INSECT PEST SURVEY BULLETIN 
Vol, 20 
June 1, 1940 
No. 4 
THE MORE IMPORTANT RECORDS FOR MAY 
Grasshoppers developed rapidly during the month in the southern part 
of the infested territory, hut hatching and development were delayed hy 
inclement weather in the northern part. In California and southern Arizona 
Melanoplus mexicanus Sauss. is doing considerable damage, and in scattered 
localities over the entire area it is doing some damage. In the southern 
part this species is reaching the adult stage and is mating. In the eastern 
parts of Colorado and New Mexico, the area infested hy Dissosteira longi ~ 
pennis Thos,, the hatch was almost complete hy the middle of the month; 
however, the weather somewhat delayed development and activity. The hatch 
of M. hivittatus Say was half completed hy the middle of the month in 
Colorado and just started at this time in northwestern Iowa, southeastern 
Nebraska, and in Minnesota and the Dakotas, By the 25th pf the month hatching 
was occurring generally over the area and in Sheridan County, Wyo, , where 
this is the predominant species, hatch was half completed, M. differential! s 
Thos, had almost conpleted hatch in Arizona hy the middle of the month and 
hy the 25th it was causing some injury. The species was hatching in Colorado 
and the Panhandle of Nebraska hy the 25th of the month. Hatching had not 
started at this time farther north, Camnula pellucida Scudd. is abundant 
in Orange County, Calif,, and Sanpete County, central Utah, 
The Mormon cricket has'hatched throughout the infested territory. 
Migrations have started in some places. In Wasco County, Oreg. , and 
Franklin County, Wash,, mating and egg laying have started. Light infesta- 
tions occur in south-central South Dakota and the Panhandle of Nebraska, 
Reports of injury hy cutworms were received from scattered localities 
over the country. Considerable damage to cotton occurred in the lower Rio 
Grande Valley of Texas, The pale western cptworm occurred in outbreak 
form in western Kansas, through the Texas Panhandle and in eastern New 
Mexico, The variegated cutworm is occurring in the San Francisco Bay area 
of California, 
The armyworm occurred in destructive numbers in central Oklahoma ^ring 
the first half of the month. Larvae were collected in two counties in north- 
western Mississippi the last week in April, hut no damage was reported. 
Heavy flights of May beetles occurred over the northeastern quarter of 
the country. Trees are being defoliated in some places. Damage to cotton 
hy adults was reported from one county in Texas, 
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