work, 
six (or 11°/,) are asymmetrical in this feature; de Selys himself has disregarded it in 
G. (2) annectens and G. ambigua, and has given f a number of arguments for the union 
of these three groups. | 
* This abbreviation stands for the Carnegie Museum of Pittsburgh, Pennsylvania, whose director, 
Dr. W. J. Holland, has recently, and with great kindness, sent me the Neotropical Odonata belonging to 
that institution for study. 
+ Bull. Acad. Belg. (2) vii. p. 547 [21] (1859) under Cyclophylla protracta; 1. c. (2) xxviii. p. 193 [80] 
(1869) under G.? annectens, p. 195 [32] under C. pegasus, p. 196 [83] footnote; J. c, (2) xxxvi. p. 506 [62] 
(1873) under G. ambigua. 
