Key to the Chinese species of the maculosus group of the genus Celaenorrhinus

1. Forewing upperside spot in space M3 smaller than spots in CuA2................................................ 2

-. Forewing upperside spot in space M3 subequal to or larger than spots in CuA2..................................... 3

2. Forewing upperside cell spot and spot in space CuA1 separated apart. Juxta, lateral branches less than 1/2 length of two middle branches, with spherical mid-basal process....................................................... C. maculosus

-. Forewing upperside cell spot and spot in space CuA1 overlapped. Juxta, branches equal in length, with lined central-basal ridge.......................................................................................... .. C. taiwanus

3. Forewing upperside spot in CuA1 larger than cell spot and directed termen.............................. C. inexpectus

-. Forewing upperside spot in CuA1 subequal to or smaller than cell spot............................................4

4. Forewing upperside subapical spot in space R4 1/3 or 1/2 as large as spots in space R3 and R5. Juxta V-shaped............ 5

-. Forewing upperside subapical spot in space R4 conspicuously smaller than 1/3 spots in space R3 and R5. Juxta V-shaped.... 6

5. Forewing upperside subapical spot in space R4 1/3 as large as spots spots in space R3 and R5. Juxta bifid, branches roughly equal to 1/2 length of juxta...................................................................... C. osculus

-. Forewing upperside subapical spot in space R4 1/2 as large as spots spots in space R3 and R5. Juxta bifid, branches almost equal to entire length of juxta........................................................................... C. major

6. Forewing upperside cell spot and spot in space CuA1 separated....................................... C. kuznetsovi

-. Forewing upperside cell spot and spot in space CuA1 overlapped........................................ C. yaojiani