376 gundlach's work on the odonata of cuba 



Pale antehumeral stripe narrower than the black humeral (mesopleural) 

 stripe. 



Postocular spot's linear truncatum 



Postocular spots cuneiform pollutum 



Pale antehumeral stripe as wide as, or wider than, the l)laek humeral 



stripe vesperum, signatum 



(I have not found a constant color difference between the males of 

 these two species, that given by Garman in 1917 notwithstanding, al- 

 though the bright lemon yellow of the sides of the thorax in the adult 

 males of vesperum is apparently never met in any age of signatum, 

 but younger males of vesperum do not show this bright yellow; the 

 difference in the appendages of the two species is well marked.) 

 Dorsum of abdominal segment nine black, pale postocular spots linear, not con- 

 fluent with the pale color of the rear of the head, pale antehumeral stripe 



narrower than the black humeral stripe pictum 



Females. 

 (Those of laurenti and of truttcatum, being unknown to me, are omitted.) 

 Black humeral stripe at its lower end touching the external or lateral end of the 

 mesostigmal lamina. 



Pale postocular spots linear, j^ale antehumeral stripe narrower than the black 

 humeral stripe, second lateral thoracic (metapleural) suture with a black 

 stripe on its upper two-thirds or three-fourths, mesepisternal tubercles 



present pictum 



Pale postocular spots cuneiform, wider and rounded at their lateral ends. 

 Mesepisternal tubercles present, pale antehumeral stripe as wide as, or 

 wider than, the l)lack humeral, second lateral thoracic suture with a dark 



stripe of variable length signatum 



Mesepisternal tulsereles absent, pale antehumeral stripe narrower to wider 

 than the black humeral, second lateral thoracic suture with a black stripe 



on its upper five-sixths or more pollutum 



Black humeral stripe at its lower end not touching the lateral end of the 

 mesostigmal lamina, pale postocular spots cuneiform, pale antehumeral 

 stripe wider than the black humeral, second lateral thoracic suture with a 

 black stripe on its uppermost fourth or fifth only, mesepisternal tubercles 

 present but variable in size vesperum 



Enallagma truncatum Gundlach (Plate XXXIII, figs. 1, 12, 13; plate 



XXXIV, figs. 24, 25.) 

 Agrion (Enallagma) truncatum Gundlach, Contrib. Ent. Cub., ii, 226, 1888. 

 (Reprinted antea, page 353). 



cf . Superior appendages in profile view, with the apical margin twice as 

 long as the inferior margin and convex in the middle of its length with a slight 

 concavity above and a slighter one below the convexity; in dor.sal \'iew, the 

 intero-inferior lamella not reaching to the level of the supero-internal sub- 

 apical hook. 



Nasus (post-clypcus) shining black, two transverse lin(>ar streaks on the 

 disk and anterior and lateral margins narrowly orange. 



P'rons: pale color of its anterior surface not attaining the median ocellus; 



