-112- 
In experimental work with small lots of cattle in various lo- 
cations, some of the cattle in each lot were infested with one or 
more of the three species of lice commonly found on bovines. The 
animals were treated once with derris powder, and the lice were e- 
radicated.— U. S. Bureau of Animal Industry (611) • 
MALLOPHAGA 
Phil opt eridae 
Columblcola colurobae (L.), the slender pigeon louse 
In Germany derris dusts gave good results against this species 
on pigeons.— Quittek (487 ) ♦ 
Trichodectidae 
Bovloola bovls (L.), the cattle biting-louse 
For treatment, see Haematopinus euryBternua .— Babcook and Cushing 
(27); Matthysse and Schwardt I 405 ). 
Bovicola caprae (Gurlt), the red goat louse 
Bovicola limbatus (Gervais), another red louse on goats 
Bovicola crassipes (Rud.)( peniclllata authors), a large yellow or 
hairy louse on goats 
For treatment, see Lin ogna thus africanus .—Bab cock and Cushing 
(28). 
Trichodectes canis Deg., a biting louse of dogs 
This louse yielded most satisfactorily to a wash of derris powder 
that was compounded for treating warbles on cattle.— Spenoer (556 ) • 
Derris dust and flour, cornstarch, or talcum (lt2) may be dusted 
into the hair of the infested dog.— U. S. Bureau of Entomology and 
Plant Quarantine (627, p. 22). 
( Trichodeotes ) Bovicola equl (L.), the horse biting louse 
(Trichodectes ) Bovicola pilosus (Gieb.), another biting-louse of horses 
Derris, cube, or pyrethrum powders are reasonably effeotive against 
both biting and sucking lice on horses.— U. S. Bureau of Entomology and 
Plant Quarantine (627, p. 5). 
