° 
376 SUPPLEMENT. 
2. Differs from the male as follows :—Pale antehumeral stripe at mid-height about three-fourths as wide as 
black mid-dorsal, black stripes on segment 2 meeting on the mid-dorsum in the apical third of the segment ; 
~~ 3-7 black with a narrow transverse basal violet-blue ring, which on 3-5 is prolonged backward as a mid- 
dorsal stripe reaching to three-fourths of the length of 8 and 4 and to two-thirds of 5; 3-6 also with a 
pale inferior longitudinal streak on the middle third of each segment and connected with the transverse 
basal ring on 3; 8-10 as in the male, but with the addition on 9 of a pair of basal dorsal black spots one- 
fifth as long as the segment, each narrowly confluent at extreme base with the inferior black stripe of the 
same side. 
3 2. Pterostigma of the front wings -83-1-01 mm. long, surmounting more than one (33°3 °/, 3, 50 °/, 9), 
one (33:3 °/, 3, 50 °/, 2), or less than one (33'3 °/, 3) cell; of the hind wings -94-1:01 mm. long, 
surmounting more than one (833 °/, ¢, 25 °/, 2), one (75 °/, 2), or less than one (162 °/, 3) cell. 
Antenodal cells 3 on all wings (¢ 2). 
Dimensions.—Abdomen, $ 26-28-5, 2 23-24; hind wing, g¢ 19-20, 9 195-20 mm. 
Hab. GuatEMALAa, Mazatenango (Wllmsn., coll. ejusd.: 2 pairs; Maxon & Hay, 
U.S. N.M.:1 3). 
The specific name proposed is that of a Guatemalan tribe. 
Argia violacea pallens (p. 98). 
The inferior appendages of the Guatemalan male are not typical, being more like those shown in fig. 54, 
Tab. IV., but the specimen surely belongs here. 
To the localities given, add :—Guarema.a, between Fl Rancho and Sanarate [1 pair |, 
Sanarate [1 2 | (Wllmsn., coll. ejusd.) (Hine, coll. 0. S. U.: 1 2). 
ARGIALLAGMA * (to follow the genus Argia, p. 100). 
Argiallagma, Selys, Bull. Acad. Belg. (2) xli. pp. 498, 500 (1876). 
This genus apparently belongs to the same division of the legion Agrion as do 
Hyponeura and Argia, since the biserial hairs on the legs are nearly, or quite, twice as 
long as the intervals separating them. It differs from those genera, however, in the 
smaller number of those hairs (5-7 on the third tibiz), in the reduced number of 
postcubitals, with the result that the nodal sector arises at the fifth on the front wings, 
at the fourth on the hind (the origin of this sector is at one or more postcubitals 
farther distad in Hyponeura and Argia), and in the presence of an apical ventral spine 
on the eighth abdominal segment of the female. 
The arculus is a little more remote than the second antecubital. 
There is but one known species :— 
1. Argiallagma minutum. (Tab. X. fig. 35.) 
Trichocnemis minuta, Selys, in Sagra’s Hist. Cuba, Ins. p- 464 (1857)'; Hagen, Syn. Neur. 
N. Amer. p. 72 (1861) ?. 
‘Enallagma minutum, Kirby, Cat. Odon. p. 145 (1890) *. 
* This generic name has been omitted from the various Nomenclators and Catalogues, 
