206 The Ohio Journal of Science [Vol. XX, No. 6, 



Drake,! Gerris riifosciitellatus Latr. and G. conformis Uhl. The 

 size of the wing-pads in the short winged form of M. brunnea 

 are very valuable. About the middle of July Gerris remigis 

 Say became rather scarce upon Mirror Lake, but two or three 

 days later many long winged forms had immigrated to the 

 lake. These alate forms began to slowly disappear and in less 

 than two weeks they had all migrated to new waters. A 

 number of other records were recorded for the migration of 

 G. rufoscutellatus, G. conformis Say, G. remigis, G. marginatus 

 Say, G. buenoi Kirk., Microvelia hinei (n. sp.), M. borealis 

 Bueno to Mirror Lake and other ponds in the vicinity of 

 Columbus. Gerris canaliculatus, G. conformis and M. hinei 

 n. sp. seems to have only visited Mirror Lake occasionally and 

 did not breed there during the summer. One specimen of 

 G. marginatus was captured "in flight" along the south bank 

 of the lake during the fore part of June. The writer also 

 observed the notonectid Notonecta undulata Say, leave the 

 water and migrate by flight from Mirror Lake. It was during 

 the middle of May and the insect was captured by Mr. De Long 

 and the writer as it was flying away from the lake. 



A more detailed report upon the aquatic and semiaquatic 

 Heteroptera will appear in a subsequent paper. A complete 

 bibliography relating to the Hemiptera of Ohio has been 

 published by Osborn and Drake in "Additions and Notes on 

 THE Hemiptera-Heteroptera of Ohio," Ohio Journal of 

 Science, Vol. XV, pp. 501-508. 



Velia stagnalis Burmeister. 



Six specimens, all apterous; Sandusky Bay, Lake Erie 

 (legit V. R. Haber) ; Rockbridge (legit A. J. Bassinger). This 

 Species has been reported from Ohio, Pennsylvania, District of 

 Columbia, North Carolina and the West Indies. It breeds in 

 stagnant water. 



Microvelia fontinalis Bueno. 



Two examples, collected on Lake Abram, near Berea, by 

 the writer. The macropterous form is unknown. The Veiling J 

 of the Atlantic States have been carefully studied. 



t Drake, Carl J., Florida Bug<^ist, Vol. Ill, No. 1, p. 2, 1919. 



t Bueno, J. R. de la Torre, Bui. Brookl. Ent. vSoc, Vol. XI, pp. 52-61, 1916. 



