2 IO 



Cincinnati Society of Natural History. 



The thorax has the dorsum dark brown with a mesothoracie 

 collar, a short, broad stripe each side and an ante-humeral ray, 

 spatulate above, olive ; sides paler, with an olivaceous stripe 

 beneath each wing, olivaceous below ; wings hyaline, veins 

 and costa black, pterostigma reddish-brown, 5 mm. long; 

 membranule very narrow, whitish ; legs black. 



Abdomen black, 8 and 9 strongly dilated, 9 almost as long 

 as 8-fio; i, 2, 8 and 9 olivaceous on the sides, 1-8 with dorsal 

 yellow spots as follows : 1 , apical, triangular ; 2, lanceolate, 

 nearly the entire length ; 3, 4, 5 and 6, basal, oblong; 7 and 8, 

 basal triangular; appendages black, divaricate, superior, 

 longer than 10, acute, depressed, slightly turned up at apex 

 and having eight or ten minute crenulations on the lower 

 outer edge apically, inferior not quite so long, hamulate at 

 apex. 



35. Dromogomphus spinosus Selys. 



Columbus, along the Scioto and Olentangy rivers (Paul 

 Fischer). It appears not to be common, at least in central 

 Ohio. In central Michigan, from July 15 to August 1, I have 

 found it common. 



The female was several times noticed ovipositing in a man- 

 ner similar to Macromia illinoiensis, that is, by skimming the 

 water and every few feet or rods touching the water with the 

 abdominal tip without scarcely checking her speed ; at other 

 times I have seen them drop dowm from an overhanging tree 

 and repeatedly tap the water, remaining in one place after the 

 manner of Libellula. Pairs w T ere noticed to fly up into tree 

 tops and remain in union for a considerable time. 



36. Dromogomphus spoliatus Selys. 



Toledo, July 31, 1894, two males were seen and one of 

 them captured ; they were flying among the phenomenal 

 stretches of Nelumbium of the Maumee. 



The occurrence of this species in Ohio, hitherto reported 

 only from Texas, w 7 as a gratifying surprise. I at first sup- 

 posed it was D. armatus (Georgia), but it appears to be 

 Spoliatus, for reasons as follows: 1. The face is wholly yel- 



