Cydia crassicornis (Walsingham)

Austin, Kyhl A. & Rubinoff, Daniel, 2023, Rediscoveries and Presumed Extinctions of Hawaiian Leaf-roller Moths (Lepidoptera: Tortricidae), Proceedings of the Hawaiian Entomological Society 55, pp. 11-27 : 14

Cydia crassicornis (Walsingham)

Presumed extinct

This species is known only from two males collected by R.C.L. Perkins in 1892 at 4000 ft near Kona, Hawaiʻi island ( Walsingham 1907). Although possibly a color form of the koa-feeding C. walsinghamii (Butler) , Oboyski (2011) considered it distinct based on subtle differences in the male genitalia. Perkins’ field notes for September 1892 indicates that he “collected … by sifting dead leaves at the foot of a big koa tree” ( Evenhuis 2007). The forewings are very similar to C. conspicua (Walsingham) , but the absence of a “sex pouch” ( Zimmerman 1978) on the ventral surface of the male hindwing readily separates it from that species.