Supplementary Table 1. Primer pairs used in PCR experiments for determination of Demodex mitochondrial genome sequences. Primer Pair PCR Product Information F: R: F: R: Amplified initial fragment of DF 12S rRNA gene Anneal: Step-down 54 51˚C; Product: ~520bp Long-range PCR to amplify DF mtDNA based on initial 12S gene fragment Anneal: 63˚C; Product: ~14kb Amplified initial fragment of DB ND5 gene Anneal: Step-down 52 49˚C; Product: ~500bp Long-range PCR to amplify DB mtDNA based on initial ND5 fragment. Anneal: 68˚C; Product: ~14kb DF single-mite sequencing Anneal: 68˚C; Product: 630bp DF single-mite sequencing Anneal: 60˚C; Product: 687bp DF single-mite sequencing Anneal: 59˚C; Product: 696bp DF single-mite sequencing Anneal: 58˚C; Product: 789bp DF single-mite sequencing Anneal: 59˚C; Product: 776bp DF single-mite sequencing Anneal: 60˚C; Product: 598bp DF single-mite sequencing Anneal: 60˚C; Product: 744bp DF single-mite sequencing Anneal: 60˚C; Product: 660bp DF single-mite sequencing Anneal: 59˚C; Product: 769bp DF single-mite sequencing Anneal: 60˚C; Product:579bp DF single-mite sequencing Anneal: 57˚C; Product: 754bp DF single-mite sequencing Anneal: 58˚C; Product: 757bp DF single-mite sequencing Anneal: 60˚C; Product: 786bp DF single-mite sequencing Anneal: 60˚C; Product: 792bp DF single-mite sequencing Anneal: 60˚C; Product: 766bp DF single-mite sequencing Anneal: 59˚C; Product: 581bp DF single-mite sequencing Anneal: 59˚C; Product: 790bp DF single-mite sequencing Anneal: 60˚C; Product: 735bp DF single-mite sequencing Anneal: 60˚C; Product: 778bp DF single-mite sequencing AGAGTGACGGGCGATRTGTRCA WWRRAIHRGGATTAGATACCCT CTCTTCCTTTTCTAAAAATCTCCTCAATTCCCAAAAC TTGAAACTTGATTTTGTTGGCGGTTTAAAGG F: CAAATCCACAAAAAACCCCC R: TTGGCTATGGCTGCTCCTACTC F: AACTGTCTAAGAGTAGAAAAAAGCAATCACCC R: AGGATTTTTAAGTTTGTTTATTTTATGTGGTTTAGG F: ACTAACCACAAAGACATTGGAACA R: GAAAGAGCTTCTGAAGTTTCGGTC F: CCCTGGACACTCCGTAGATTTAAT R: AGTGTTACGTCTAGGGAGGAGTTA F: ATGAGCCCACCACATATTTACAGT R: AGTTGGCATTAGGATTGAATGAAGA F: ACATTTTATAGGACTAAACGGCCT R: GTTTAGTCGTCCTGGGATAGAGTC F: ACTGAACTTACTCCTACCCAGAAC R: TGTTGGGTCTTATGTTGGATGAGT F: CAATTTGACCCATCGAACTCCTTC R: TGTAGGCTTGTAAGATTGCTACCA F: AACCCCAAACTTACTTGTACCCTT R: AGGGCAATAGTTTACAGTTCTGGT F: TCAGTAGCCATTTACGGAAACTGA R: GAATCCACATTCGAAGGGTGAATT F: AGCTGTATGATATTGGCATTTCGT R: CACGAGTTGATTGGGCCTAAATTT F: ATGTAGCCTTCTCTTTGGGGAAAT R: TAGAGGTATCGGAAGGTGTCTCTT F: AGAAATTTGGATTAGGGGAATTAACT R: CAGCAGTTTCGGTTAAGGGATTAA F: TCTCCTCAATTCCCAAAACTTTCA R: TGTGGATTTGGTTTTAGTGGATTTGT F: TATAGACCAAAAGCTCCAACCACA R: CTGGTATTATGGGGTTGGTTGAGA F: CGTAATGCACTCCCTTAAACCAAG R: TTTTGGCTAATCGATTTGGGGATG F: AAGAAGAAACAGGAGTAGGAGCAG R: TATGGCTTTGTAAGAGGGGTTTCT F: CCAACTTCATACCTACACAACCAC R: TTTGTTTTGTCTGCGAAGTTCTGA F: ACCACGCATAATTAAAACTCTCCG R: TGTTTTGGTTATGGGGAATTGAGG F: GCATATAAACCCCAGCTCTCAAAC R: TTTGGGAGTAAAAGGAGTGCTTCT F: TTCTTCCCCTTCCACGAACTAAAT R: TTTAGTGCTTTTGAGTGCAGTTCC F: CCCTCTGTGAATTATTTCAATCGCA R: GAAAGTGGATGGAAAAGAAACGGT F: TCCCACACATGAATATCAGGGTTT R: ACGGTTCTTCGATGACTTGTTTTC F: TATTTGCTTACGCTATCCTACGCT R: TTGTTTAGCTGAAATAAGCCGCTC F: CAGTACACCACGAATAACCACAAA R: TTTGGGAGAGCGTAAAATTTTGGG F: AATAAATTAGCAATCCCCATAAAGG R: TGAGTGGAGTAATGGGTGCTTTTA F: AAAATCAAAAGCCAACATCGAGGT R: AGAGCGAAATTAGTTGAGATAACTCT F: AAACACCACTCCCAAGCTACTAAT R: TGAGGGAAGAGTTTGGAAGATGAA F: GGCTTGTCTTCAAACTCCTGAATC R: TGGTGGGATTCCTGACAATGATAA F: ACTCTGTTCAATCTACTTCCTCACC R: TGTTCCAATGTCTTTGTGGTTAGT F: TTATCATTGTCAGGAATCCCACCA R: TGGAAAATTTTGCCAGGTTGTCTT F: CTCTTCGAAAGTCTAACCTTCCCT R: ACTTGTTCTGGTTTAATTTTCGGGT F: TCATAATCTTCTCCCTCCACATCG R: ATTGCGAATACTGCTCCTATGGAT F: GCCACAATAGTAATCGCAATTCCA R: TTGGTTCATGTTTTGTTGGAGAGG F: CTACTACCCAGACACCAACAATGA R: ATTCCGCATAATTCTGAGCATTGG F: GCTTAATCACTACCAGAAACGACG R: TTTGTTGGTGAGTGTTAGTGATGC F: CATCCTAAACTTCAACCCAAACCC R: TGATGATGTATGCCTGTAGGATGG F: AACTTCATACCCCACCTTAATCCC R: TTCTTGATGAAAGGAGGAGGATGG F: TCCCTAAGTCCTGCAATAGACCTA R: GAGGTTTTGGATGGGTTGAAGATG F: CTTCAACATCTCCCCAACAAAACA R: TCCTTATCTTGTTTCTTTCCCCGA F: AGAGATGAAACATTTTAACTTGCA R: CGGAAGATGCTTCTTGTAAACCTC F: ACTTATAGATTCTAAATCCATCGTACT R: TTTAAGCAGGGTTGGGTGATTTTG F: GCCCCTCTGTAAAACCTTTAAACC R: GGGTTTTACCTGTTGTGGTTCTTT F: ACTCTTCAAACTCACAAATCCCCT R: GATGAAGGTTTGTTTTGGTAGGCA F: AAGGCATACCAAACAAAGAACCAC R: GGTTGGGATGGTTTAGGGATTACT F: TGAACCAAAGAAGAAACCGGAGTA R: TTGTTGGTATTGGTGGATTTGTGG F: ACCAAACCATCACTCAAAACAAAA R: ATGTGATTTGAGGGTTATGGTTGC F: CGCATAACCAAAACTCTACGAGTC R: TTTGTTTTGGTGATGGGTAGTTGG F: CCTCAATCCAAATCCCAACACAAA Anneal: 60˚C; Product: 746bp DF single-mite sequencing Anneal: 60˚C; Product: 703bp DF single-mite sequencing Anneal: 60˚C; Product: 623bp DF single-mite sequencing Anneal: 59˚C; Product: 721bp DF single-mite sequencing Anneal: 56˚C; Product: 704bp DF single-mite sequencing Anneal: 58˚C; Product: 765bp DF single-mite sequencing Anneal: 60˚C; Product: 794bp DF single-mite sequencing Anneal: 60˚C; Product: 666bp DF single-mite sequencing Anneal: 59˚C; Product: 777bp DF single-mite sequencing Anneal: 60˚C; Product: 742bp DB single-mite sequencing Anneal: 60˚C; Product 799bp DB single-mite sequencing Anneal: 60˚C; Product: 733bp DB single-mite sequencing Anneal: 60˚C; Product: 784bp DB single-mite sequencing Anneal: 60˚C; Product: 680bp DB single-mite sequencing Anneal: 60˚C; Product: 604bp DB single-mite sequencing Anneal: 60˚C; Product: 712bp DB single-mite sequencing Anneal: 60˚C; Product: 723bp DB single-mite sequencing Anneal: 60˚C; Product: 791bp DB single-mite sequencing Anneal: 59˚C; Product: 796bp DB single-mite sequencing Anneal: 55˚C; Product: 754bp DB single-mite sequencing Anneal: 56˚C; Product: 789bp DB single-mite sequencing Anneal: 60˚C; Product: 787bp DB single-mite sequencing Anneal: 60˚C; Product: 634bp DB single-mite sequencing Anneal: 60˚C; Product: 709bp DB single-mite sequencing Anneal: 60˚C; Product: 767bp DB single-mite sequencing Anneal: 58˚C; Product: 652bp DB single-mite sequencing Anneal: 60˚C; Product: 788bp DB single-mite sequencing 2 R: GAAGCAGAATGAAGTCTTTGGACA F: ACCAATGAACTAACCGTCCCAATA R: TGGATTGTTGAGTTTGAGGCTTTG F: CCAAAGCATCAAACCTTACCACAA R: ATTTGTCCTCATGGGAGTACGTAG F: CATTCAACCGGAGCTTCACTATTC R: GTTCTTCAATTACCTGGGCTCCTA F: CCAACCCACTATCAACACCAAATC R: TTTTAGAGGGTGAGTCTGAGTTGG F: CAAGAACATCCCTCCAAAACACAA R: TGGTAATAAGCGGTTTGGTCCTAA F: AAACTTTCTCCTTCTTGCTCAACC R: AGGCTAAAGTGTTCTTAAAGACGA F: ACCAACATCGAGGTAACAAACTCA R: TTGTATAAGGCAGTGAGGATTGGT F: TGAAGCTTAACCATCAGCCCTTAA R: TGAGAGAGTTGTTGGGTATTTGGT F: GGAATCTCCTCCAATTCCTGACTA R: AGAATGCTTGAGTTGAGTAGGGTT F: ACCCTCAACATCCAATCTCTAACA R: GGTTGGTTGATATGATTCATCGCA F: TAGTAGAAACAAGCCCATGACCAA R: TAGGTCTATTGCAGGACTTAGGGA F: TCAGTAGCCATTTACGGAAACTGA R: CGTGAAGTCCAGTTGTCATGAAAA Anneal: 59˚C; Product: 740bp DB single-mite sequencing Anneal: 60˚C; Product: 730bp DB single-mite sequencing Anneal: 60˚C; Product: 795bp DB single-mite sequencing Anneal: 60˚C; Product: 784bp DB single-mite sequencing Anneal: 60˚C; Product: 646bp DB single-mite sequencing Anneal: 60˚C; Product: 749bp DB single-mite sequencing Anneal: 58˚C; Product: 779bp DB single-mite sequencing Anneal: 60˚C; Product: 798bp DB single-mite sequencing Anneal: 60˚C; Product: 715bp DB single-mite sequencing Anneal: 59˚C; Product: 764bp DB single-mite sequencing Anneal: 59˚C; Product: 799bp DB sequence identity confirmation Anneal: 60˚C; Product: 308bp DF sequence identity confirmation Anneal: 60˚C; Product 304bp Forward and reverse primers that were used together successfully in PCR experiments are listed, along with relevant information for each such pair: purpose of the experiment, annealing temperature used for amplification, and the resulting product size. DF = D. folliculorum; DB = D. brevis. 3