66 DRAGOXFLIES OF OHIO. 



may be seen ou the under side ; inferiors shorter than 

 superiors, divaricate and turned up at tip from side 

 view. 



The female differs in having the tenth segment 

 wholly yellow, the legs, front pair femora yellow below 

 and blackish above, middle femora the same, hind 

 femora j^ellow except at apex, the coxae and trochan- 

 ters of all the legs yellow. Vulvar lamina short, not 

 more than a fifth as long as 9. t riangular. divided, the 

 two lobes separated with their apexes rounded. 



This species is common in all parts of the state in 

 the latter part of May. Jmie. and fore part of July. 

 It has been taken at Columbu;; as early as May 9th. 

 Canals and ponds are its favorite resorts. 



Gompbus lividus, Selys. 



Length of abdomen d 34-36, ? 36, hind wing d 

 30-32, 9 34. 



Colors fuscous, olive and yellow. Male, occiput 

 convex, ciliated with black hairs, face yellow, vertex 

 and antennae fuscous, rear of head olive, largely over- 

 laid with brown. Prothorax fuscous, front border, a 

 posterior, geminate spot and a spot each side olive ; 

 thoracic carina fuscous narrowly margined each side 

 with the same color, humeral and autehumeral bands 

 fuscous obscurely divided for part of their extent by 

 olive, space between the first and second lateral 

 sutures fuscous, as is an oblique band on the posterior 

 margin of the thorax ; legs fuscous with the superior 

 side of all the tibiae and hind metatarsi marked with 

 olive ; wings, costa olive, pterostigma yellowish 

 brown. Abdomen, dorsal band present on 1-9, this 

 band is abbreviated on 5-8, on 9 it is wide and con- 

 tinuous ; sides of 1-2 and 8-9 olive below, basal spot 

 on 3-7 ; superior appendages brown, nearly one and a 

 half times as long as 10, divaricate, widest at base, 

 gradually tapering, outer distal angle has the appear- 



