Key to species of adult Cycadophila occurring with Cycas debaoensis

1 Head dorsally flattened, clypeus flat in lateral view (Figs. 2 C, 5C); ventral interocular distance <1/3 head width; pronotal angles rounded, surface near anterior angle more convex, lateral margins evenly arched most of length, basally appearing rounded (Figs. 2 D, 5A); body always yellow-brown, elytra never solid color, with dark maculation along part of suture.... 2

- Head appearing dorsally ‘swollen’, clypeus convex in lateral view (Figs. 8 E, 9E); ventral interocular distance> 1/2 head width; pronotal angles more sharply angulate, surface near angle more reflexed, lateral margin parallel most of length, basally appearing more quadrate (Figs. 8 A, 9C); body dark brown, elytra unicolored or with dark maculation along part of suture and sometimes part of lateral margin.......................................................................... 3

2 Protibia distinctly dilated distally (more prominent in males), with short, stout, ventrally directed spinule fringe (Fig. 3 E); supraocular stria long, reaching anterior inner angle of eye (Fig. 3 C); dark elytral mark, usually bluntly rounded anteriorly (Fig. 2 A).................................................................... Cycadophila debaonica, n. sp.

- Protibia narrow distally, with fine distally directed setal fringe, without stout spinules (Fig. 6 D); supraocular stria short, not reaching middle of eye (Fig. 6 A); elytral mark usually acutely narrowed anteriorly (Fig. 5 A)..................................................................................................... Cycadophila fupingensis, n. sp.

3 Body larger, length> 4.0 mm, entirely brown, lacking color pattern (Fig. 8 A); supraocular stria strong, reaching middle of eye; male hind tibial inner swelling large, angulate (Fig. 8 F); China, India, Thailand ............ Cycadophila nigra (Gorham)

- Body smaller, length <3.5mm, with or without color pattern (Fig. 9 A); supraocular stria weak, occupying basal 1/4 of eye; male hind tibial inner swelling small, rounded (Figs. 10 B–C); China .............. Cycadophila yunnanensis (Grouvelle)