ARGIA, 89 
19; H. H. Smith: 4 3,3 2), Omilteme in Guerrero 8000 feet (H. H. Smith: 2 2), 
Cordova ?, 
In 1897 I made notes on the types of Hagen, two females in which segments 7-10 
have been lost, now in the M. C. Z.; these notes are incorporated in the above 
description *. 
25. Argia fissa, (Tab. IV. figg. 12, 50, 50s.) 
Argia fissa, Selys, Bull. Acad. Belg. (2) xx. p. 401 (1865) *; Calvert, Proc. Calif. Acad. Sci. (3), 
Zool. i. p. 381, t. xxv. fig. 11 (apps. ¢) (1899) ?. 
d. Rear of the head pale. ‘he width of the pale (blue) antehumeral stripe varying (even in the same locality, 
e. g. Guadalajara, Duefias) from three-fourths to five times the width of the black mid-dorsal stripe, which 
latter may be still more reduced to a mere line on the carina. Black humeral stripe not forked, one- 
fourth as wide in its lower half as the pale antehumeral, or reduced to a line. Segment 2 blue, each 
side with a longitudinal black stripe, wider at its hind end, which does not reach the apex of the segment 
nor meet its fellow of the opposite side, or only the hind end of this stripe may be present as a spot ; 
3-7 blue, each side with a black spot in the apical fourth or fifth, which on 7 is prolonged forward asa 
stripe nearly to base; only rarely (1 ¢ San Gerdnimo, 1 ¢ Rio Sarstoon) does the black on one side of 
3-7 meet that of the oppesite side on the mid-dorsal line; occasionally (1 ¢ Diente, 1 ¢ Texolo) 7 is 
marked like 3-6; 8 and 9 blue, unmarked. 
§. Differs from the male as follows :——Pale colours throughout usually pale brown rather than blue. Mid- 
dorsal thoracic stripe hardly more than a line. Humeral stripe a mere line, slightly wider at either end. 
Segment 2 with a mere trace of a dark anteapical spot, or as in the male. 
3 Q. Pterostigma of the front wings ‘8-9 mm. long, surmounting more than one cell (70°5 9/, 3, 70°/, Q), 
one cell (20°5 °/, ¢, 16°6 °/, 9), or less than one cell (9 °/, ¢,18°3 °/, 2); of the hind wings ‘9-1 mm. 
long, surmounting more than one cell (74 °/, 5, 96°6 °/, 2), one cell (20 °/, 3, 3:3 °/, 2), or less than 
one cell (6 °/, 3). 
Antenodal cells on the front wings 5 (70°5 °/, 5,666 9/, 9), 4 (24:5 9/5 5,30 °/, 9), 44+ (2 9/, 6,33 °/, 2), 
or 3 (1 °/, 3); on the hind wings 4 (95 °/, 5, 94 °/o 2),3 (4% 5,5 % 2), or 5(1 "3 2). 
The wings usually have a decided yellowish tinge. 
Dimensions.—Abdomen, ¢ 29-38, 9 28-80; hind wing, ¢ 21°5-25, 9 22 5-26 mm. 
* Probably worthy of specific distinction, although nearly related to A. lacrymans, are two males and a 
female, in alcohol, frem Tombstone, Arizona, received from Prof. Needham. The male appendages and female 
mesostigmal lamine differ slightly, as may be seen by comparing figg. 17, 48, 48s, Tab. lV. . The two males 
have their pale colours violet, instead of blue, the black mid-dorsal and humeral stripes are reduced to little 
more than lines, the dorsal violet on segment 7 extends only on the basal fourth, and 8 and 9 have an inferior 
black stripe each side, for the apical two-thirds on 8 and the entire length on 9. The female has the pale 
antehumeral stripe at mid-height one and one-quarter times as wide as the black mid-dorsal; humeral stripe 
not forked, a mere line in its upper half, lower half one-fifth to one-half (at its lower end) as wide as the pale 
antehumeral; the black postbasal stripe on either side of segments 3-6 is united with the apical black on 5 
and 6 only; 8 and 9 blue, a narrow black vitta on either side of the dorsum in the basal fifth. 
& 9. Pterostigma of the front wings, 1-4 ¢, 13mm. 92, of the hind wings, 1:5 ¢,1-4mm. 9, surmounting 
more than one cell. 
Antenodal cells on the front wings 5, on the hind 4. 
. Dimensions.—Abdomen, ¢ 33°5-35, 2 32; hind wing, ¢ 26°5-29, 9? 29 mm. 
Prof. Needham’s express request prevents me from naming this species after himself, and I therefore call it 
Argia tonto, the “ Tontos” being an Arizonan tribe. 
BIOL. CENTR.-AMER., Neuropt., January 1902. Nn 
