- 34 - 
Insect and Stage 
Mallophaga (cont.) 
Preparation 
Eff ectivcness 
Rof ercnce 
Gyropidao 
GliricoLa porcclli L. 
Ditto 
Powder + inert Effective 
(1+4) as a dust 
?ov;dor + CaC03 
(1+4) as a dust 
Effective 
Calif. Agr. 
Expt, Sta. 
(16) in 1923 
De Ong and 
Vmite (ae) 
in 1924 
Gyropus ovalis Jlitzsch 
Powder + inert 
(1+4) as a dust 
Effective 
Calif. Agr. 
Expt. Sta. 
(16) in 192S 
Ditto 
Powder + CaCOg Effective 
(1+4:) as a dust 
D© OKig and 
YJhitc (26) 
in 1924 
Menoponidae 
Menopon biseriatum Piaget Powder + inert Effective 
(1+4) as a dust 
Calif. Agr. 
Expt. (16) 
in 1922, 
Ditto 
Powder + tobacco Effective 
dust (1+4) as a 
dust 
Gilner (44) 
in 19 as 
Ditto 
Powder + CaCOj Effective 
(1+4) as a dust 
Dg. Ong and 
T/hite (26) 
in 1924 
Philoptoridae 
Goniocotes. gigas Tasch. 
(large chicken louse) 
Powder + inert 
(1+4) as a dust 
Effective 
Calif. Agr. 
Expt. Sta. (16) 
in 1923. 
Ditto 
Powder + CaCOg Effective 
(1+4) as a dust 
Do' ©ng and 
Vmito (26) 
in 1924 
Lipeurus heteregraphuf 
Nitzach (chicken head 
louse) 
PoY/der as a dust Effective 
Brittain (13) 
in 1924 
Ditto 
Powder + vase- 
line (1+3) 
Effective 
Ditto 
