Most, if not all, of the following specimens were examined by B. C. Nelson and are included in his 1972 revision of the Ricinus species from hosts from
North and South America.
| Ricinidae | Ricinus arcuatus Kellogg & Mann. |
| No. slides: | 1 |
| Host: | Tyrannus tyrannus |
| | |
| Ricinidae | Ricinus arcuatus Kellogg & Mann. |
| No. slides: | 1 |
| Host: | swallow ?error |
| | |
| Ricinidae | Ricinus arcuatus Kellogg & Mann. |
| No. slides: | 2 |
| Host: | Tyrannus dominicensis |
| | |
| Ricinidae | Ricinus australis Kellogg. |
| No. slides: | 1 |
| Host: | indigo bunting |
| | |
| Ricinidae | Ricinus calcarii Nelson. |
| No. slides: | 1 |
| Host: | Calcarius lapponicus |
| | |
| Ricinidae | Ricinus dendroicae Nelson. |
| No. slides: | 3 |
| Host: | blackburnian warbler |
| | |
| Ricinidae | Ricinus diffusus Kellogg. |
| No. slides: | 1 |
| Host: | Spizella monticola |
| | |
| Ricinidae | Ricinus diffusus Kellogg. |
| No. slides: | 1 |
| Host: | savanna sparrow |
| | |
| Ricinidae | Ricinus diffusus Kellogg. |
| No. slides: | 2 |
| Host: | tree sparrow |
| | |
| Ricinidae | Ricinus diffusus Kellogg. |
| No. slides: | 3 |
| Host: | Junco oreganus |
| | |
| Ricinidae | Ricinus diffusus Kellogg. |
| No. slides: | 4 |
| Host: | Melospiza melodia |
| | |
| Ricinidae | Ricinus diffusus Kellogg. |
| No. slides: | 16 |
| Host: | Spizella arborea arborea |
| | |
| Ricinidae | Ricinus elongatus Olfers. |
| No. slides: | 1 |
| Host: | Planesticus migratorius migratorius |
| | |
| Ricinidae | Ricinus fringillae De Geer. |
| No. slides: | 1 |
| Host: | Amphispiza bilineata deserticola |
| | |
| Ricinidae | Ricinus fringillae De Geer. |
| No. slides: | 1 |
| Host: | Passer domesticus |
| | |
| Ricinidae | Ricinus fringillae De Geer. |
| No. slides: | 3 |
| Host: | Junco hyemalis |
| | |
| Ricinidae | Ricinus fringillae De Geer. |
| No. slides: | 9 |
| Host: | Pooecetes gramineus |
| | |
| Ricinidae | Ricinus irascens Burmeister. |
| No. slides: | 2 |
| Host: | Fringilla coelebs coelebs |
| | |
| Ricinidae | Ricinus marginatus Children. |
| No. slides: | 1 |
| Host: | Mylarchus crinitus |
| | |
| Ricinidae | Ricinus marginatus Children. |
| No. slides: | 1 |
| Host: | Selurus novebracensis |
| | |
| Ricinidae | Ricinus marginatus Children. |
| No. slides: | 1 |
| Host: | kingbird |
| | |
| Ricinidae | Ricinus rubeculae Schrank. |
| No. slides: | 1 |
| Host: | Erithacus rubecula |
| | |
| Ricinidae | Ricinus thoracicus Packard. |
| No. slides: | 1 |
| Host: | Calcarius lapponicus |
| | |
| Ricinidae | Ricinus thoracicus Packard. |
| No. slides: | 3 |
| Host: | Plectrophenax nivalis |
| | |
| Ricinidae | Ricinus vireoensis Nelson. |
| No. slides: | 1 |
| Host: | red-eyed vireo |
| | |
| Ricinidae | Trochiloecetes prominens Kellogg & Chapman. |
| No. slides: | 1 |
| Host: | Archilochus colubris |
| | |