Osmoderma subplanatum Casey 1915, new to Colorado (Scarabaeidae: Osmodermini)

(Fig. 67–69)

The genus Osmoderma has never been recorded from Colorado (Hoffmann 1939; Howden 1968; Tauzin 1994). An old specimen of Osmoderma scabrum, labelled as collected by Fleck in Colorado, without further data, is in the Boulder Museum (UCMC). The westernmost records of O. scabrum have been from eastern Kansas (Hoffmann 1939; Tauzin 1994), rendering this old record dubious. In summer 2010, DMNS volunteer Tom Piekarski found a dead specimen of O. subplanatum in northeastern Colorado, and another specimen, this time from Denver, was posted on iNaturalist. Since this species has occasionally been recorded from western Nebraska (Ratcliffe and Paulsen 2008), its occurrence in Colorado was expected.

Material examined. DENVER CO.: Denver, Vallejo Street, 30.viii.2022, vid. L. Carnahan, photo record on iNaturalist. YUMA CO.: Wray, County Road 37, 40°06′09″ N, 102°17′42″ W, 1090 m, 18.vii.2010, leg. T. Piekarski (1 spm., DMNS, ZE.10386, Fig. 67–68).

Distribution in Colorado (Fig. 69). Only two specimens were found in Colorado. The Yuma County locality is quite remote and passive transport of the specimen seems unlikely. The specimen from Denver, while found in a neighbourhood with old trees, could easily be passively transported. However, the record from Montana (Howden 1968) indicates that an occurrence in Colorado is not unlikely.

Phenology. The two adults were found in July and August.

Note. In the literature this species is mostly called Osmoderma subplanata. Because of the neuter gender of Osmoderma, the specific name is to be used in the neuter form, subplanatum.

Dyscinetus picipes (Burmeister 1847) Bates 1888 in Colorado (Scarabaeidae: Dynastinae: Cyclocephalini)

(Fig. 70–74)

This species is known from Colorado, cited for the state by Casey (1915: 169, as D. puncticauda Casey, 1909) and Saylor (1945), but without further locality information. Ratcliffe and Cave (2017: 106) already mention some of the records below at the county level.

Material examined. ADAMS CO.: Keenesburg, 38750 East 145 th Avenue, 39°57′26″ N, 104°32′02″ W, 1588 m, 03.vi.2021, porch light, leg. Krell family (1 spm., DMNS). BENT CO.: Hasty [38°06.5′ N, 102°57.5′ W], 04.vii.1975, leg. H. Evans, W. Rubink and D. Gwynne (6 spm., CSUC). – John Martin Dam [ca. 38°04′19″ N, 102°56′16″ W], 30.vi.1979, leg. C.H. Chase III, marsh (3 spm., DMNS). – John Martin Reservoir [ca. 38°05′ N, 103°04′ W], 30.v.2002, leg. J. Schmidt (1 spm., CSUC). – John Martin Reservoir, Campground [ca. 38°04′31″ N, 102°56′03″ W, 1146 m], 14.vi.1994, leg. Evans, W. Cranshaw, and B. Kondratieff (1 spm., CSUC). – John Martin Reservoir, Country Road 26 along Caddoa Creek [ca. 38°03′15″ N, 102°55′25″ W, 1153 m], 07.vii.2004, leg. J. Schmidt and J. Owens (3 spm., CSUC). – John Martin Reservoir, Caddoa Creek and Country Road CC, 38°00′42″ N, 102°57′121″ W, 1172 m, 18.vii.2001, leg. B. Kondratieff and J. Schmidt (1 spm., CSUC). EL PASO CO.: Chico Basin Ranch, 38°37′25″ N, 104°28′01″ W, 1648 m, 20–27.v.2005, leg. P. Cushing and J. Slowik, riparian near campsite, pitfall traps (8 spm., DMNS). KIOWA CO.: Sand Creek Massacre National Historic Site off Country Road 54 [ca. 38°32′45″ N, 102°31′30″ W, 1220 m], 18.vi.2009 (7 spm.), 19.vi.2009 (4 spm.), leg. W. Cranshaw et al.; 16–17.vii.2009, leg. B. Kondratieff and D. Leatherman (2 spm.); 06–07.viii.2009, leg. R. Durfee and B. Kondratieff (1 spm.) (CSUC). OTERO CO.: Rocky Ford, Arkansas Valley Research Center [ca. 38°02′21″ N, 103°41′33″ W, 1272 m], “BLT”, 27.vi.1993, leg. F. Schweissing (1 spm., CSUC). PUEBLO CO.: Chico Basin Ranch, 38°30′07″ N, 104°26′28″ W, 1540 m, 26.v.2013, leg. D. Bettman and C. Grinter, UV light trap (4 spm., DMNS). WELD CO.: Masters [ca. 40°18′ N, 104°15′ W], 1310 m, 09.vii.1934 (1 spm., DMNS). – Pawnee National Grassland, 40°53′08″ N, 103°39′57″ W, 1408 m, 25.v.2013, leg. D. Bettman and C. Grinter, mercury vapour + UV light sheet (57 spm., DMNS; 1 ♂ DMNS_ZE.139384: Fig. 70–71). – 6 miles north-northeast of Roggen, County Road 386, 1.2 miles south of US-34, 40°16′38.1″ N, 104°17′27.9″ W, 1382 m, dunes, 19.viii.2007, UV light, leg. T. Gilligan (2 spm., CSUC). – Interstate 76 near exit 57, 6 miles east of Roggen, 40°13′02″ N, 104°12′53″ W, 1429 m, 02.vii.2001, mercury vapour light, sand sage association, leg. C. Harp (1 spm., CSUC). YUMA CO.: Sandsage State Wildlife Area, 6 km west of Wray, off County Road CC, 40°03′52″ N, 102°19′13″ W, 1109 m, 05.vii.2018, leg. B. Kondratieff and T. Kubik (8 spm., CSUC). – Wray [ca. 40°04″ N, 102°13′ W], 1065 m, 23.vii.1935 (1 spm., coll. Ed. B. Andrews, DMNS). – Wray, County Road 37, 40°06′09″ N, 102°17′42″ W, 1090 m, 22.vi.2011 (1 spm.), 14.vii.2011 (2 spm.; 1 ♀ DMNS_ZE.139385: Fig. 72–73), mercury vapor lamp, leg. T. Piekarski (DMNS). – Yuma [ca. 40°07′ N, 102°43′ W], 26.vi.1995, light trap,

leg. W. Cranshaw (1 spm., CSUC). Without county: Colorado, “Fleck, Coll.” (1 spm., UCMC).

Distribution in Colorado (Fig. 74). The species occurs in the Western short grasslands from north to south. Phenology. Adults were found from May to August.