Included taxa
Thorell, T. (1877c). Descriptions of the Araneae collected in Colorado in 1875, by A. S. Packard jun., M.D. Bulletin of the U. S. Geological Survey 3: 477-529. 
Species
| Species | Family | Page / figures | published as |
|---|---|---|---|
| Agelenopsis naevia | Agelenidae | 489 | Agelenopsis naevia |
| Gnaphosa brumalis | Gnaphosidae | 491 (Df) | Gnaphosa scudderi |
| Gnaphosa muscorum | Gnaphosidae | 489 (Df; preoccupied by O. Pickard-Cambridge, 1872) | Gnaphosa conspersa |
| Hogna frondicola | Lycosidae | 520 (Df, preoccupied) | Tarentula modesta |
| Linyphia orophila | Linyphiidae | 480 (Df) | Linyphia orophila |
| Mecaphesa lepida | Thomisidae | 498 (Dm) | Diaea lepida |
| Ozyptila conspurcata | Thomisidae | 496 (Df) | Ozyptila conspurcata |
| Pardosa concinna | Lycosidae | 506 (Df) | Lycosa concinna |
| Pardosa groenlandica | Lycosidae | 510 (Df) [urn:lsid:nmbe.ch:spidersp:018981] | Lycosa tristis |
| Pardosa groenlandica | Lycosidae | 512 (Df, preoccupied) | Lycosa indagatrix |
| Pardosa groenlandica | Lycosidae | 514 (Dmf) | Lycosa iracunda |
| Pardosa sinistra | Lycosidae | 517 (Dmf) | Lycosa sinistra |
| Pardosa sternalis | Lycosidae | 504 (Df) | Lycosa sternalis |
| Pardosa uncata | Lycosidae | 508 (Dmf) | Lycosa uncata |
| Pardosa xerampelina | Lycosidae | 513 (Df; preoccupied by Walckenaer, 1837) | Lycosa impavida |
| Phidippus clarus | Salticidae | 523 (Df, nomen oblitum; N.B.: considered a nomen dubium by Edwards, 2004: 61) | Phidippus coloradensis |
| Psilochorus pullulus | Pholcidae | 487 (Dm) | Pholcus pullulus |
| Rhysodromus alascensis | Philodromidae | 502 (Df, preoccupied) | Philodromus inquisitor |
| Rhysodromus histrio | Philodromidae | 500 (Df) | Philodromus virescens |
| Steatoda variata | Theridiidae | 485 (Df; preoccupied by Blackwall, 1859) | Steatoda distincta |
| Tetragnatha elongata debilis | Tetragnathidae | 479 (Df) | Tetragnatha elongata debilis |
| Tetragnatha elongata principalis | Tetragnathidae | 477 (Dmf) | Tetragnatha elongata principalis |
| Tetragnatha elongata undulata | Tetragnathidae | 477 (Dm) | Tetragnatha elongata undulata |
| Xysticus cunctator | Thomisidae | 494 (Df) | Xysticus cunctator |
Genera
No genus found for this reference