AGKIONID^. 589 



Sub-fam. 1. CALOPTERYGIN^E. 



Calopteryginao, De Selys. 



A. 



Arculi sectores duae apud ejus medium incipientes. Quadrila- 

 teralis fere regularis. 



a. 

 Venulae costales et subcostales numero fere aBquales. 



a. 



Epistoma non prominens. Abdomen longum, gracile, cylin- 

 dricum. 



aa. 



Pterostigma nullum vel brevissimum. Quadrilateralis sat 

 reticulata, spatio basilari longitudine aequalis. 



Div. 1. CALOPTERYX. 



Quadrilateralis antice recta vel fere recta, lateribus aequalibus. 



Calepteryx, Leach ; Steph. ; Burm. 

 Calopteryx, Ramb. ; De Selys. 



Genus 1. CALOPTERYX. 



Antennarum articulus lus cylindricus, 2o multo brevior. Alae 

 quatuor unicolores ; sectores omnes simplices, non ramosae. 



Labium lengthened, deeply severed into 2 narrow obtuse divi- 

 sions : labial palpi very slightly covering the mouth, with the 

 penultimate joint shorter or not longer than the labium, notched at 

 the tip, prolonged into a point inwardly where it bears a long spine ; 

 last joint delicate, flattened, shorter by half than the preceding, nar- 

 row, slightly bent : eyes very remote : abdomen much longer than 

 the wing ; upper appendages of the male varying but little, formed 

 like rounded pincers : legs very large, fringed with long slender 

 hairs : hind-border of the wings prolonged even to the base ; reticu- 

 lation very fine and very close, quite unvarying ; humeral part form- 

 ing less than half but much more than one-third of the length of the 

 wing ; pterostigma anomalous, only appearing in the female, or 

 obsolete, or also appearing a little in the male. 



3 F 2 



