64 DRAGOXFLIES OF OHIO. 



lobe. Thorax light olive, black, marked as follows ; 

 stripe each side the carina not forming a collar, an ante- 

 humeral and humeral well separated, a line in front of 

 the stigma and the upper part of the second suture ; 

 the legs are black j-ellow as follows ; inside of femora of 

 first pair, narrow stripe on external side of tibice of all 

 pairs; wings with costa olive, pterostigma yellow. The 

 abdomen is black with olive dorsal band on 1-7, Sand 9 

 all brown lighter on the sides, moderately dilated, sides 

 of 1-7 more or less oli e, 9 yellow including the 

 appendages. 



The superior appendages are as long as 10. divar- 

 icate wide at base, tapering, outer apical angle rounded, 

 inner produced into a long, black tipped spine set 

 obliquely inward; in profile greatly curved, apical third 

 directed obliquely upward. Inferiors with spreading 

 apexes blackish, curved up at apex. 



Female differs in being stouter and a little larger 

 and in having more yellow on the sides of the abdomen. 

 In one specimen the spine on the occiput is quadriden- 

 tate above, the same organ in some males shows two 

 similar teeth, while in others it is simply acuminate. 

 The vulvar lamina is triangular, one third as long as 9 

 with the apex two parted, contiguous. 



The species is on the wing at Columbus during the 

 latter half of Alay and the first part of June. 



Gomphus furcifer, l-fagen. 



Length : of abdomen c? and ? 36, hind wing 30. 



Colors black, olive, brown and yellow. Male, occi- 

 put very slightly convex, olive and fringed with black 

 hairs, rear of head yellow below, black above, whole 

 face olive, mandibles and vertex black. Prothorax 

 with an irregular , yellow spot near the front margin, 

 posterior to this a lateral spot each side and two gemi- 

 nate spots on the vertex olive ; mesothoracic carina 

 olive bounded each side by brow^n which in some 



