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CLAY-BACK2D CUTT/OEM (?^tia ?lajiaria.l : c rr.) 
Ohio H. a. Gossaxd? (May 20 ) : Kay 16 cutworms of the species Feltia 
g 1 ad i ar i a, ,y e r e received from Couth Euc] id , where they were doing 
heavy damage in hctoeds. 
PAINTED LADY BUTTERFLY (V ur.es s a carded L.) 
California E. A. McGregor: Continuing from April 11 to 13, inclusive, there 
was a remarkable migration of this butterfly. All through the day 
there was a continual f -light of these insects. Roughly it was 
estimated that there were an average of about 3^0 outterflies per 
acre at a given moment. The flight direction appeared to be from 
the southeast to the northwest, and it would seem that the source 
of the migration was either the foothills of the Sierras or the 
Sierras proper. 
In travelling, the flight was not characteristic of butterflies 
in general, but was of a more steady and purposeful nature. During 
calm intervals the flight took place on an average of perhaps 10 or 
20 feet altitude . -but during periods of windiness the butterflies 
flew very clos.e to the ground. There appeared to be no attempt 
toward pairing and the individuals flew well separated — possibly 
10 feet apart on an average. it was very noticeable that they all 
pursued their flight in the sa^e direction. It was rarely that 
individuals were seen to alight en vegetation, but this they die 3 
at tira es . 
The above flight occurred during the warmest period yet exper- 
ienced this season, temperature maximums ranging from SO to 88° F . 
The temperature suddenly dropped late on the afternoon of the 13 + h, 
accompanied by a chilly wind, and the flight as suddenly terminated. 
On the 15th the temperature rose again but a gusty wind occurred so 
that only a very few individuals could be seen migrating. 
An attempt to estimate the number of individuals comprising this 
3-day migration is here presented. The flight was established to 
be equally dense at Sunland, Porterville, Strathmore, Lindsay. 
Exeter, Vis alia, Wood lake, and Lemon Cove. This shows the flight 
to have been at least 40 miles in width( ( it no doubt was much wider) 
The daily duration of the migration was at least 12 hours, or a 
total for the three days of 36 flight hours for any given point. 
Now the rate of travel was estirated at about 12 miles per hour, 
which would give to tne flight a total dispersion length cf 432 
miles for the 3 days. Within such a zone (40 milss wide by 432 
miles long) is contained about 17,280 square miles or 11,059,200 
acres. With an estimated occurrence of about 300 butterflies per 
acre, it is readily computed that at least 3,000,000,000 had passed 
in the 40-miIe-wide zone between Sunland and Lemon Cove. 
If more data were available regarding the width of the flight, 
it undoubtedly cculd be shown that the population of this interest- 
ing migratory flight much exceeded the above estimate. 
R. E. Campbell (Kay 10): Following an extended and heavy northerly 
flight cf the painted lady Dutterfly + he hairy caterpillars began 
to appear on weeds, mostly malva, thistle, and nettles. As these 
