168 The Ohio Journal of Science [Vol. XXI, No. 5, 



"on the moist places of the shore" (Muttkowski, '18) and "it 

 may occasionally descend into the water," the assumption 

 evidently being that this form normally lives out of the water 

 as an adult. The single beetle obtained in the present survey 

 was submerged in several inches of water, clinging to the 

 rough bottom of a large, flat stone at station 7. Search failed 

 to disclose any more elsewhere along this pond, or anything 

 which could have been its larval form. 



Family DascyUidce. 



Scirtes tibialis Guer. The larva of this beetle, which feeds 

 on duckweed (Kraatz '18) should evidently have found the 

 small pond an ideal habitat. The reason for their scarcity was 

 not clear. They were so few and so scattered that it must be 

 rated as rare. 



NON-AQUATIC FAMILIES. 



There were furthermore secured, whether on the surface or partly 

 submerged, a number of other beetles of purely terrestrial kinds. They 

 are mentioned here in order to complete the list of species collected, 

 but are not considered among the aquatic forms in the table. 



Olibrus consimilis March. (Phalacridce). One adult was taken 

 from on the water surface or overhanging grasses. The larva may 

 have fed on Bidens. 



Melanophthalma disfnguenda Com.* (?) {Lathridiidce). This 

 specimen was taken close on the shoreline in vegetable debris at 

 station 3. 



Family ChrysomelidcB. 



None of the aquatic members of this family were found ; but 

 several terrestrial beetles were there by accident. 



Longitarsus testaceus Melch. One of these beetles was taken from 

 aquatic plants near shore. 



Chaetocnema ectypa Hornf (?). One of these beetles was found in 

 the same sittiation. 



Chalepus dorsalis Thumb. One of these beetles was also found in a 

 similar situation. 



Suborder Rhyncophora. 

 Tanysphyrus lemnae Fab.| This was the only aquatic 

 species of snout beetle found here. Only three specimens were 

 secured, from Lemna, but as they would be easily overlooked, 

 they may have been fairly numerous at times. 



* Identified by Mr. H. C. Fall, 

 t Identified by Mr. C. W. Leng. 

 X Identified by Mr. C. W. Leng. 



