- M. (Pitymys) fatioi, 67103, Zermatt, Switzerland, immature.
- M. (Pitymys) pinetorum, 76834, 2 mi. N Baldwin, Douglas Co., Kansas.
- M. (Pitymys) pinetorum, 68545, 1 mi. NE Pleasant Grove, Kansas.
- M. (Pitymys) quasiator, 30709, Teocelo, Veracruz, (d) ventral view.
- M. (Pitymys) quasiator, 19878, 5 km. N Jalapa, Veracruz.
- M. (Pedomys) ochrogaster, 75036, 1 mi. N, 2 mi. E Oberlin, Kansas.
- M. (Stenocranius) miurus, 51152, Lake Schrader, Brooks Range, Alaska.
- M. (Stenocranius) miurus, 51169, Lake Schrader, Brooks Range, Alaska.
- M. (Stenocranius) gregalis, 8059, "Eastern Europe."
- M. mexicanus mexicanus, 63094, Valle de Bravo, Estado de México, México.
- M. mexicanus mogollonensis, 63298, Mt. Taylor, Valencia Co., New Mexico.
- M. californicus, 76828, 1 mi. NE Berkeley, California; (d) ventral view.
- M. (Arvicola) richardsoni, 42454, 31 mi. N Pinedale, Sublette Co., Wyoming.
- M. richardsoni, 37903, 23-1/2 mi. S, 5 mi. W Lander, Wyoming; distal end.
Figures 40-49. Bacula of microtines. Unless indicated otherwise views are (a) of the dorsum, (b) the right side, and (c) the proximal end with the dorsal surface upward.
- Microtus (Pitymys) parvulus, UF 1508, 1 mi. W Micanopy, Florida.
- Microtus townsendii, 79186, Sec. 33, T. 11S, R. 5W, Benton Co., Oregon.
- Microtus (Herpetomys) guatemalensis, 65895, 2 mi. S San Juan Ixcoy, Guatemala.
- M. guatemalensis, 65921, 10 mi. E, 4 mi. S Totonicapan, Guatemala, dorsal view of tip.
- Microtus oeconomus, 43048, Kelsall Lake, British Columbia.
- Microtus (Chilotus) oregoni, WBQ 3-C-248, 5 mi. N Orick, California.
- Lagurus (Lemmiscus) curtatus, 26053, 9 mi. S Robertson, Uinta Co., Wyoming.
- Microtus (Chionomys) nivalis, 65127, Wetterstein, Germany, orientation uncertain.
- Microtus (Chionomys) longicaudus, 50253, Crane Flat, Mariposa Co., California.
- Neofiber alleni, 27268, 2 mi. S Gainesville, Florida, orientation uncertain.
(Microtus) provectus (the last three are probably insular derivatives of M. pennsylvanicus), M. (Microtus) fulviventer (perhaps derived from the same stock as Microtus mexicanus), M. (Microtus) xanthognathus (perhaps related to Microtus chrotorrhinus), M. (Microtus) coronarius, and M. (Pedomys) ludovicianus.
| Species of Which Bacula Were Examined | |
|---|---|
| Subfamily: Microtinae | Number of Specimens |
| Tribe: Lemmi | |
| Dicrostonyx groenlandicus (Traill) | 4 |
| Lemmus trimucronatus (Richardson) | 6 |
| Synaptomys cooperi Baird | 5 |
| Tribe: Microti | |
| Genus: Clethrionomys Tilesius, 1850 | |
| Clethrionomys rutilus Pallas | 4 |
| Clethrionomys gapperi (Vigors) | 9 |
| Clethrionomys occidentalis (Merriam) | 1 |
| Clethrionomys glareolus Schreber | 1 |
| Clethrionomys rufocanus Sundevall | 1 |
| Genus: Phenacomys Merriam, 1897 | |
| Phenacomys intermedius Merriam | 5 |
| Genus: Ondatra Link, 1795 | |
| Ondatra zibethicus (Linnaeus) | 1 |
| Genus: Microtus Schrank, 1798 | |
| (Herpetomys) guatemalensis Merriam | 3 |
| (Arvicola) richardsoni (DeKay) | 2 |
| (Chilotus) oregoni (Bachman) | 3 |
| (Stenocranius) gregalis (Pallas) | 1 |
| (Stenocranius) miurus Osgood | 9 |
| (Chionomys) longicaudus (Merriam) | 6 |
| (Chionomys) nivalis Martins | 2 |
| (Microtus) arvalis (Pallas) | 1 |
| (Microtus) orcadensis Millais | 1 |
| (Microtus) guentheri Danford and Alston | 1 |
| (Microtus) fortis Büchner | 2 |
| (Microtus) montanus (Peale) | 15 |
| (Microtus) townsendii (Bachman) | 3 |
| (Microtus) oeconomus (Pallas) | 10 |
| (Microtus) mexicanus (Saussure) | 13 |
| (Microtus) californicus (Peale) | 2 |
| (Microtus) pennsylvanicus (Ord) | 13 |
| (Microtus) agrestis (Linnaeus) | 1 |
| (Pedomys) ochrogaster (Wagner) | 41 |
| (Pitymys) pinetorum (LeConte) | 2 |
| (Pitymys) parvulus (Howell) | 1 |
| (Pitymys) quasiater (Coues) | 5 |
| (Pitymys) fatioi Mottaz | 1 |
| Genus: Neofiber True, 1884 | |
| Neofiber alleni True | 2 |
| Genus: Lagurus Gloger, 1841 | |
| Lagurus curtatus (Cope) | 7 |
| Total number examined | 184 |