Catalogue of the Odonata of Ohio. 



20 1 



dant about the borders of a shallow, almost land-locked bay. 

 in which Nymphaea, Sagittaria, and Scirpus were luxuriant. 

 In the early part of the day the sexes were taken among 

 these aquatics, by wading out a distance from shore. In the 

 afternoon of the same day many, especially females, were 

 captured in an open forest along the bank of the lagoon men- 

 tioned. 



The adult female may be described, briefly, as follows : 

 Length of abdomen, 37 mm.; of inferior wing, 26-28 mm.; 

 width of head, 5 mm. Pterostigma yellowish-brown, cover- 

 ing two and one-half to three cells ; post-cubitals on the 

 anterior wings, four and one-half. The head is metallic green 

 in young examples, dark to black and pruinose in old ones, 

 pruinose in the rear; labium, gena, and labrum yellowish, 

 the last two not olivaceous, as in the male ; all brownish in 

 dried specimens. Thorax, dorsally, metallic green with mid- 

 dorsal line and a narrow humeral stripe yellowish ; sides 

 below and venter yellowish, pruinose in mature ones, above 

 green to the base of hind wings; coxae, trochanters, and 

 femora inwardly yellow: tibiae and tarsi black. Abdomen, 

 dorsally, metallic green with mid-dorsal line more or less dis- 

 tinct on 2-4 ; narrow basal yellow rings scarcely interrupted 

 on 2-7; sides yellowish; sternum blackish, pruinose with 

 age ; 10 yellowish, with a rounded sinus in the posterior dor- 

 sal edge, its angles marked by a cluster of three or four teeth ; 

 appendages more than half as long as 10, pointed, bright 

 yellow; valves black at base, yellowish apically ; serrate, 

 valvular spines black, varying much in color with age. 



10. Lestes inequalis Walsh. 



Sandy Beach, July 4. Rare. Taken in the same situations 

 as L. vigilax, which it superficially resembles. The males 

 are, of course, readily separated by the slender inferior 

 appendages, which are longer, in Inequalis, than the superiors ; 

 the females are also easily distinguished as follows : Rear of 

 head of Inequalis yellow, of J igilax dark ; the pterostigma 

 is darker in the former and covers only two cells or a little 

 more, in the latter two and a half to three ; the mid-dorsal 



