ARGIA.. 87 
21. Argia harknessi, (Tab. IV. figg. 21, 45, 457.) 
Argia harknessi, Calvert, Proc. Calif. Acad. Sci. (3), Zool. i. p. 378, t. 25. fig. 6 (apps. 3) 
(1899) °. 
¢. Rear of the head black. Pale antehumeral stripe one and a half times to twice as wide as the black mid- 
dorsal. Humeral stripe at middle one-third as wide as the pale antehumeral. Segment 2 blue, each 
side with a triangular, anteapical, black spot, or this prolonged into a stripe to base (Rio de las Balsas ¢ ), 
and an inferior longitudinal black stripe ; 3-6 blue, each side with a short isolated basal streak (mention 
of which was omitted from my original description), which may be absent from 3, and an anteriorly- 
pointed, apical, black stripe uniting with its fellow of the opposite side on the mid-dorsal line in the apical 
third to half; 7 black, except for a pale, transverse, basal ring; 8 and 9 blue, each side with an inferior 
black stripe in apical three-fourths of 8 and for entire length of 9. 
©. Differs from the male as follows :—Rear of the head pale. Segment 2 with a black stripe each side as 
long as the segment; 3-6 as in the male, but with the apical black stripe on each side reaching 
almost to base; 8 and 9 as in the male, but in addition each side has a superior black stripe for the 
entire length of the segments. 
3. Pterostigma of the front wings, -9 ¢,1:18mm. 2, surmounting one cell (71°5 °/, d and the one 2 , 
more than one cell (21°3 9/5 3), or less than one cell (7 °/, d); of the hind wings, 1 g,1:3 mm. 9 long, 
surmounting one cell (71:5 °/, d), more than one cell (21°3 °/, ¢ and the one 9 ), or less than one cell 
7 o Oo 3 
Amtesodels the front wings 5 in all cases, on the hind wings 4 (86 °/, ¢ and the one 2) or 5 (14 9/, 3). 
Dimensions.—Abdomen, ¢ 32-34, 9 31; hind wing, ¢ 23°5-25, 9 26 mm. 
Hab. Mexico, Tepic (Eisen & Vaslit, coll. Calif. Acad. Sci.: 5 3,19), Savana 
Grande (H. H. Smith: 1 3), and Rio de las Balsas (Barrett, coll. P. P. C.: 1 3) in 
Guerrero. 
Taken in July, October, and November. 
92. Argia barretti, sp.n. (Tab. IV. figg. 46, 46 s.) 
3. Rear of the head black, a pale stripe along the eyes inferiorly. Pale (blue) antehumeral stripe twice as 
wide as the black mid-dorsal. Humeral stripe of almost equal width throughout, not forked, one-fourth 
as wide as the pale antehumeral. Segment 2 blue, each side with a superior black stripe triangularly 
dilated at its hinder end, which does not reach the apex of the segment, and an elongate, inferior, isolated 
black spot; 8-6 blue, each side with an inferior black stripe trom shortly after the base to the apex, 
before which it is dilated (in the apical] fifth or sixth) and meets its fellow of the opposite side on the 
dorsum ; 7 similar, but the black stripes wider and united on the dorsum on the apical half of the segment, 
thus leaving only a transverse basal ring and a prolongation therefrom, pointed posteriorly, on the mid- 
dorsal line, blue; 8-10 pale (blue), each side with an inferior black stripe as long as the segments. 
Pterostigma of the front wings 1 mm. long, of the hind wings 1-25 mm. long, surmounting more than one cell 
in all. 
Antenodal cells on the front wings 5, on the hind wings 4 or 5. 
Dimensions.—Abdomen 34, hind wing 24 mm. 
@ unknown. 
Hab. Mexico, Linares in Nuevo Leon (0. W. Barrett, coll. P. P.C.: 1 3). 
} 
The colours of this species are much like those of A. chelata, but the appendages 
are widely different. It approaches <A. insipida, Selys, but differs in the form of the 
appendages, and also in having more blue on the thoracic dorsum and the black 
humeral stripe narrower. 
The type was captured in July. 
