ENALLAGMA 341 
342. Enallagma coecum Hagen 
Hag. ’61, p. 84: Mtk. Cat. p. 56: Calv. ’19, p. 350. 
: Var: novae-hispaniae Calv. 
Length 34 mm. Expanse 44 mm. Tropic Calif. 
It is doubtful whether or not this species has been collected in the United 
States; certainly its nearest relative cardenium has, and probably this one has 
also. Color is “rosy-blue”’ and black. Male. Head black with wide blue post- 
ocular spots, measuring .45-.49 mm. from cephalic to caudal edge. Prothorax 
black, with the anterior lobe transversely pale, middle lobe with or without pale 
lateral spots, posterior lobe with a pale spot on the caudal margin. Sides with 
the black of the middle lobe sinuately, and not deeply emarginated by the pale 
color inferiorly. Thorax rosy-blue marked with the usual black stripes. Ab- 
domen with the black on segment 2 in the form of a U, the open end directed 
forward. Segment 3 with the sides and the apex black. 8-9 with inferior longi- 
tudinal black stripes on each side. The dorsum of 9 and usually 8 entirely blue. 
Superior appendages bifid, the cleft tending to fill out in some specimens, upper 
arm longer, lower arm short and flap-like, a small single tooth on the inner 
margin of the upper arm at about two-thirds its length. 
Female similar to the male except the abdomen which is mainly brassy black; 
segments 3-7 with yellow basal rings, the sides and the 8th segment almost 
entirely blue. 
cardenium exclamationis 

343. Enallagma cardenium Selys 
Selys ’76, p. 580: Mtk. Cat. p. 56: Wmsn. ’22, p. 143: Calv. ’19, p. 351. 
Length 34 mm. Expanse 44 mm. Fla. 
This is an Enallagma of tropical distribution and is recorded from United 
States only in the Florida region, where it frequents floating water hyacinths in 
running water, in sandy bottomed creeks. The color is dull violet gray and black, 
quite un-Enallagma-like, and this color is lost or obscured by post mortem 
changes in old museum specimens. Head pale, except for a black band between 
the eyes covering part of the frons and the vertex. Postocular spots narrow, ir- 
regular, and usually separated, measuring from .28-.38 mm. from caudal to 
cephalic border. Prothorax mostly black, except for a transverse area on the 
anterior lobe and a fine line on the posterior lobe, and occasional spots on the 
middle lobe. The black of the sides of the middle lobe angularly and deeply 
emarginated by the pale color inferiorly. Thorax dull violet marked with the 
usual dark stripes, the middorsal stripe is metallic black, and the one on the 
third lateral suture extends to the base of the posterior legs. Abdomen with the 
pale markings dull violet, black as follows: a basal spot on 1; a lateral longi- 
