ENALLAGMA 333 
A very attractive dark blue and black damselfly found commonly, especially 
near rivers and streams. Male. Face blue. Base of labrum brown or with a black 
spot. Postclypeus entirely black, or black with two lateral blue spots. Blue 
transverse frontal band reaching to the basis of the antennae. Vertex, antennae 
and the remainder of the frons, black. Pale postocular spots narrow and ir- 
regular, connected with, or very narrowly separated from, the pale occipital 
stripe. Dorsum of the prothorax black, blue as follows: a large median and two 
small lateral spots on the anterior lobe; a paired median and two large lateral 
spots, and the sides of the middle lobe; and median and lateral spots or lines 
on the posterior lobe. Black middorsal thoracic stripe wide, antehumeral pale 
stripe narrower than either the middorsal or the humeral dark ones. The 
humeral black stripe is often split longitudinally near its caudal end, leaving that 
part of the humeral suture pale. A short black stripe on the second and third 
lateral sutures at the upper end. Wings with a brownish tinge. Abdomen with 
dorsum of segments 1-8 and 10 entirely metallic black, except for basal rings 
on 3-6.9 entirely blue. Superior appendages shorter than 10, bifid, the upper 
arm shorter than the lower, no clear tubercle between them and both produced 
on the same plane, i.e., the long axis of the lower arm is parallel to the long axis 
of the upper arm, and not at angles to it. 
Female colored pale green and black or brown. Abdomen with broad black 
dorsal stripes on segments 1-8, the one on 9 being reduced to a triangular spot 
at the base. Remainder of 9 and all of 10 blue. 
Le LL 
ebrium ‘ exsulans weewa pallidum 

328. Enallagma weewa Byers 
Byers ’27, p. 385. 
Length 38 mm. Expanse 42-46 mm. S. C., Ga. and Fla 
Male. Color in dried specimens, light tan and metallic greenish-black, becom- 
ing violet-gray pruinose in old specimens. Mouth parts, genae, postgenae and 
occiput, pale. Mandibles pale with a black basal spot. Basal half of the labrum 
and of the postclypeus, black. Pale transverse frontal band narrow, hardly 
reaching the basis of the antennae. Vertex, antennae and the remainder of the 
frons, black. Pale postocular spots linear, narrowly joined, or separated from the 
pale postocellar stripe, not connected with the pale color of the rear of the head. 
Prothorax predominantly black, most of the anterior lobe, the sides, a pair of 
lateral spots, a dorsal twin spot of the median lobe, and the posterior margin 
of the hind lobe, pale. Thorax with the middorsal carina broadly brown, 
separating the usual wide middorsal dark stripe into two narrower stripes. The 
humeral dark stripe very irregular and split longitudinally in the middle of its 
length, so that almost the whole of the humeral suture is pale. The pale ante- 
humeral stripe narrow. A black basal streak on the second and third lateral 
sutures, that on tbe latter usually prolonged as a narrow line to the base of the 
