1955 ] 
Gibbs — Females of Enallagma 
13 
Head: Dorsum black; pale frontal margin not quite 
reaching bases of antennae; postocular spots comma- 
shaped, isolated from the light occipital carina, not quite 
reaching ocular margins; face pale except postclypeus 
black and pale lateral edges; mouthparts and rear of 
head pale; antennae black, apices of first and second seg- 
ments pale. 
Prothorax: Front lobe pale bordered with black; middle 
lobe black dorsally, pale laterally, a dorsolateral pale spot 
either present on each side and variable in size, or absent, 
and a pair of prominent dorsolateral pits present near 
the caudal margin; hind lobe black with pale lateral mar- 
gins, caudal margin convex and entire. 
Pterothorax: Pale with black middorsal stripe occupying 
slightly more than half the mesepisternum, somewhat 
narrowed posteriorly; humeral black stripe slightly wider 
than the pale antehumeral stripe, widened at the mesin- 
fraepisternal suture, narrower on the mesinfraepisternum ; 
first lateral stripe absent or a mere vestige; second lateral 
stripe a fine line on the metapleural suture, widened pos- 
teriorly into a spot; middorsal and humeral stripes con- 
nected posteriorly by the black of the antealar carina and 
sinus, which continues laterad to the region of the first 
lateral stripe. Coxae and trochanters entirely pale. Femora 
and tibiae pale, each with a wide black lateral stripe cov- 
ering most of their lateral surface; tarsi pale, each with 
tip of third segment dark; spines of legs black; claws 
pale with black tips. 
Mesostigmal laminae: Mesal edge at about a 30 degree 
angle to middorsal carina; mesal half much wider than 
lateral half ; postero-mesal corner much thickened ; a deep 
depression near mesal margin; anterior margin of lateral 
portion upturned; lateral end with a variable, usually 
small, light spot. 
Wings: Venation black or dark brown; pterostigma light 
brown. M 2 arises between the 4th and 5th or 5th and 6th 
postnodal crossveins in the front wings, between the 3rd 
and 4th or 4th and 5th in hind wings; postnodals 9-11 in 
front wings, 8-10 in hind wings, the majority having 
