82 Psyche [June 
MESOVELIA MULSANTI—A HISTORY OF A FEW ISOLATED REARINGS. 
: &0 
Exp. Lot.| Egg = Ist 2d 3d 4th 5th Eggs z 
No. No.| laid. Sy = molt. | molt. | molt. | molt. | molt. |Mated.| laid. © | Died. 
Bo. s 
168deeen - 1643|7/ 5/16|7/13/16}7/18/16|7/19/16}7/22/16|7/24/16)7/27/16|7/29/16}7/30/16) 26 |8/ 5/16 
GAS Ee Rei 1643|7/ 5/16|7/13/16)7/16/16|7/19/16|7/22/16)7/24/16 7/26/16 fof Pallet ene cro een o0/L6 
1OSSz pee: 1643]}7/ 5/16}7/13/16|7/15/16)7/16/16|7/19/16}7/22/16|7/25/16] . 9 |7/28/16| 15 |8/ 2/16 
16142... . .|1657|7/13/16]7/21/16}7/23/16|7/25/16|7/27/16)7/29/16|8/ 1/16 Q |8/ 4/16} 21 |8/ 9/16 
NGKeR eee ....|7/24/1618/-1/16|8/ 3/16|]8/ 6/16)8/ 8/16)8/11/16}8/14/16 (otMin |e BBG oa 8/22/16 
l6y ......|....|7/13/16|7/21/16}7/23/16|7/25/16|7/27/16)7/29/16|8/ 1/16 fof Petia ..../8/ 7/16 
iV eeeste 1657|7/13/16|7/19/16|7/21/16)7/23/16|7/26/16|7/29/16|7/31/16 QU ish ceete cor: se. ol/16 
165 7laeeee 1657|7/13/16|7/20/16|7/22/16|7/24/16|7/26/16|7/29/16|8/ 1/16|8/ 4/16|8/ 9/16] 10 |8/ 6/16 
WON e o.5e ....|7/13/16}7/20/16|7/22/16]7/25/16}7/27/16|7/29/16|8/ 1/16|8/ 3/16|8/ 4/16) 44 |8/12/16 
SUMMARY. 
Mesovelia mulsanti is found about the margins of ponds and 
pools upon floating vegetation where it feeds upon small organisms 
coming to the surface film from below or that fall upon it. The 
species probably passes the winter as adults that begin ovipositing 
in the spring. They place their eggs in the stems of plants and 
even in the spongy wood of floating logs.!. There is a succession of 
generations throughout the season, each cycle requiring about 
twenty-four days. Winged and wingless forms occur together. 
Besides flying from pool to pool, they may be transferred in the 
egg stage. Mr. Beamer sent them from the southern part of the 
state to the writer at Lawrence, Kans., in the stems of sedge used 
as packing for some Naucorids. 
The general distribution of this species, and the ease with which 
it may be controlled and observed both as to oviposition and to 
hatching, make it a valuable object for studies on these phases of 
animal behavior. 
1Since this paper was submitted for publication the writer has learned from Mr. J. 
R. de la Torre Bueno that he found the eggs of these bugs in plants some years ago. This 
gives him priority of observation on this point. 
