Cryptocephalus, Geoffroy, 1762

Key to species of the Cryptocephalus View in CoL ( C.) perelegans and its relatives in Japan

1. pygidium without longitudinal ridge...................................................................... 2

- pygidium with median longitudinal ridge................................................... C. ( C.) loochooensis

2. pronotum reddish brown with yellowish brown spots......................................................... 3

- pronotum black with yellowish brown spots................................................................ 7

3. elytra pale reddish brown with yellowish spots; margins of elytral spots unclear.................................... 4

- elytra black with yellowish spots; margins of elytral spots distinct............................................... 5

4. scutellum hart-shaped, convergent to apex, lateral margins moderately and weakly curved; elytral striae VI to IX complete.......................................................................... C. ( C.) tsutsumiuchii sp. nov. (part)

- scutellum tongue-shaped, basal margin sinuate, lateral margins subparallel-sided; elytral striae VI to IX partly confused..................................................................................... C. ( C.) perelegans (part)

5. elytra with six or more yellowish spots.................................................................... 6

- elytra with three yellowish spots; 1) basi-scutellar spot round and small, reaching from base to basal 5/6, 2) median spot largest of all elytral spots, spread from elytral suture to lateral margin, 3) apical spot small and round; median spot sometimes separated to small and oblong median spot and large latero-median spot............................... C. ( C.) perelegans (part)

6. elytra with six yellowish spots..................................................................C. (C.) ohnoi

- elytra usually with eight yellowish spots. In the Tokara Isls., elytral spots of some individuals strongly reduced............................................................................................ C. ( C.) perelegans (part)

7. elytra with five yellowish spots.................................................... C. ( C.) tsutsumiuchii sp. nov.

- elytra usually with eight yellowish spots. In the Tokara Isls., elytral spots of some individuals strongly reduced............................................................................................ C. ( C.) perelegans (part)