THE CANADIAN ENTOMOLOGIST. 345 



LIST OF THE DRAGONFLIES OF CORUNNA, MICHIGAN. 



BY D. S. KELLICOTT, COLUMBUS, O. 



Corunna is the capital of Shiawassee County, in the central pirt of 

 the Lower Peninsula, and approximately in 43° north latitude. The 

 town is situated on the Shiawassee River, which traverses the county and 

 enters the Saginaw, as a chief branch. At present there are very few 

 permanent small streams and ponds in the vicinity, but a milldam across 

 the river at the town causes sluggish, deeper water for a mile or more. 

 This stretch of water is locally known as the 'Pond." It abounds in 

 aquatic life, thus affording the most favourable conditions for the nymphs 

 of the "snake feeders." The collections on which this list is based were 

 made about this "pond," and for a mile along the river below. Tlie time 

 of collection extends from June to September, and I feel confident that 

 few species remain undiscovered. The list, therefore, fairly represents the 

 Odonata of a favourable inland locality in Central Michigan. 



It has occurred to me, again and again, how restricted many species 

 are in their flight. In consequence, an abundant species of a given dis- 

 trict may be wholly overlooked by the collector, if its special habitat is 

 not discovered. For example, certain species occur almost exclusively at 

 the "pond," others by the river, whilst still others are equally common in 

 either situation. Thus, the emerald-eyed Macromia Illinoiensis is num- 

 erous about the rapids of the river, but is seldom seen at the •' pond," 

 whilst Libellula incesta is common at the latter, and as rarely seen by the 

 former. Other illustrations will be given in notes under the several 

 species. 



The systematic arrangement followed is that of Philip P. Calvert, in 

 the '^Catalogue of the Odonata of Philadelphia^ The specimens are in 

 the collection of the Ohio State University. 



Galopteryx, Leach. 



Maculata, Beauv. — Common in former years along the river and 

 small streams. It is now seldom seen, owing, I think, to the draining of 

 morasses and ponds, and the consequent drying up in summer of the 

 meadow brooks. 



Apicalis, Burm. — Rare, about the river. 



Het/Erina, Hagen. 



Americana, Fabr. — Exceedingly abundant in August, by ih^ river, 

 especially where it flows rapidly over beds of bowlders and the margins 

 are overhung by the long, coarse tussock grasses and the silvery sprays of 

 the willow. 



