1	Male sexual character presents only on head, head with large excavation on vertex in male	2
–	Male sexual character present only on antenna	3
2	Body medium-sized, less than 2.0 mm in length; head with a short median keel and a pair of acinous patches above postgenae	Tribasodites semipunctatus (Raffray, 1912) (China: Taiwan)
–	Body large-sized, no less than 3.0 mm in length; head lacking median keel and pair of acinous patches above postgenae	Tribasodites frontalis Jeannel, 1960 (India: Himachal Pradesh, Uttar Pradesh)
3	Metatrochanter without spine or protuberance on posterior margin	Tribasodites spinacaritusYin et al., sp. n. (China: Zhejiang)
–	Metatrochanter with a spine or a protuberance on posterior margin	4
4	Body large-sized, no less than 2.5 mm in length; antennomere X nearly triangular, not modified in structure	Tribasodites antennalis Jeannel, 1960 (India: Himachal Pradesh, Uttar Pradesh)
–	Body medium-sized, less than 2.0 mm in length; antennomere X not triangular, variously modified in structure	5
5	Eyes very small, less than 40 facets; antennomere IX clearly larger than X in male, with a conical protuberance on inner side, slightly smaller than X and symmetrical in female; pronotum without lateral process, but with a pair of small antebasal denticles; each protibia with a large denticle on inner side near the middle in male	Tribasodites coiffaiti (Jeannel, 1958) (Japan: Kawauchi)
–	Eyes developed, more than 50 facets; antennomere IX smaller than X in male, X asymmetrical in male, symmetrical and subglobose in female; pronotum with a pair of large lateral processes and with a pair of antebasal denticles; protibia slender and simple in both sexes	Tribasodites picticornis Nomura, 1986 (Japan: Okinawa Island)