-90- 
mortalities were 91.9 to 94.9 percent when a derris suspension con- 
taining 0,0054 peroent of rotenone was applied to the turf at the 
rate of 1 gallon per square yard; 97.9 to 98.9 percent when pyre- 
thrum extract was added to this to give a content of 0.001 percent 
of pyrethrin I; and 99#6 to 99.7 percent when lead arsenate was uni- 
formly distributed over the turf at the rate of 1*5 ounces per square 
yard and watered into the soil with 1 gallon of water per square 
yard. — Edwards (160 ) • 
Calliphoridae 
Calliphora erythrocephala Mg., the blue-bottle blowfly 
The results obtained are in agreement with the work of Morozov 
and Alexandrov, acting singly, on the permeability of the insect 
cuticula to various substances, while Fulton and Howard have shown 
that the toxicity of derris inside the insect may vary with the 
nature of the oil carrier used.— Hurst (302) • 
Calliphora stygia (F»), a blue-bottle blowfly 
(Lucilia) Phaenicla cuprina (7/ied.), a green-bottle blowfly 
(Lucilia) Phaenicla sericata (Mg.), the green-bottle blowfly 
None of the substances tested, including derris (19 percent of 
ether extract), showed promise as a substitute for sodium arsenite 
or calcium arsenite in the mixtures used for the control of blowflies 
on sheep in Australia.— McCulloch (376) • 
Culicidae 
Aedes cinereus Mg» 
In a glass chamber derris dust was more effective than pyrethrum 
powder.— liironov and coworkers (420 ) . 
Aedes concolor (Tayl.) 
Ground derris root was equally as toxic to larvae of this species 
in see water as to larvae of Culex (fatigans ) quinquefasciatus in 
fresh water. — Pasfield and Woodhill U58 j. 
it 
Aedes spp. 
In India complete mortality of mosquito larvae of this genus and 
of Anopheles and Culex was obtained in 24 hours with an acetone ex- 
tract of Tephrosia vogelii.— Chopra and coworkers (115) • 
