- 22 - 
is not recommended. This insect did not thrive satisfactorily in captivit 
and proved unsatisfactory as a test insect for spraying and dusting 
experiments with derris. — Federated Malay States Department of Agricul- 
ture (_25) in 1.34. Spraying with derris was not very successful. -- 
Federated Malay States Department of Agriculture ('25_) in 1937. 
Thyanta custator (F.) 
Cassidy and Barber (12) reported in 1935 that in plat tests cube 
was less effective (45. 2-pe"rc"ent control) than derris (62.3-percent con- 
trol) in controlling this insect. 
Pyrrhocoridae 
Dy s d ere us c i n gu 1 a t u s (F.), a red cotton bug 
Gater (30) in 1925 reported that in dipping tests the nymphs are 
particularly susceptible tc derris. 
Dys dercus fasciatus Sign. 
Andries (2) in 1^32 recommended a sprav of Derrisol for the control 
of this ccttcn stainer. 
Dys aercus megalopygus Bred. 
Butac (0) in 1933 reported the results of tests with a derris dust 
(1.5 percent rotencne) on cotton insects in one of the plots of the 
Philippine Carnival Exposition. The dusting vas done at about 9 a.m. 
and amon^ the insects collected between 2 and 3 p.m. were 4 adults of 
this cotton stainer, all dead. 
Merino ard Otanes (63) in 1938 recommended derris in soapy water 
for the control of this insect on cotton in the Philippine Islands. 
Dysd ercus mimulus Irussey, the Arizona cotton stainer 
Cube dust gave 26-percent control and derris dust gave 10-percent 
control in t°sts made on caged cotton plants in the field and in lantern 
globes in the insectary. Of seven insecticides tested, pyrethruin dust 
gave the best (70 percent) control. In plat tests cube was less 
effective (45. 2-percent control) than derris (62.8-percent control). — 
Cassidy and Barber (10) in 1935. 
Dysd ercus nigrofasci atus Stal 
.Andries (2) in 1932 recommended a spray of Derriscl for the control 
of this cotton stainer. 
