12 University of Michigan 



distal thickened antenodal the fourth in the right front wing 

 and in the left hind wing, if the antenodals of the first series 

 alone are counted; if the second series are counted the distal 

 thickened antenodal is always the fifth, the basal antenodal of 

 the second series, proximal to the proximal thickened anten- 

 odal, not being counted in any case. 



Femora dark above, for the full length on the first, for the 

 apical three-fourths or more on the second, and the apical 

 half or less on the third, shading out basally on the second and 

 third; first femora beneath yellowish or greenish, second and 

 third beneath and above basally leaden blue; ventral surface 

 of all femora with similar numerous small black spines, uni- 

 formly distributed but not forming transverse or longitudinal 

 lines; all the tibiae sharply four-angled in cross section, the 

 ventral (inner) surface sharply black, the color surrounding 

 the row of relatively long spines along each edge bounding the 

 ventral surface ; the other three surfaces of the tibiae pale 

 greenish or yellowish, the angles marked by closely set minute 

 black spines; tarsi black, the second joint of the tarsi of the 

 third legs with the dorsal (outer) surface yellow ; claws similar 

 to Cyanogomphus conchinus. 



First hamule black; second haniule greenish, a constricted 

 black bar across it at about one-third its length ; the apical 

 fourth black, darkest at apex, shading out basally ; seminal 

 vesicle black. On the second hamule there are short hairs only 

 on the basal half and no hairs or tufts on the bare apical half 

 as contrasted with Cyanogomphus."* On the posterior and 

 inner surface of the auricle, not visible in a lateral view, are 

 six or seven small black denticles in two rows. 



Superior appendages in dorsal view simple, concealing the 

 inferior, similar in outline to the same parts in ventral view. 



= Entomological News, Vol. XXVII, April, 1916, plates VIII and IX, pp. 

 167-172. 



