page 8

Hymenaphorura cockleyi (Folsom, 1908)
Aphorura cockleyi Folsom, 1908
Onychiurus similis Folsom, 1917
Figs. 26-31

Syntypes labelled cotypes of this species are preserved in the USNM and the Illinois State Nat. Hist. Survey at Urbana. I examined the cotypes of A. cockleyi and O. similis in the former institution and drew the figures given here from a slide of mounted specimens (No. 12033) which I now designate as lectotype of H. cockleyi.

Notes: SO Ant III is very prominent at the apex of Ant III, and large in relation to the segment. The PAO is as in Fig. 29 and differs from that shown in Folsom (1917, Fig. 19). The setae of Abd VI in relation to the anal spines are as in Fig. 30. The bases of the claw and of the unguiculus are coarsely granulated, and the cuticular granules in general are relatively large.

The syntype of Folsom's Onychiurus similis in the USNM (No. 20763) is in poor condition but the setae of Abd VI are exactly as in cockleyi and the anal spines on their papillae are not continguous but separated as in cockleyi. The PAO, SO Ant III and foot are all almost identical with those structures in cockleyi and I am convinced that the two species described by Folsom are conspecific. O. similis, therefore, becomes a junior synonym of H. cockleyi.