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COLLKluBOLA 
Entomobryidae 
Seirp pletoni (Nicolet) (p Sira nigromaculata Lubbocl: ), a sprinj-tail 
Springtails were found breeding in the cork insulation arpur 1 
the brine pipes extending from a central refrigerating plant to in- 
dividual refrigerators in a 132-tenant apartment. T he insects eLtered 
the refrigerators where they were seen on various foodstuffs, A 5- 
percent solution of rotenone in methyl forraate was injected into ch' 
cork every 6 feet in the risers of the refrigerating pipes. Not a. 
single tenant complained of the odor from the formate and not a single 
springtail was reported in the apartment during 8 years after the 
treatment.-- Sanders (519 ) • 
DERMAPTERA 
Forficulidae 
Forflcula auricularia L., the European earwig 
Of the 54 poisons tested in baits, rotenone was twentieth in the 
list in descending order of effectiveness •--Crumb and coworkers ( 130 , 
p. 55) • 
Sprays and dusts containing lead arsenate or derris were not satis- 
factory for this pest on hops in England.— Lias see ( 402 ) . 
TRICHOPTERA 
Lironephilus lunf tus Curt., a caddis fly 
Larvae on watercress in England were killed by derris (0.00] Per- 
cent cf rotenone in the water.) • This treatment proved satisfactory, 
and later reports confirmed that the beds were free of pests. — '"- " 
(652). 
THYSANURA 
Lepismatidae 
Therm obi a doroestica (Pack.), the firebrat 
Baits containing derris (l and 4 percent of rotenone) killed t": 
brats within 24 hours, probably by contact, for no feeding w«s obsor- 
