- Howard, L. O. 1898. Notes from correspondence Some miscellaneous results of the work of the Division of Entomology. United States Department of Agriculture, Division of Entomology, new series, Bulletin 1097-98.
- Riley, C. V., and L. O. Howard. 1891. [Scolytus rugulosus]. Insect Life 3298.
- Carter, W. 1949. Insect notes from South America: Xyleborus affinis Eichhoff on mango. Journal of Economic Entomology 47645.
- Howard, O. B. 1897. Pterocyclon fasciatum Say and Anisandrus tachygraphus Zimm. United States Department of Agriculture, Division of Entomology, Bulletin 779-85.
- Riley; Howard 1890
- Hicks, R. R., J. E. Howard, J. E. Coster, and K. G. Watterston. 1978. The role of tree vigor in susceptibility of loblolly pine to southern pine beetle. Pages 177-186 in Fifth North American Forest Biology Workshop, Proceedings (University of Florida, Gamsville).
- Hicks, R. R., J. E. Howard, K. G. Watterston, and J. E. Coster. 1980a. Rating east Texas stands for southern pine beetle susceptibility . Southern Journal of Applied Forestry 5:7-10.
- Hicks, R. R., J. E. Howard, K. G. Watterston, and J. E. Coster. 1980b. Rating forest stand susceptibility to southern pine beetle in east Texas . Forest Ecology and Management 2:269-283.
- Hicks, R. R., J. E. Howard, K. G. Watterston, and J. E. Coster. 1981. Gulf coastal plain, eastern Texas. Pages 8-15 in J. E. Coster, and J. L. Searcy (eds.), Site, stand and host characteristics of southern pine beetle infestations. United States Department of Agriculture, Combined Forest Pest Research and Development Program, Technical Bulletin 1612.
- Howard, L. O. 1888. Annual address of the president: A commencement of a study of the parasites of cosmopolitan insects. Entomological Society of Washington, Washington, D.C., Proceedings 1:118-136.
- Howard, L. O. 1889. Eccoptogaster rugulosus Thorns. Entomological Society of Washington, Washington, D.C., Proceedings 1:129.
- Howard, L. O. 1906. Report of the Entomologist . United States Department of Agriculture Bureau of Entomology, Annual Report 1906:14.
- Howard, L. O. 1912. Report of the Entomologist for 1912 [Scolytidae, p. 22-23]. United States Department of Agriculture, Bureau of Entomology, Annual Report.
- Howard, L. O. 1914. Report of the Entomologist. United States Department of Agriculture, Bureau of Entomology, Annual Report 1914. 16 p.
- Howard, L. O. 1916. Investigations of insects affecting forest and shade trees and hardy plants. United States Department of Agriculture, Bureau of Entomology Annual Report 1915-1916. 24 p.
- Howard, L. O. 1920. Report of the Entomologist. United States Department of Agriculture, Bureau of Entomology, Annual Report 1919-1920. 36 p.
- Howard, L. O. 1922. Report of the Entomologist. Pages 21-26. United States Department of Agriculture, Bureau of Entomology, Annual Report 1922.
- Howard, L. O. 1923. Report of the Entomologist. Pages 29-32. United States Department of Agriculture, Bureau of Entomology, Annual Report 1923.
- Howard, L. O. 1924a. Insects damaging forest trees. Pages 410-411 in Report of the Entomologist. United States Department of Agriculture, Bureau of Entomology, Annual Report for 1923.
- Howard, L. O. 1924b. Report of the entomologist. United States Department of Agriculture, Bureau of Entomology, Annual Report 1923-1924. 30 p.
- Howard, L. O. 1927. Report of the Entomologist [Scolytidae, p. 24-25]. United States Department of Agriculture, Bureau of Entomology, Annual Report.
- Howard, O. B. 1916. Report of the Entomologist for the year ended June 30th 1916 . United States Department of Agriculture, Bureau of Entomology, Annual Report 1915- 1916:1-24.
- Howard, T. M. 1973. Accelerated tree death in mature Nothofagus cunninghamii Oerst forests in Tasmania . Victorian Naturalist 90:343-345.
- Mason, G. N., R. R. Hicks, C. M. Bryant, M. L. Mathews, D. L. Kulhavy, and J. E. Howard. 1981. Rating southern pine beetle hazard by aerial photography. Pages 109-114 in R. L. Hedden, S. J. Barras, and J. E. Coster (tech. coords.), Hazard-rating systems in forest insect pest management: symposium proceedings. United States Department of Agriculture, Forest Service, General Technical Report WO-27. 169 p.
- Mason, G. N., and J. E. Howard. 1980. A test of small-scale aerial photo susceptibility ratings for the southern pine beetle in east Texas. Pages 83-85 in C. L. Kirby, and R. J. Hall (compilers), Practical applications of remote sensing to timber inventory. Proceedings of a workshop held 26-28 September 1979, in Edmonton, Alberta. Canada Department of the Environment, Canadian Forestry Service, Northern Forestry Research Centre, Information Report NOR-X-224. 162 p.
- Tarjan, A. C., and F. L. Howard. 1953. Comparison of benzothiazolyl-2-thioglycollic acid derivatives with other chemicals for Dutch elm disease therapy [abstract] . Phytopathology 43:486.
- Howard, L. O. 1898. [Hylastinus trifolii (=obscurus)]. United States Department of Agriculture, Yearbook for 1897.
- Howard, A. 1991. Timber quality classes from cruise data for lodgepole pine sawn at a board mill in British Columbia . Canadian Journal of Forest Research 21:498-503.
- Howard, R., and F. Infante. 1996. Cuticular hydrocarbons of the host-specific ectoparasitoid Cephalonomia stephanoderis (Hymenoptera: Bethylidae) and its host the coffee berry borer (Coleoptera: Scolytidae) . Annals of the Entomological Society of America 89:700-709.