Spiroacetals such as E-7-methyl-1,6-dioxaspiro[4,5]decane (trans-conophthorin; tC) and acetamides [predominantly N-(3-methylbutyl)acetamide; N3MBA], are two major groups of volatiles discovered in venoms of many Vespidae. In the course of testing the attractiveness of tC and N3MBA to Vespidae using Rescue^® Wasp TrapStiks, a significant number of female milichiids, Desmometopa nearctica Sabrosky and D. sordida (Fallén) (Diptera: Milichiidae) were trapped as well. However, the attraction of vespid wasps was not significant at the dosages tested. We found a significant synergistic effect of tC and N3MBA in attracting Desmometopa flies. Both D. nearctica and D. sordida are kleptoparasitic species; and we conclude that females of these two milichiid flies use tC and N3MBA (and likely other volatiles) released from venom glands of the social vespids (yellowjackets, paper wasps and hornets) as kairomones to locate disturbed, injured, or freshly killed insects (vespids and/or their prey) as a protein-rich food source for egg development and production.

螺缩醛，例如E -7-methyl-1,6-dioxaspiro[4,5]decane ( trans -conophthorin; tC ) 和乙酰胺 [主要是N- (3-甲基丁基) 乙酰胺；N3MBA ]，是在许多胡蜂科的毒液中发现的两大类挥发物。在使用 Rescue ^® Wasp TrapStiks 测试 tC 和 N3MBA 对 Vespidae 的吸引力的过程中，大量雌性粉虱、Desmometopa nearctica Sabrosky 和​​D. sordida (Fallén) (双翅目：Milichiidae）也被困住。然而，在测试的剂量下，胡蜂的吸引力并不显着。我们发现 tC 和 N3MBA 在吸引鳞翅目苍蝇方面具有显着的协同作用。D. nearctica和D. sordida都是盗寄生物种；我们得出结论，这两种蜜虱的雌性使用从社会胡蜂（黄夹克、纸黄蜂和大黄蜂）的毒腺释放的 tC 和 N3MBA（以及可能的其他挥发物）作为开罗门素来定位受干扰、受伤或刚杀死的昆虫（胡蜂和/或它们的猎物）作为鸡蛋发育和生产的富含蛋白质的食物来源。