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　1−１　 Antenna retractile into head capsule.
             Ligula strongly, mentum weakly.　　………………………………………………　１　Tanypodinae　モンユスリカ亜科

The larval movement is active.Body color varies, light yellow, light brown ,light green etc..The larva preys on the larva of midge in flesh-eating.	Antenna retractile into head capsul. Eye spot 1 pair.	Ligula strongly

　１−２　　Antenna not retractile.　Mentum strongly developed　……………………………………………　２

Antenna on the stand	Mentum with teeth

　　　　　　

２−１　　Living body light orange 〜dark red
　　　　　　Ventromental plate fan shape or slim laterally; usually striated　…………2 Chironominae ユスリカ亜科
　　　

Body color light orange 〜dark red. Eye spot 2 pairs located up and down , rarely 3 pairs. There is a kind to lack in ventromental tplate. exceptionally.	Ventromental plate long aside.(striated clearly)	Ventromental plate fan shape(striated clearly)

　　　　　　　　　　　　　Chironominae was shared following three groups.

２−２　　　A living body isn't red expect for an exceptation.
　　　　　　　Ventromental plate absent, if present it without radiate lines, with setae more or less. ……………　３

ventromental plate absent	ventromental plate with long setae

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

３−１　　Antenal segment 3 never annulate.　・・・・・・・・・・・・・・・・・・・・３　Orthocladiinae　　エリユスリカ亜科
　　　　　　　　　　　　　　　　　

Body color light yellow〜green〜dark purple varies （Propsilocerus akamusi is dark red , exceoptionaly) Body length  less than 2〜15mm varies.  Eye spot 1 pair : Among them an  eye spot strongly narrow back and forth. Ventromental plate absent, if present small or large plate with long, many setae.

３−２　　When Antenna is 5 segments, segment 3 annulate .
　　　　　　When antenna is 4 segments , segment 3 not annulate.　・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・　４

Antenna 5 segments;  segment 3 annulate	Antenna 4 segments. 　segment 3 shor

　

４−１　　Premandibles present. Height of procercus less than 3 times of its diameter.・・・・・・・・・・・・・・・・・・・・・・・・・・・・　５

	Procercus short

４−２　　　　Premandibles absent. Height of procercus more than 5 times of its diameter　…………　6　Podonominae　　ケブカユスリカ亜科　

	Premandible absent Antenna: anulate of segment 3 very clear	Procercus very tall

５−１　　Antenna 5 segments. Annulation of segment 3 clear .
            Ventromental plate small and without setae.　・・・・・・・・・・・・・・・・・　４　Diamesinae　ヤマユスリカ亜科
　

Comparatively large size larva. Body color yallowish brown 〜dark green various. Eye spot 1 pair. Antenna : segment 3 annulate Ventromental plate small , setae absent.

５−２　　　Antenna 4 segments. Annulation of 3 segment absent.
               Ventromental plate long and with many setae ・・・・・・・・・・・・・・・・・　５　Prodiamesinae　オオヤマユスリカ亜科

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