ODONATA 383 



margin, its free edge brown; maxillae and labium pale blue or green, 

 more or less tinged with brown, especially at their apices; vertex 

 black at base, the elevated portion emarginate anteriorly, pale yellow 

 or blue; occiput pale yellow, its hind margin straight; rear of eyes 

 black. 



Thorax pale brownish, each side with two oblique pale blue stripes, 

 beneath with some black spots; mid-dorsal thoracic carina, humeral 

 and second lateral sutures blackish. Legs black, coxse and bases of 

 femora brown, anterior femora pale brown or luteous beneath. 



Abdomen with segments i and 2 inflated, 3 constricted before the 

 middle, remaining segments subequal in width; brown, marked with 

 blue or green as follows: all of i, except a posteriorly-emarginate 

 basal spot on the dorsum ; sides of 2, except some dark spots inferiorly ; 

 apical portion of dorsum of 2, except transverse median carina and 

 posteriorly a line on each side parallel to it (the basal brownish area 

 on this segment reaches this carina at its middle) ; sides of 3 anteriorly ; 

 a transverse band on the apex of 3-9, interrupted at the longitudinal 

 median carina ; a transverse spot on the middle of 3-8, also interrupted 

 at the carina, large on 8, small on the other segments ; sides of 3-8 

 each with three consecutive spots, sometimes indistinct, sometimes 

 large and more or less coalescent, the posterior spot uniting with the 

 apical dorsal band; a dorsal spot covering apical two-thirds of 10, 

 and some apical spots. Sternum of r with an acute, prominent tuber- 



FiG. 29. ^dEsc/i/ia galapagoensis. Right side of loth segment and 

 appendages. 



cle which is beset with short spines and long hairs. Auricles of 2 

 bidentate. A mid-dorsal, basal, keel-like tooth on 10 as in californica 

 and cornigera^ but with three parallel, smaller ones each side; apical 

 margin of 10 somewhat denticulated, this segment a little wider than 

 long. 



Superior appendages as long as, or a little longer than, 94-10, 

 slightly recurved, their bases slender; basal fourth narrow, then 



