Roobla dhac[?] () magaca Saynis Arachnid, waa cayayaan (xasharaad) ka mid ah bahda dulinka yaryar taasi oo midabkeedu yahay casaan (gaduud), meelaha qaar ku nool carada, dhirta iyo xayawaanka. Dulinkani wuxuu qaniinta noolaha ay saaran tahay si ay uga hesho dhiig ay ku noolaato. Dulinkani wuu ka duwan yahay shillinta iyo gofaneha. Roob la dhac Waa noole ka mida cayayaanka la helo xiliyada roobka iyo rayska. Waxay isku bah yihiin caarada, kuwa ugu yaabka badan cayayaanka ayuu ka mid yahay, marka labku rabo in uu u tago dheddigga wuxu minadiisa ku shubaa laan ama caleen geed, ka dib na wuxu jeexaa dhabbo tilmaameysa halka minadiisa uu dhigay, dheddiga ayaanka badan ee hela dhabbahaas ayaa raaca,  ka dib na ku fariisata minadii, halkas oo ay ku rinto. Kaneeco Tukhaan Duqsi Baranbar Shillinta L. Conradt, S. A. Corbet, T. J. Roper, E. J. Bodsworth (2002) Parasitism by the mite Trombidium breei on four U.K. butterfly species. Ecological Entomology 27(6):651-659 Zhang, Zhi-Qiang (1998) Biology and ecology of trombidiid mites (Acari: Trombidioidea) Experimental & Applied Acarology 22:139-155 PDF