ene like 
Cotton flea hopper at Brownsville, Tex.--T. C. Barber reports 
that cotton flea hoppers were collected during: November 1933 from only 
one species of plant, Tidestromia lanuginosa, which has been recog- 
nized for several years as the local winter host plant. The numbers 
on this plant steadily decreased as the month progressed. Wo nymphs 
were. collected after November 3, he 
Biological notes on field crickets.--J. W. Folsom and assistants, 
Tallulah, La., have completed their life-history studies.of the field 
cricket (Gryllus assimilis Fab. var. pennsylvanicus Burm.), which _ 
sometimes. causes serious domage to young cotton plants in times of 
drought. There are two generations a year at Tallulah. The crickets 
hibernate as half-grown nymphs, which reach maturity in April and May. 
Adults of the new generation appear from July 15 to early in September 
and most. have died off by October 15. The maximum number of eges laid 
by a female was 808, and the average number about 300. The maximum 
egg period was 21 days (in May) and the minimum was 9 days (in July). 
It was difficult to determine the molts until P. A. Woke devised a 
method of marking the pronotum of the nymph with a spot of aluminum 
paint. The mimber of instars ranged from 9 to 12, with an average of 
10, depending on the mean temperature. The cooler it is, the longer 
the period-of nymphal development and the greater the number of molts: 
he instars are distinguishable by differences in measurements, color- 
ation, number of hind tibial spines, and number of antennal segments. 

* Hing tibial spines ; 
Instar “ey o-Quter Inner Antennal segments 
Nuriber Number Number 
Beretédaiagss 0 O 31-36 
Second..... bist ake ie 46-49 
Rhine fee. te Rinses. f 3 53-59 
Pourthetiss:. Bi 4 (5) 64-78 
ie: 6. 5 79-86 
Lees, 63th 6 5 (6) 98-113 (101-104) 
Seventh 3.!. 24. 7 (6) 6 103-145 (126-145) 
Bipnth >. o>. ne ch 6 143-177 
ye a T 6 153-196 
Men tire; 3: bat rt 6 164-213 
When there: are 9, 11, or 12 nymphal instars, these are like the 
normal tenth instar in their characters. In the ninth instar the 
wing pads appear, ani extend to the first abdominal segment. In the 
tenth instar they extend to the third abdominal segment, and the ven- 
ation has become evident. The ovipositor appears in the seventh in~ 
star; but shows no change in the eighth. Inthe ninth instar the 
ovipositor is longer, however, extending slightly beyond the abdomen. 
In the tenth instar it exceeds the abdomen by two thirds its own 
length. 
