KELUCOTTT. 99 



between subcostal and median veins will characterize 

 the species. 



It is not a common form, but has been taken at 

 Licking Reservoir and at Columbus (R. C. Osburn) in 

 June. 



Libellula incest a, Hagen. 



Length: of abdomen c^ 35-36, ? 32-33; hind wing 

 c? 39, 9 40. 



Male, yellowish to blue pruinose according to age. 

 Teneral specimens have the front, sides of thorax and 

 abdomen yellowish. Fully matured specimens have 

 the front dark, nasus metallic superiorly, thorax and 

 abdomen uniform blue, pruinose. No nodal patch or 

 basal coloration, but some specimens have the nodus 

 very narrowly margined with fnscous on each side. 



The female retains more or less of the yellowish on 

 front, thorax and abdomen throughout life. Her wings 

 are like those of the male except they are fuscous at 

 apex. 



The clear transparent wings without nodal or 

 basal spots will serve to separate this species from all 

 others. 



This seems to be a widely distributed species in the 

 state, and in places is abundant. At Sandusky it is on 

 the wing in June and July. 



Libellula exusta, Say. 



Length: of abdomen d 25, ? 23; hind wing d 33, 

 ? 31. 



Mature male, front olive, labrum and labium 

 yellowish, occiput black, front of thorax and abdomen 

 pruinose, sides of thorax brownish, humerus darker. 

 Fore wings with two, short, basal streaks fuscous ex- 

 treme base brownish. Hind wings at base with space 

 between subcosta and median vein, and a triangular 

 spot behind submedian vein fuscous, membranule 



