Catalogue of the Odonata of Ohio. 



213 



Dr. Paul Fischer has pointed out an instance happening in 

 Columbus, which appears to show that in this species, at 

 least, images mature from eggs laid the same season.* An 

 excavation for a ''lake" in Franklin Park was made, where 

 formerly there had been no water, during the Winter. Early 

 in Ma) r the lake was filled from the water works pipes ; late 

 in August large numbers of Anax Junius crawled out of their 

 nymph cases along the banks of the lake. Dragonfly nymphs 

 are rarely seen in the water supply. 



45. Macromia tveniolata Ramb. 



Toledo, July 31, 1S94. Xot uncommon along the Maumee, 

 above the city. I found it much more difficult to approach 

 and capture than the next. 



46. Macromia illixoiexsis Walsh. 



Columbus, Sandusky, Toledo, Georgesville. About San- 

 dusky Harbor and on Johnson's Island, in July, the}* were 

 common, especially so, flying in an open wood; man}' pairs 

 were seen at rest high up among the foliage. 



This species prefers. to remain about streams flowing over 

 rocks and pebbles. The female oviposits in such places, and 

 may be seen skimming the surface, scarcely distinguishable 

 from the male by her flight, save as she now and again touches 

 the water to deposit her eggs. 



Didymops transversa Say. is surely quite regional. It is 

 known in Michigan and in Kentucky. It remains to be taken. 



(6.) CORDULIX.E. 



47. Epicordulia prixceps Hagen. 

 Throughout the State. Common. From nymphs. 



48. Tetragoxuria cvxosura Say. 

 Columbus, from nymphs. Ohio ( Hagen). 



: ' Ent. Xews, Vol. II, 179. 



