Lake Maxinkuckee, Physical and Biological Survey 21 



cross-country ditches. The sexes are usually found paired and the 

 eggs are deposited in the tissues of decaying weeds and stems float- 

 ing at the surface. During oviposition the male holds his body 

 suspended in the air after the manner just described for putrida. 

 The eggs are large and dark-colored and can be easily found in 

 the decaying tissues. The violet color of the male shows up plainly 

 among the blue and red, the orange and the brown of the species 

 with which it associates, and is a distinguishing character. 

 Found in all the localities visited. 



26. ARGIA SEDULA (Hagen) 



This species is found with the preceding in the rank vegetation 

 along streams and ditches. The males of the two species can be 

 told at once by their color, violet in violacea and a deep blue in 

 sedula. The females can then be told by their association with 

 the males. The eggs are deposited similarly to those of violacea 

 in the tissues of decaying matter floating at the surface. This 

 species is not nearly so common as the preceding and was found in 

 only two localities, along the Outlet between Lake Maxinkuckee 

 and Lost Lake and at the South Inlet. 



27. ARGIA APICALIS (Say) 



This species is similar to putrida but is brighter colored and is 

 not found in similar localities, preferring the streams and rivers 

 to the open lake shore. Here it lives amid the rank vegetation, 

 venturing out only after food or for the purpose of depositing its 

 eggs. These latter, furthermore, are never deposited in the dirty 

 algse near the shore but in the clearer water some distance out. 



About 20 specimens of this species, including both sexes, were 

 taken on the Tippecanoe River in September. 



28. CHROMAGRION CONDITUM (Hagen) 



This species was found in considerable numbers at Hawk's 

 marsh in company with two species of Lestes. They seemed to 

 prefer this cool, shaded swamp, and were not seen in the open or 

 anywhere along the lake shores. They were mating and the fe- 

 males were depositing their eggs in the few pools near the center 

 of the water where any water was visible. Of necessity the eggs 

 were laid in the weeds and lily-pads with which the pools were 

 nearly choked. Several specimens of both sexes were secured. 



29. NEHALENNIA IRENE Hagen 



A very small but handsome species found in the damp vegeta- 

 tion along some stream or ditch. In addition to its small size it is 



