1		Flagellomere I slightly longer than Flagellomere II (Figure 15B)….…D. alata sp. nov.
-		Flagellomere I >2× longer than the length of flagellomere II (Figure 4C)……………..2
2		Compound eyes with microtrichia between ommatidia….………………...D. blepharis
-		Compound eyes glabrous (Figure 4D)…………………………………………………….3
3		Flagellomere IV without digitiform setae (Figure 4C)………………………………..…4
-		Flagellomere IV with several digitiform setae (Figure 18B)…………………………….5
4		Flagellomere IV shorter than flagellomere III (Figure 4C)…………D. sinensis sp. nov.
-		Flagellomere IV longer than flagellomere III (Figure 11B)……D. yunnanensis sp. nov.
5		Flagellomere IV shorter than flagellomere III (Figure 18B)……………………….……6
-		Flagellomere IV longer or equal to flagellomere III (Figure 20D)……………………..8
6		Flagellomere I about 2× the length of pedicel (Figure 18B)…...…D. acutirhina sp. nov.
-		Flagellomere I about 3× the length of pedicel………………….…………………………7
7		Flagellomere IV shorter than the Flagellomere II…………..…………………D. oporina
-		Flagellomere IV sub-equal to Flagellomere II……………………………..…D. mirabilis
8		Flagellomere I approximately 4× the length of pedicel…………………….D. nipponica
-		Flagellomere I shorter than 3× the length of pedicel (Figure 20D)………….…………9
9		Flagellomere IV with less than 6 setae (Figure 20D)…………….D. wuyiensis sp. nov.
-		Flagellomere IV with more than 3 digitiform setae……………D. sajanica, D. bicarinata