KELLICOTT. 89 



Colors; olive, brown and fuscous. Male; front 

 olive, vertex brownish, antenna black. Thorax thickly 

 clothed with long, gray pile, ground color olive, anter- 

 ior, lateral band prominent below, humeral and ante- 

 humeral bands present, but usually very nearly obscure. 

 Legs, coxse and trochanters olive, front and middle 

 femora olive above, fuscous beneath, hind femora and 

 all the tibiae and tarsi fuscous. Wings with a basal 

 patch, often greatlj'^ reduced on the front pair, a patch 

 at nodus, sometimes wanting, and apex black. Ab- 

 domen constricted at 3, largely fuscous above; beneath 

 and on the sides yellowish brown. Superior append- 

 ages club shaped in general outline ; inferior, apical 

 fourth excised, apex very bluntly pointed. Inferior ap- 

 pendage more than two thirds the length of the su- 

 periors, widest at base, gradually narrowing to apex, 

 which is furnished with two upward directed 

 projections. 



Female similar to the male in color and form, vul- 

 var lamina nearly as long as 9, divided for its entire 

 length, the two parts divaricate, slightly curved inward 

 at apex; appendages longer than 9 + 10. 



The species is easily identified by the black mark- 

 ings on the wings, as none of our large forms except 

 some of the Libellulas have such characters. 



TETRAGONEURIA, Hagen. 



Two species of this genus have been recorded for 

 Ohio. These fly in the fore part of summer, and one is 

 very common. Small ponds seem to attract these 

 forms, but it is not unusual to find them flying over 

 running water. They are the smallest species of the 

 sub-family, Cordulinas. 



Tetragoneuria cynosura, Say. 



Length : of abdomen cJ' 30, 9 27 ; hind wing d 28, 9 

 29. 



