-i46- 
differontialis ha,s occurred. In tiro extreme southeastern part of the 
State, hatching is about 25 percent complete . Approximately 50 per- 
cent of M. nex.icanus and M. bivittatus have hatched in the northeastern 
section of the State; M. differentlalis is beginning to hatch. 
H, C. Severin and G. I. Gilbertson (May 23) ! First large hatch of 
grasshoppers* about a JiO-r^QTCQnt hatch, occurred on May 10 and 11, M. 
dif ferontialis eggs are just beginning to hatch, 
Montana. B. M, Gaddis and assistants (May 4-10 ) : First hatching of M. 
no vie anus and M, bivittatus was observed in Big Horn, Rosebud, Treasure, 
and Yellowstone Counties, in south-central Montana, during the past week. 
(May H-17)! Hatching of M. nexicanus , M. bivittatus , and M. difforent- 
ialis is reported in south-central Montana; in some areas of Yellowstone 
County an estimated 50-percent hatch has occurred. M. bivittatus is 
the dominant species, with most of then in the second instar. Light 
hatches arc reported in north-central Montana and a slight amount of 
damage to wheat crops is reported in the vicinities of Shelby and 
Dunkirk, in Toole County. 
H, B, Mills (May 20 ): Hatching reported under way in Cascade, Chou- 
teau, Garfield, Petroleum, Hill, Pondera, Toole, Valley, and Yellow- 
stone Counties. Largest hatch reported from Pondera, County in the 
no rthwe stern part of the State. 
Wyoming. B. M. Gaddis and assistants (May 11-17 ) • Approximately 40 per- 
cent of the eggs of M. bivittatus have hatched in Washakie and Big 
Horn Counties in the north-central part of the State. ' 
Utah. (April 27-May 3 ) • First-instar grasshoppers arc reported present 
in small numbers in the following counties* Iron, 3 £ aver , Millard, 
Juab, in the western part of the State and Utah in the central part 
of the State. A light and general hatch is now occurring in many 
localities. Populations up to 10 per square yard can be found nJLong 
weedy field margins and fence rows on tlio drier bench lands of Utah 
and Juab Counties. A small portion of the nymphs have reached the 
second instar, (May 4-10 ) : The beginning of a general grasshopper 
hatch was observed, in southeastern and south-central Utah during the 
week. Populations of 5 per square yard were found, in alfalfa fields 
in Grand, Emery, and San Juan Counties. M. nexicanus and M. bivitta- 
tus were the predominant species. Slight leaf damage has occurred 
along margins of alfalfa. (May 11-17)5 Weather conditions were gen- 
erally unfavorable for grasshopper development in the .central and 
■ northern parts of the State last week. On bench-lands and. foothill 
areas of Salt Lake, Davis, Weber, Box Elder, and Cache Counties, first 
instar M. nexicanus nymphs are present with populations ranging from 
3 to 6 per square yard. There is no evidence of crop damage, 
• G. F. Knowlton and assistants (May, 194l):_ First-instar grasshoppers 
• were found in Iron, Beaver, Millard, Juab, and Utah Counties, in the 
western' part of the State, on May 3* By 'May 10 hatching over most of 
• the State was general but light, nymphs being mostly in the first and 
