163 



lake. Though a good flier it spends most of its time alighted on some weed 

 or fence. A niale of Var. (issimilatiim IJhler was taken July 'iO, 1900, by 

 Mr. Cyrus Rutor. 



35. Syinpt'triDii obtnt.'^um (Hagen). 



One specimen, a female, taken July 13, 190<X was doulitfully referred 

 to this species by Mr. E. B. AVilliamson. This species should l)e fairly 

 common. 



36. Sympctriim ricinitiit Hagen. 



Two females were taken during the summer of 1900, one by Dr. J. R. 

 Slonaker, and one by the writer. 



37. Symprtnim covniptnra (Hagen). 



"Near AVinona Lake, August 10, 1901, one male. Miss N. O. Harrah."* 



38. Mesodieiiiia ximpltrirollix (Say). 



Common during the entire summer over the lily beds, along the sandy 

 shores and over the sloughs and swamps. 



39. P-dcltjidiplax Ionglpeimi>< (Burmeister). 



(Jenerally associated with Md'sotheiuis siniiJlicicoHis. but very much 

 less abundant. 



40. Libelhdd ha}«(ll.'< Say. 



This is the most conspicuous species of dragonfly about the lake, and 

 of the larger forms the most abundant. It is found everywhere over the 

 meadows and swamps, along the shores and over the lily l)eds. 



41. LilifUiila lin-t'xta Hagen. 



Seldom. One male was taken on the lily lied at the outlet, July 28, 

 1900. Another was seen earlier in the season flying slowly ui) and down 

 Cherry Creek. 



42. LihelhtJa cijanea Fabricius. 



Occasional. Associated with MesofJiriiiix xiuiplicicoUis and PacJnj- 

 diplo.r loiH/iixiinis over the lily beds. 



43. LlhiHnU, i„ilrheJk( Drmy. 



Next to fjlirJIiiln hasalis this is the most abundant of the larger species. 

 Common in nearly all situations. 



44. Flathcmis h/did (Drury). 



This species is common about the drain ditches in the fields south of 

 the lake. An occasional specimen is seen near the mouth of Cherry Creek. 



A Tnunrit. either Carolina or oiiiista. was seen in lODl several times aliout 

 the laboratories. Also in the field just back of Chapman Hill a J'aiitala, 



AVilbaniPon.'Proceedings InJiaiia Academy of Science VM, p. 120. 



