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SCARAB PUBLICATIONS
Ritcher, P. O. and Fluke, C.L.,
Jr. 1935. Exprosopa fasciata Macq.,
white grub pupal parasite. J.Econ.Ent. 28(1): 242.
Ritcher, P.O. 1937. A new species of Phyllophaga (Coleoptera,
Scarabaeidae) from Kentucky. Ent. News 48: 285-287.
Ritcher, P.O. 1938. A field key to Kentucky white grubs. Kans.
Ent. Soc.
Jour. 11: 24-27.
Chamberlin, T.R., C.L. Fluke, Lee Seaton, J.A. Callenbach, and
P.O.
Ritcher. 1938. Population and host preferences of June beetles
in southern
Wisconsin in 1935, 1936, and 1937. Insect pest survey 18, supplement
to No. 4.
Ritcher, P.O. 1939. Observations on white grub pupation. Jour.
Kans. Ent.
Soc. 12: 64-69.
Ritcher, P.O. 1940. Kentucky white grubs. Ky Agr. Exp. Sta.
Bul. 401: 71-157.
Ritcher, P.O. 1940. Cyclocephala immaculata Oliv. as
a test insect. Jour.
Econ. Ent. 33: 704.
Ritcher, P.O. and H.H. Jewett. 1942. White grub control with
dichloroethyl
ether. Jour. Econ. Ent. 35: 441-445.
Ritcher, P.O. 1943. The Anomalini of eastern North America with
descriptions of the larvae and a key to species (Coleoptera:
Scarabaeidae). Ky Agr. Exp. Sta. Bul. 468: 1-27.
Ritcher, P.O. 1944. Dynastinae of North America (Coleoptera:
Scarabaeidae).
Ky Agr. Exp. Sta. Bul. 468: 1-56.
Ritcher, P.O. 1945. The Rutelinae of Eastern North America with
description
of the larvae of Strigodermella pygmaea (Fab.) and three
species of the
tribe Rutelini (Coleoptera: Scarabaeidae). Ky. Agr. Exp. Sta.
Bul. 471: 1-19.
Ritcher, P.O. 1945. Notes on Phyllophaga barda (Horn)
with a description
of the larva (Coleoptera: Scarabaeidae). Proc. Ent. Soc. Wash.
47: 97-99.
Ritcher, P.O. 1945. North American Cetoniinae with descriptions
of larvae
and keys to genera and species (Coleoptera: Scarabaeidae). Ky.
Agr. Exp.
Sta. Bul. 476: 1-39.
Ritcher, P.O. 1945. Coprinae of Eastern North America with descriptions
of
larvae and keys to genera and species (Coleoptera: Scarabaeidae).
Ky. Agr.
Exp. Sta. Bul. 477: 1-23.
Ritcher, P.O. 1947. Description of the larva of Pleocoma
hirticollis
vandykei Linsley (Coleoptera: Scarabaeidae). Pan-Pacif.
Ent. 23: 11-20.
Ritcher, P.O. 1947. Larvae of Geotrupinae with keys to tribes
and genera
(Coleoptera: Scarabaeidae). Ky. Agr. Exp. Sta. Bul. 506:1-27.
Ritcher, P.O. 1948. Descriptions of the larvae of some ruteline
beetles
with keys to tribes and species (Scarabaeidae). Annals. Ent.
Soc. Amer.
41(2): 206-212.
Ritcher, P.O. 1949. Larvae of Melolonthinae with keys to tribes,
genera,
and species (Coleoptera: Scarabaeidae). Ky. Agr. Exp. Sta. Bul.
537: 1-36.
Ritcher, P.O. 1949. May beetles and their control in the Inner
Bluegrass
region of Kentucky. Ky. Agr. Exp. Sta. Bul. 542: 1-12.
Howden, H.F. and P.O. Ritcher. 1952. Biology of Deltochilum
gibbosu
(Fab.) with a description of the larva. Coleopterists' Bulletin
6: 53-57.
Ritcher, P.O. and Vernon Olney. 1953. White grubs as apple tree
pests in
the Hood River Valley. Oregon State Hort. Soc. Rept. 45: 41-42.
Olney, V.W. and P.O. Ritcher. 1954. Rain beetles damage apple
roots.
Western Fruit Grower 8(7): 20.
Ritcher, P.O. and H.E. Morrison. 1955. Aphodius pardalis
LeC. a new turf
pest. Jr. Econ. Ent. 48: 476.
Ritcher, P.O. and Frank M. Beer. 1956. Notes on the biology
of Pleocoma
dubitalis Davis Coleoptera: Scarabaeidae). Pan. Pacific
Ent. 32: 181-184.
Ritcher, P.O. 1958. Biology of Scarabaeidae. Annual Rev. of
Ent. 3: 311-334.
Ellertson, F.E. and P.O. Ritcher. 1959. Biology of rain beetles
Pleocoma
spp., associated with fruit trees in Wasco and Hood River Counties.
Ore.
Agr. Expt. Sta. Tech. Bul. 44: 1-42.
Jerath, M.L. and P.O. Ritcher. 1959. Biology of Aphodiinae with
special
reference to Oregon. Pan-Pacific Ent. 35: 169-175.
Ritcher, P.O. 1961. Descriptions of some common North Indian
scarabaeid
larvae (Coleoptera). Indian Jour. of Ent. 23: 15-18.
Ritcher, P.O. 1962. Notes on Phyllophaga sociata (Horn)
with a
description of the larva. Pan-Pacific Ent. 38: 163-166.
Ritcher, P.O. 1966. White Grubs and Their Allies, a Study of
North American
Scarabaeoid Larvae. Oregon State University Monograph Series
No. 4: 1-219.
Ritcher, P.O. 1966. Oregon Diplotaxis with descriptions
of the larvae of
four common species and notes on biology. Pan-Pacific Ent. 42:
274-282.
Ritcher, P.O. 1967. Keys for identifying larvae of Scarabaeoidea
to the
family and subfamily (Coleoptera). California Department of
Agriculture,
Occaisional Papers. 10: 1-8.
Ritcher, P.O. 1968. Book Review: The natural history of dung
beetles of the
subfamily Scarabaeinae (Coleoptera: Scarabaeidae), by G. Halffter
and E.G.
Matthews. Quar. Rev. Biol. 43: 206-7.
Ritcher, P.O. 1969. Spiracles of adult Scarabaeoidea (Coleoptera)
and their
phylogenetic significance. I. The abdominal spiracles. Annals.
Ent. Soc.
Amer. 62: 869-880.
Ritcher, P.O. 1969. Spiracles of adult Scarabaeoidea (Coleoptera)
and their
phylogenetic significance. II. Thoracic spiracles and adjacent
sclerites.
Ann. Ent. Soc. Amer. 62(6):1388-1398.
Ritcher, P.O. 1969. Morphology of the posterior procoxal bridges
in
Scarabaeoidea (Coleoptera). Coleopt. Bul. 23: 89-92.
Ritcher, P.O. and R. Duff. 1971. A description of the larva
of Ceratophyus
gopherinus Cartwright with a revised key to the larvae of
North American
Geotrupini and notes on the biology (Coleoptera: Scarabaeidae).
Pan-Pacific Ent. 47: 158-163.
Ritcher, P.O. 1973. A description of the larva of Hypothyce
mixta Howden
(Coleoptera: Scarabaeidae: Melolonthini). Coleopt. Bul. 27:
113-116.
Reyes-Castillo, P. and P.O. Ritcher. 1973. Ovariole number in
Passalidae
(Coleoptera). Proc. Ent. Soc. Wash. 73(3).
Carlson, D.C. and P.O. Ritcher. 1974. A new genus of Ochodaeinae
and a
description of the larva of Pseudochodaeus estriatus
(Schaeffer)
(Coleoptera: Scarabaeidae). Pan-Pac. Ent. 50: 99-110.
Ritcher, P.O. and C.W. Baker. 1974. Ovariole numbers in Scarabaeoidea
(Coleoptera: Lucanidae, Passalidae, Scarabaeidae). Proc. Ent.
Soc. Wash.
76: 480-494.
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