ARGIA 299 
of about equal width, both twice as wide as the pale antehumeral stripe. A heavy 
black line on the third lateral suture (p. 289). Abdomen: segment 1 pale 
with a broad angulate basal spot and two small round lateral spots of black. 
Segment 2 black on the dorsum with small irregular basal pale greenish spot on 
either side of the meson. Segments 3-6 black on the dorsum with interrupted 
basal rings and two postbasal dorsal spots pale. Segment 7 almost entirely 
black. Dorsum of 8-10 blue, sides marked with black. 
Female.—Like the male. Head brown above with a few black stripes in the 
ocellar region. Thorax with the black middorsal stripe wanting or feebly 
represented on either side of the carina. Dark humeral stripe represented by a 
hair line only. A black line on the metapleural suture. Abdomen segments 1-7 
dull brown, sides tawny, basal rings ill defined. 8-10 tawny. 
287. Argia solita Kennedy 
Kndy. 718, p. 256. 
Length 31 mm. Expanse 48 mm. Ariz. 
Male.—Head creamy beneath, violet above, no black present at all. Pro- 
thorax violet with a small black spot on either side. Thorax violet. Black mid- 
dorsal stripe narrow about one-sixth as wide as the pale antehumeral stripe. 
A mere hair line on the humeral and the third lateral sutures. Abdomen violet, 
black as follows: small lateral spot on the apex of 1; narrow apical ring on 2; 
lateral, irregular, apical spot, one-fourth the length of the segment, and a narrow 
apical ring on 3-6; segment 7 with an interrupted irregular stripe along the side, 
below the apical end of which is a small detached spot. Segments 8-10 blue. 
Female.—Unknown. 
288. Argia tibialis Rambur 
Ramb. ’42, p. 241; Mtk. Cat. p.50: Whed. ’14, p. 92: Garm. ’17, p. 511. 
Length 34-37 mm. Expanse 42-50 mm. C., M. and S. States 
Found in June, July and August along the edge of streams or pools, flitting 
along the banks or resting among the bordering vegetation. 
Male.—Mouth parts buff. Face blue or brownish. Vertex and occiput black 
with pale spots in the neighborhood of the ocelli. Prothorax black a lateral spot 
on each side of the middle lobe, brown. Black middorsal thoracic stripe about 
half as wide as the paler antehumeral, black humeral about as wide as the latter. 
Sides of the thorax tawny with a black line on the third lateral suture. Dorsum 
of abdominal segments 1-8 black, with narrow yellow basal rings on 2-7, sides 
of 2-7 narrowly pale. Dorsum of 9-10 yellow or blue, sides inferiorly black. 
Female.—Light in color, much more so than the male. Humeral stripe 
narrower. Abdomen with segment 2 dark with a median pale spot, segments 
3-6 with a fine pale line on the middorsum, sides broadly pale; 7-9 entirely black; 
10 mostly pale, darker below. 
289. Argia tonto Calvert 
Calv. ’02, p. 89: Mtk. Cat. p. 51. 
Length 37-40 mm. Expanse 54-60 mm. Ariz. 
Male.—Color violet and black. Black middorsal and humeral stripes re- 
duced to little more than lines. Abdomen with segment 2 pale, each side with 
