The efficacy of the omnidirectional Fay-Prince trap (ODFP), the Centers for Disease Controlwilton trap (WT)' and sticky lures (SL) were assessed as a means of evaluating population densities of adultAedes aegypti in Thailand- Human landing/biting (L/B) collection was used as the ref'erence method. The L/Bcollection method was significantly more effective at capturing Ae. aegypti than any of the other methods, with84% (1,072/1,272), 8.5% (108/1,272), 7.2% (92/1,272) and O% (0/1,272); of mosquitoes collected by L/B collection, ODFP, WT and SL , respectively. Overall, none of the traps evaiuated in this study was demonstratedto be an acceptable alternative to L/B collection for surveillance of adult Ae. aegypti in Thailand.