Hiltonius thebanus Chamberlin 1941

Hiltonius thebanus Chamberlin
Hiltonius thebanus Chamberlin, Bull. Univ. Utah, biol. ser., vol. 6, no. 4, p. 8,
fig. 7. 1941. Hiltonius thebanus^ Chamberlin and Hoffman, U. S. Nat. Mus. Bull., no. 212,
p. 165. 1958.
Diagnosis. — This species is so far know^n only from females and discovery of males may eventually necessitate its being lumped with one of the other species.'^ The cyphopods provide the best characters for identification ; the lateral suture is abruptly looped in a shallow depression of the lateral surface of the cyphopod.
Description.— Described from one female specimen. L 65 mm. ; W 8.0 mm.; L/W 8.1. Segments 43.
Eyes 29 + 29. Clypeal setae 8 ; labral setae 14. Stipital setae of gnathochilarium 9 + 9.
Collum resembling that of bebes,. rather long, acute laterally, and with relatively pronounced anterior emarginations. Second segment in my specimen broadly produced over entire ventrolateral area, only slightly more produced at anterior corner than at posterior corner; Chamberlin's specimen apparently showed more production at the anterior corner.
Legs short, not reaching sides of body when held horizontally.
Cyphopod with shallow depression in disc of lateral surface; lateral suture making abrupt loop within concavity.
Type. — Female (RVC). Locality: Theba, Arizona.
Specimen Examined. — Arizona. — Santa Cruz County : Madera Caiion, Santa Rita Mountains, June 11, 1898 (1 female) (USNM).
"^ I received two collections of this species while this study was in press ; both sexes are included. They will be described in a later publication.
Nomina inquirenda Spirobolus callipus Bollman, U. S. Nat. Mus. Bull., no. 46, p. 191. 1893.
Bollman's description of this form is sufficient to assign it to Hiltonius; the species should now be known as Hiltonius callipus (new combination). It is impossible, however, to be sure of its specific identity until such time as the type specimen may be found. Bollman's statement, " anterior surface tuberculate," regarding the posterior gonopod makes it probable that callipus is conspecific with either carpimis or fossulifer (or both!). In either case, callipus would be the older name.
Type. — Supposed to be in USNM but search has failed to locate it. Locality: Guanajuato, Mexico.
Hiltonius erythrotypus Chamberlin, Bull. Univ. Utah, biol. ser., vol. 8, no. 3, p. 22. 1943.
The original description of this form mentions no character of specific importance except the red and black color, and no figure is given. The species is based on a female. Inasmuch as I have been unable to see the type specimen, I can do nothing but list the name. It is my guess that, when the type is found, erythrotypus will prove to be a synonym of mexicanus. (Concerning color, see footnote 5 on page 100.)
Type. — Female (RVC; cannot be located at present). Locality: Mexico, Distrito Federal, Santa Rosa.