HYPONEURA.—ARGIA. 67: 
2. Hyponeura funcki. 
Hyponeura funcki, Selys, Monogr. Calopt. p. 275 (1854) +; Bull. Acad. Belg. (2) xx. p. 381 (1865) *. 
3. Black paramedian stripes on thoracic dorsum reaching from anterior mesepisternal border to axillary 
callus, contiguous with the mid-dorsal carina for their entire length. In older males the humeral and 
posthumeral black stripes fuse for their upper halves or entire length. Segment 8 with no pale markings 
or merely a trace of a pale basal lateral stripe. 
Q. Paramedian black stripes on thoracic dorsum occupying the middle half to three-fourths of the distance 
from axillary callus to anterior mesepisternal border. 
3 2. Pterostigma on the front wings surmounting 2+ (49 °/,d,47 °/o 2), 1+ (27 9/45, 84 %/o 2), or 2 
(24 °/, $,19°%/, 2) cells; on the hind wings 2+ (49 °/, 5,655 °/, 2), 14+ (30°6 °/o 5,19 %/o )s 
or 2 (20°4 °/, 3, 15°5 °/, 2 ) cells. 
Antenodal cells on the front wings 7 (51 °/, 3,53 °/, 2), 6 (88 °/o 5, 44 °%/, 2), B+ (9 Jo 5,16 Yo 2), 
8 (2°/, d), or 7+ (16 °/, 2); on the hind wings 6 (77 °/, 3, 69 9/, 2), 5 (195 %/, 3, 31 °/o 2), 
or 5+ (35 °/, 3). 
Hab. Mexico, Guadalajara [1 ¢ ], Mexico city [1 ¢ ] (Schumann), Cuernavaca (coll. 
Dmea), Atoyac (H. H. Smith, Schumann: 17 3, 27 2), and Chavarillo (Barrett, coll. 
P.P.C.: 86,5 2) in Vera Cruz; GuatemaLa, San Gerénimo (Champion: 1 ¢ ).— 
CotomBia!2; VENEZUELA, Cumana ?, 
ARGIA. 
Argia, Rambur, Névr. p. 254 (1842)*; Selys [and Hagen], Bull. Acad. Belg. (2) xx. p. 382 
(1865) *; Kirby, Cat. Odon. p. 137 (1890) °. 
The genus Argia, while not confined to Tropical America *, is most numerous there 
and forms a characteristic feature of the fauna. Few Odonata are more difficult to 
identify specifically, so that I have been obliged to devote a large amount of time to 
the study of this genus. I had planned a revision of the North-American species 
before undertaking the present work, but the former task has been merged in the 
latter. The difficulties experienced have led me to a perhaps more comprehensive 
treatment than has been given to other parts of the subject, and all the species which 
I have been able to examine are here described on a uniform and methodical plan. 
Before explaining some details of these descriptions, it seems desirable to name the 
chief aids which I have had in identification. 
In previous years I have compared specimens in my collection with types of a few 
species in those of Baron de Selys and of Dr. Hagen. Thanks to the kindness of 
Mr. Samuel Henshaw, I have had free use of a series of drawings made by Dr. Hagen 
in 1864 to illustrate the appendages of the males of this genus, but never published. 
Of the forty-seven species recognized in the Synopsis of 1865 *, forty are thus figured. 
These drawings have been of the greatest service, for, made from the types, they shed 
a flood of light on the obscurity of the too brief descriptions. , 
_ * The extra-American species, three in number, inhabit the Kurile Is., the Moluccas, and the Cape of 
Good Hope respectively; but the Moluccan species, A. optata, Hagen, may not be congeneric. In America 
R 2 
some species reach as far north as Maine, others south to Buenos Aires. 
