« 132 ^ 
to 200 per square yard and noticeable damage to alfalfa along field 
margins is appearing. In the southwestern portion of the State 
mexicanus are -now mating and many females -are filled with fertile 
eggs, M, mexicanus are approximately all in the adult stage, while 
_M, differentialis are 50 percent first instar, 30 percent second, 15 
percent third, and 5 percenjt fourth. Heavy populations are present 
in the East Verde River and Tonto Creek areas of northern Cila County. 
W. A. Stevenson (May 11); An outbreak in the farming district of 
Marana, northeastern Pima County, discovered on May 3* Most of the 
individuals involved were the common desert grasshopper ( Trimerotropis 
pallidipennis Burm, ) . This species is not considered a serious pest 
of cultivated crops in this section of. the country. As all found were 
adults onlfey 6, it is believed that there will be no damage to Crops, 
C. D. Lebert (May 21): Several migrations of pallidipennis 
observed in Phoenix, Maricopa County, during the first week of May, 
Extremeiy abundant and annoying for several days, but no damage to 
ornamental's was recorded. 
New Mexico, B, M, Gaddis and assistants (May 12-18): In the D. longipennis 
area in De Baca, Chaves, and the Quay area of Quay County, less than 
5 percent of the original known infestation remained May l4. The 
scattered bands present were small, averaging less than 1 acre in size, 
• Ten bands found on May I3 averaged less than 5 acres in area. Popula- 
tions in the bands average about 5OO P®*“ sq^uare yard. In the Ima school 
-area of Quay County, there are probably 3i^00 acres infested with 
populations averaging 100 per .sq.'iiare yard, - Ih the D, longipennis area 
- of New Mexico as a, whole, the hatch was 98 percent con^lete by May l4. 
In Chaves and De Baca Counties, 15 percent were third Instar, 80 percent 
fourth instar, and 5 percent fifth instar. Where fourth- and fifth- 
instar nymphs predominate in De Baca County, the bands are definitely 
migrating when conditions are ’ favorable, but there is no definite con- 
sistent direction to the migrations. In areas where firsW, secondr,and 
early third-instar nymphs are dominant there is little activity except 
milling about on, and spreading from, the egg beds, (May 19-25): 
About 60, percent of the longipennis are in the fourth instar, 5 P©r 
cent in the fifth, and the remainder in the second and third,-| 
Nevada, G, G. Schweis (May 20): Hatching is occurring in many of the 
• counties in the State, and control operations are now in progress, 
'i • - 
B. M. Gaddis and assistants (May 12-18): . 'M . mexicanus in Douglas 
and Esmeralda Counties made up from to $0 percent of the grasshopper 
populations with nymphs in the first, second, and third instars. In 
the irrigated areas the hatch is 100 percent complete, ' In Nye and 
southern Lander Counties, M, occidentalis is 100 pereent hatched. 
Second to fifth instars are present. In Nye County baiting operations 
have reduced original, populations from 500 grasshoppers per square yard 
to 50 per square yard, *Hoppers are migrating in all directions, 
(May 19**25): The M, occidentalis are 50 percent in the fifth instar, 
20 percent fourth, and 30, percent adult, and rapid migrations are 
reported now occurring. In the irrigated sections hatch has been 
retarded in many instances; however it is expected that hatching will 
