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Beetles of Glendora California
All specimens collected by Dick Swinney unless otherwise stated
Family Agyrtidae - Primitive Carrion Beetles
Determined by author
Necrophilus hydrophiloides
Rare in north foothills
1 on Apr. 15 1989 at BDC-CPG, under bark of dead Coulter Pine Pinus coulteri; 1 on Apr. 23, 1992 at BDC-WCR, at light; 9 on Nov. 12, 1992 at 200 yds. S. of Jnct. of Glendora Mt. Rd. & Little Dalton Cnyn. stream bottom, on carcass of Raccoon in late decay; 1 on Mar. 6, 1995 at BDCC in roots of recently fallen Big-leaf MapleTree Acer macrophyllum
South Hills - No record
Family Silphidae - Carrion Beetles
Determined by author
Nicrophorus guttula
Fairly common in north foothills
Mar.,-Dec., 1988-2006, at black light, in garbage cans, on Raccoon carcus, in WCR
South Hills - No record
Family Pleocomidae - Rain Beetles
Determined by Art Evans
Pleocoma australis Fall - Southern Rain Beetle
Rare
1 on Apr. 8, 1993 at LDDB, found dead in mud, specimen without head or legs,
Family Scarabaeidae - Scarab Beetles
Specimens identified by Richard Cunningham, Art Evans, Phd
Subfamily Scarabaenae - Dung Beetles and Tumblebugs
Onthophagus taurus
Rare
1 on Dec. 1 2001, 617 N. Vermont Ave., near full trash cans
1 on Mar. 25 2004, Little Dalton Cnyn., 0.5 mi. N. of Big Dalton Cnyn. Rd. on Glendora Mt. Rd., on dog dung.
Subfamily Aphodiinae - Aphodine Dung Beetles
Aphodius davisi Fall
Rare, 2 on Feb. 22, 1996, at 0.8 mi. N. of Big Dalton Cnyn. Rd. at Mystic Cnyn. Trail, inner chamber of Dusky-footed Wood Rat nest Neotoma fuscipes, obtained by use of Berlaise Funnel
Aphodius femetarius Linnaeus
Rare, possibly extirpated, as there are no longer any cattle in Glendora, cow dung, 17 collected on Feb. 10 1996 in cow dung at 0.7 mi. S. of Big Dalton Cnyn. Rd. near Wren-Meacham Trail, 1 under cow dung on March 14, 1996.
Aphodius granarius Linnaeus
Rare
2 specimens on March 11, 1996, at 0.5 mi. S.W. of Big Dalton Cnyn. Rd. on Wren-Meacham Trail in horse dung; 1 specimen on March 12, 1996 at 0.2 mi. S.W. of Big Dalton Cnyn. Rd. on Wren-Meacham Trail in horse dung.
Aphodius lividus
Abundant throughout
March - Sept., at black/mercury vapor lights, horse dung,
Aphodius luxatus Horn
Abundant only in gopher tunnels, chambers and nests, not attracted to lights, March - April,
obtained by use of Berlaise Funnel
Aphodius militaris LeConte
Fairly Common in wilderness areas, May - Sept., at black/Mercury vapor lights,
Aphodius pseudolividis
Fairly Common
May - Oct., at black light
Aphodius rugatus Schmidt
1 specimen, March 12 1996, 0.5 mi. S. of Big Dalton Cnyn. Rd. near Wren Meacham Trail., in cow dung., obtained by use of Berlaise Funnel.
Aphodius sparsus LeConte
Fairly common, Nov. at house light, 617 N. Vermont Ave., Jan. - March, Mystic Cnyn., in inner chamber of Dusky-footed Wood Rat nest Neotoma fuscipis, obtained by use of Berlaise Funnel, Jan. - South Hills, Neotoma fuscipis nest.
Ataenius cognatus Linnaeus
Rare
1 in late March 1989, at 1.4 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
1 on Aug. 15 2001 at 0.8 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
1 on June 24, 2003 at South Hills Wilderness Area, South Hills City Park, black light
Ataenius hesperius Cartwright
Common
Apr. - Aug., 1994-2005, Big Dalton Cnyn., at black light
Ataenius spretulus Haldermann
Uncommon
May - Aug. 1988-2004, Big Dalton Cnyn., South Hills, at black light
Platytomus micros Bates
Rare
2 on July 1, 1994 at Big Dalton Cnyn. Debris Basin at black light
1 on Aug. 21, 2000 at 0.8 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd. at black light.
Platytomus tibialis Fabricius
Rare
1 on Sep. 21 1992 at 0.4 mi. E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
2 on Sep. 9 2004 at 0.4 mi. E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
Subfamily Dynastinae - Rhinoceros Beetles, Hercules Beetles and Elephant Beetles
Cyclocephala dimidiata Burmeister
Rare
1 on July 19, 1988, 1.4. mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
4 on July 19, 1988, 0.4 mi., E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., in flowers of
Datura wrightii
2 on June 18, 2004, 0.5 mi. N. of Big Dalton Cnyn. Rd. at Glendora Mt. Rd., on flowers of Datura wrightii
6 on July 6, 2004, 0.7 mi. N. of Big Dalton Cnyn. Rd. in Little Dalton Cnyn., in flowers of Datura wrightii
1 on July 20, 2006, 1.4 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
Cyclocephala longula LeConte, 1863
Fairly Common
May-Aug., 1988-2006, throughout, at lights
Cyclocephala pasadenae Casey, 1915
Abundant
June-Sep., 1987- 2004, throughout, at lights
Subfamily Melolonthinae - June Beetles, Chafers, and Others
Coenonycha testacea (complex) Cazier
Uncommon
Jan., March-July, 1989-2004, Big Dalton Cnyn., at various lights
Dichelonyx muscula
Rare
1 on May 5, 1994 at Big Dalton Cnyn. Debris Basin, on California Sage-brush Artemisia californica
Dichelonyx pusilla LeConte
Fairly Common
May-Aug., 1989-2006, Big Dalton Cnyn. Drainage, net-sweep on vergetaion, at black light, Mercury vapor light.
Dichelonayx truncata LeConte
Uncommon
May-June, 1994-2004, Glendora Ridge Mtwy., Little & Big Dalton Cnyns., at black light, net sweep on vegetation.
Hoplia callipyge LeConte
Rare
1 on May 14, 1988, 1.4 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., net sweep on vegetation
1 on Apr. 4, 1993, Big Dalton Cnyn. Debris Basin, in flight over damp ground, in Black Willow Salix goodingii
Ligyrus gibbosus obsoletus LeConte
Determined by author
Rare
1 on Sep. 18, 2003, 1.4 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
2 on May 2, 2006, 1.1 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
Paracota ursina ursina Horn
Rare
In Oct. 1992, 1241 Hollis Ave., N. Azusa, Debbie Landes
Parathryce palpalis - Dusty June Beetle
Uncommon
May-July, 1989-2006, residential, at lights
Phobetas comatus Hairy June Beetle
Rare
1 on May 5, 1989, 1.1 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at lights
Polyphylla crinita LeConte
Uncommon
July- Aug., 1988-2004, Big Dalton Cnyn, Residential,Azusa Pacific Univ., various lights,
1 dead in stream being eaten by a Belastomatid water bug.
Polyphylla decimlineata Say1824 - Ten-lined June Beetle
Uncommon
June-Aug., 1987-2004, Big Dalton Cnyn, Residential, various lights
Serica acicula Danson, 1937
Rare
8 on July 1, 1994, Big Dalton Cnyn. Debris Basin, at black light
Serica alternata LeConte 1856
1 on May 21, 1996, 617 N. Vermont Ave., house lights
Serica alternata patruela Dawson 1933
Abundant
May-Oct., 1988-2004, Big Dalton Cnyn., at various lights
Serica egregia
Rare
1 on Aug. 9, 1993, 1.1 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
1 on July 12, 2002, 1.1 mi. N.E. of Gldndora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
Serica ligaprae
Rare
1 on July 14, 1992, 1.0 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
2 on July 1, 1994, Big Dalton Cnyn. Debris Basin, at black light
1 on July 12, 2002, 1.1 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
2 on July 14, 2003, 1.4 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
Serica ligulata praetermissa Dawson 1932
Common
May-Aug., 1989-2002, Big Dalton Cnyn., at black light
Serica perigonia Dawson 1920
Fairly Common
May-Oct., 1989-2002
Serica sculptilis Dawson, 1922
Rare
2 on Apr. 21, 1993, 1.1 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., on Coast Live Oak leaves Quercus agrifolia
1 on Apr. 17, 1989, 1.1 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
Serica stygia Dawson, 1933
Rare
1 on Sep. 21, 1992, 1.1 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
1 on Aug. 10, 1993, 1.4. mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
1 in Sep., 1995, Big Dalton Cnyn., at black light
1 on July 12, 2002, 1.1 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
1 on Aug. 15, 2002, 0.8 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at black light
Subfamily Cetoniinae - Flower Beetles and Others
Cotinus mutabilii Green Fruit Beetle
Common in residential areas, daylight flyers
June-Aug., 1986-2006, residential, in flight, on fruit, on humus under trees
Cremastocheilus armatus ssp. mantanus Casey
Rare
1 on Apr. 4, 1991, 0.9 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., in flight
1 on March 4, 1993, Glendora Equestrian Center, in flight
1 on March 5, 1993, 1.9 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., at jnct. of Lewis Fall Cnyn., on pavement.
1 on May 8, 1993, 0.8 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., on road, 2:00 p.m.
1 on Mar. 19, 1997, Big Dalton Cnyn. Debris Basin, on ground
1 on Apr. 16, 1999, 0.9 mi. N.E. of Glendora Mt. Rd. at Big Dalton Cnyn. Rd., on dirt
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