Buchi (1991) tested the efficacy of fenoxycarb against Liposcelis bostrychophilus.    From Wordnik.com.  [Chapter 7] Reference

Note added 28 February 2009: A few days ago the creature got a more definite identification: Liposcelis bostrychophila.    From Wordnik.com.  [Archive 2008-05-01] Reference

BUCHI, R. (1991) Effects of the two IGRs methoprene and fenoxycarb on Liposcelis bostrychophilus and Acarus silo.pp. 491 -496.    From Wordnik.com.  [Chapter 10] Reference

Unfortunately, it does not control all pests and is unsuitable for control of Callosobruchus maculatus, Liposcelis bostrychophilus and Sitophilus spp.    From Wordnik.com.  [Chapter 7] Reference

At 4 ppm, fenoxycarb almost completely inhibited the formation of adult L. bostrychophilus (94% reduction in numbers of adults) for up to 8 weeks although super-nymphs were produced In Switzerland. where the investigation was conducted, fenoxycarb was regarded as a promising control agent against Liposcelis spp. in granaries.    From Wordnik.com.  [Chapter 7] Reference

Yours look like something from Liposcelidae, perhaps Liposcelis sp?.    From Wordnik.com.  [Is it an isopteran? Is it a zorapteran? It's a psocopteran!] Reference