Colorado potato beetle (Evergestis rimosalis (Guen.)).--Fourth instars 
were fed dusted collard leaves for 2 days or exposed on collard leaves in 
fumigation tests for 1 day. 
Cross-striped cabbageworm (Leptinotarsa decemlineata (Say) ).--Fourth 
or fifth instars were fed treated collard leaves (1). 
European corn borer (Pyrausta nubilalis (Hbn.)).—-Newly hatched larvae 
were fed sprayed cauliflower leaves and the kill was determined after 48 
housse 
Hawaiian beet webworm (Hymenia recurvalis (F.) = fascialis (Gram.)).— 
Fourth instars were fed dusted or sprayed pigweed, except for p—bromo- 
benzenesulfonamide (No. 1), which was dusted on Swiss chard and fed to 
fifth instars (1). 
House fly (Musca domestica L.).--The tests were made by the turntable 
method (3). Two solutions were compared to show whether a compound had any 
synergism; one solution contained the compound alone dissolved in deodorized 
kerosene containing 10 percent of acetone and the other also contained 0.5 
mg. of pyrethrins per milliliter. The standard pyrethrum solution coi- 
taining 0.5 mg. of pyrethrins gave 8-17 percent kill. All compounds were 
tested at l-percent concentration or in a saturated solution where solu- 
bility was less than 1 percent. 
Imported cabbage worm (Pieris rapae (L.)).--Third instars were fed 
sprayed collard leaves for 6 days. 
Large milkweed bug (Oncopeltus fasciatus (Dall.)).--Adults were dusted 
directly and fed untreated milkweed seeds for 3 days (1). 
Melonworm (Diaphania hyalinata (L.)).--Fourth or fifth instars were 
fed dusted or sprayed pumpkin or squash leaves for 2 to 4 days. 
Mexican bean beetle (Epilachna varivestis Muls.).--Fourth instars were 
exposed on leaves sprayed with a l-percent solution to give a deposit of 16 
to 18 micrograms per square centimeter (4). 
Pseudoplusia looper (Pseudoplusia rugationis (Guen. )).--Fourth instars 
were fed dusted or sprayed collard leaves for 3 to 6 days. 
Pickleworm (Diaphania nitidalis (Stoll)).--Fourth instars were fed 
dusted or sprayed pumpkin leaves (Dc 
Red spider mite (Tetranychus telarius (L.)).--Adults and nymphs were 
fed dusted castor bean or snap bean leaves and exposed for 3 days. 
Screw-worm (Callitroga hominivorax (Cqrl.)).--The jar method (2) was 
used on newly hatched larvae. 
