ARGIA. 7d 
?. Differs from the male as follows :—Rear of the head black with a pale stripe along the eye-margins. Pale 
mid-dorsal line on segments 3~7 wider ; 8 and 9 pale (blue ?), each with a superior and an inferior brown 
(probably black in adult) stripe, the latter as long as the segments, the former occupying the basal two- 
thirds or, on 8 in some specimens, reaches the apex. 
& Q. Pterostigma of the front wings, 1:18 ¢, 1-4 9 mm. long, of the hind wings 1:5 mm. long, surmounting 
more than one cell on all. 
Antenodal cells on the front wings 6 (75°/, ¢, 662°/o 2) or 5 (25%, od, 333 °/o 29); on the hind wings 
5 (75 %/, 5, 100 9/, 2) or 4 (25/5 S). . . 
Dimensions.—Abdomen, 3 37:5, 9 36; hind wing, ¢ 28, 2? 30 mm. 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith, Schumann: 4 3,3 9). 
Of the seven specimens examined, some were taken in April and May; only one 
female is older than the teneral stage. The majority of individuals have a greater 
number of antenodal cells than usually occurs in Argia, thus suggesting the specific 
name proposed. 
2. Argia calida. 
Agrion calidum, Hagen, Syn. Neur. N. Am. p. 93 (1861)* (the ¢ only, according to Selys). 
Argia calida, Selys, Bull. Acad. Belg. (2) xx. p. 390 (1865). 
3. Rear of head black. Pale antehumeral stripe one-third as wide as the black mid-dorsal. Humeral stripe 
one and one-half times as wide as the pale antehumeral. Segment 2 black, except for a small mid-dorsal 
pale spot; 3-7 black with a narrow, transverse, basal, pale ring; 8 black; 9 blue, each side with an 
inferior black stripe as long as the segment. 
Pterostigma surmounting one cell in one male, more than one in the other. 
Antenodal cells on the front wings 5 (4 in one wing of one male), on the hind wings 4 (5 in one wing of 
one male). 
Dimensions.—Abdomen 32, hind wing 23 mm. 
@ unknown. . 
Hab. Mexico, Tampico! ? (12. C. Z.: 2 ¢ types of Hagen). 
I drew up this description in 1897 from the two types, and have not since compared 
them with the other material. The inferior appendages, according to Hagen’s profile 
drawing, are much like those of our fig. 46, ‘Tab. IV., the superiors somewhat as in 
our fig. 36. 
3. Argia wilsoni, sp. n. (Tab. IV. figg. 28, 28s.) 
¢. Rear of the head black. Thoracic dorsum black, no pale antehumeral stripe, humeral stripe concolorous 
and continuous with the thoracic dorsum, and reaching the first lateral suture. Segment 2 black, with 
a, mid-dorsal oval blue spot in the basal two-thirds and an inferior pale streak each side; 3-8 black, 
with a narrow, transverse, basal, pale ring, medially interrupted ; 9 blue, each side with an. inferior 
black stripe as long as the segment. 
Pterostigma of the front wings ‘94 long, of the hind wings 1 mm. long, surmounting more than one cell on all. 
Antenodal cells 4 on all the wings. 
Dimensions.—Abdomen 28, hind wing 19 mm. 
Hab. Guatema.a, Livingston (H. Wilson, M. C. Z.: 1 ¢). 
The unique type, taken between the months of February and April, 1885, agrees in 
some respects with the description of A. ¢hespis, but differs from Hagen’s drawing of 
the appendages, and by having four antenodal cells and no pale antehumeral stripe. 
[2 
