-102- 
Ihe seeds and roots of Mlllettia paohycarpa have long bee* used 
a, a fi»h poison and inseotioide in China. Against adult houseflies 
various extraots of ths seeds were tested, acetone extract having 
been the most effective in laboratory experiments.— Chiu and cowork- 
ers (114). 
Extraots of Tephrosla virginlana were tested on houseflies to 
determine whether their toxioixy would be reduoed by extraction on 
a hot plate and removal of the solvent by heating to determine the 
total extraot. A comparison of the results with those obtained with 
extraots made by simply shaking the root powder in aoetone or chloro- 
form showed no significant differences.— Sievera and Sullivan (541 ) . 
Rapidly boiling solutions of derris and pyrethrum produced some 
vapors toxic to flies, but sprinkling pure rotsnone on a hot surface 
was more effective, and slowly dropping solutions of rotenone and 
pyrethrum oleoresin in different solvents on a hot surface gave still 
better results. For this purpose the best solvent used was safrol, 
with whioh a copious fog or aerosol was produced on aocount of its 
high boiling point. In another paper it was reported that rotenone, 
levo-dihydro-rotenone, levo-bete-dihydrprotenone, levo-dihydrodeguelin, 
levodeguelln oonoentrate, racemio deguelin, and racemic dihydrodeguelin 
had been tested against the housefly. In aoetone solution, the two 
optioally Inactive (raoemlc) compounds were much less toxic than were 
the optioally active ones, but when tested in highly refined kerosene 
containing cyelohexanone the toxicity of the racemic compounds was 
approximately the same, or only slightly less, than tho optically ac- 
tive oompomnds.— Sullivan and coworkers (576, 577 ) » 
8tomoxys caloi trans (L.), the stablefly 
Sprays are undoubtedly the best secondary means of control. 
Rot ea one-oil or pyrethrum-oil sprays properly made not only kill all 
the flies en an animal at the time of spraying but also leave a resi- 
due on the oostt whioh for several hours will kill flies attacking 
the animal.— Bishepp and Laake (56). 
Pyrothrino and rotenone were the most offootive of the materials 
tested in controlling the stablefly. flhen sprays of those wars ap- 
plied to animals, the toxio action persisted almost undiminished for 
at least 7 hours. — U. 8. Bureau of Entomology and Plant Quarantine 
(62?, p. »•). 
Otitidae 
luxoata stigma tias Loew, a oorn-silk fly 
Hhen pyrethrum extraot in mineral oil (ls25) was injected into 
oora silks infested with the larvae of this fly only 15.8 percent of 
