106 DRAGONFLIES OF OHIO. 



outer part of the triangle. In addition the hind wings 

 have a nearly round spot before the anal angle. The 

 abdomen is uniform black in all specimens before me, 

 but I should suppose that in teneral specimens it might 

 be otherwise. 



The female has the extreme apex of all of the wings 

 hyaline. The extremity of the distal process of the 

 basal patch in the hind wings is separated from the 

 main part in one specimen and exists as a separate 

 spot. The spot before the anal angle is reduced in all 

 my specimens, and in one specimen is very small. The 

 front is yellowish and the abdomen has a dorsal band 

 in the form of triangular spots on segments 2-8 ; 

 various yellow markings are present on the sides of the 

 abdomen in a teneral specimen but are absent in a 

 mature specimen. 



The species seem to prefer small lakes where the 

 water is clear. Six specimens were taken in Summit 

 County along the shores of Silver and Summit Lakes 

 in June and July. June 23 was the earliest date that 

 specimens were taken, at this time the females were 

 teneral, but the males had full colors. Their actions 

 in the field are like those C. elisa. 



LEUCOi;HINIA, Brittinger. 



This genus contains only one Ohio species. 



The pterostigma is short and broad, not more than 

 twice as long as broad, the wings are yellowish and 

 black at base. The species is a common one and like 

 other members of its family is attracted to strgmant 

 ponds. 



Leucorhinia intacta, Hagen. 



Length : of abdomen o 71 23, 9 21 ; hind wing c? 24-26, 

 ? 25. 



Male, front white, labrum yellowish, labium black, 

 brownish on the sides ; rear of eyes black, feet and 



