Year of publication
- Generic key to the known larvae of the Cucujidae, Passandridae, and Silvanidae of America north of Mexico (Coleoptera) (1988)
- Illustrated generic identification keys are presented to the known larvae of cucujidae, Passandridae, and Silvanidae occuring in America north of Mexico.
- Rediscovery of Romulus globosus Knull (Coleoptera: Cerambycidae) (1991)
- One of the rarest U.S. cerambycids, Romulus globosus, was described by Knull in 1948 based on four specimens collected in peninsular Florida. No new records have been reported in the literature since. Linsley (1963) apparently saw no specimens, since he merely quoted the original description, and gave the distribution as "Southern Florida."
- A new state record for Rhizophagus sayi Schaeffer (Coleoptera: Rhizophagidae) (1992)
- A specimen of Rhizophagus sayi Schaeffer collected in a flight trap at 29°34½'N82°29'W in Alachua County, Florida, on 23-1-1993, by R.W. Lundgren prompted a search of unidentified specimens in the Florida State Collection of Arthropods. The search resulted in the discovery of seven additional Florida specimens with the following data: "FLA., Dixie Co. 3.5mi. N. Old Town 13-1-1980 Coll. M.C. Thomas", 2; "FLORIDA: Alachua Co. Gainesville 3-XII-1983 Coll. M.C. Thomas", 1; "FLORIDA: Alachua Co. San Felasco Hammock 4-11-1983 M.C. Thomasn, 3; same, except date is 12-II-1983. These specimens comprise a new state record for R. sayi, which Bousquet (1990) recorded from most of the eastern United States except for Florida and Georgia.
- An annotated checklist of West Virginia May or June beetles (Coleoptera: Scarabaeidae: Phyllophaga spp.) (1994)
- This first published checklist of West Virginia May or June beetles (Coleoptera: Scarabaeidae: Phyllophaga), lists 29 species. County distributions and the range of collection dates are included.
- Two species of Cerylonidae new to Florida and the U.S. (Coleoptera) (1995)
- In their paper on the Cerylonidae of America north of Mexico, Lawrence and Stephan (1975) noted that Euxestus erithacus Chevrolat is widespread in the Antilles and, although not recorded from Florida, might be found in the southern part of the state. We here report the accuracy of their prediction.
- A new genus and species of brontine Silvanidae from Australia (Coleoptera: Cucujoidea) (2011)
- Notophanus bellicilifer Thomas, n. gen., n. sp., is described and illustrated from Australia. A key is provided to all of the species of the tribe Brontini known to occur in Australia.
- A new genus of Prioninae (Coleoptera, Cerambycidae) (2011)
- Neoma, a new genus of Cerambycidae (Coleoptera: Cerambycidae: Prioninae: Macrotomini) is described for Mallodonopsis corrosus Bates, 1879, compared to related genera (Aplagiognathus Thomson, 1861; Archodontes Lameere, 1903; and Mallodonopsis Thomson, 1861), and its tribal position discussed. A lectotype for Mallodonopsis corrosus is here designated with the species redescribed and figured.
- New Revision Underway: American Beetles: A handbook of the beetles of Nearctic America (1997)
- Several Coleopterists have been asked to revise the family sections, working from diskettes modified and provided from the original "Beetles of the United States." They will rewrite these sections, and will be recognized as the author of the section. They are asked to sign a writing contract with the publisher. Other Coleopterists have been asked to review the family sections of the new book. These persons are acknowledged in the family section text.
- Two new Neotropical species of Telephanus Erichson near T. serratus Nevermann (Coleoptera: Silvanidae) (2011)
- The Mesoamerican species of Telephanus distinguished by the presence eight lateral pronotal spines and long temples are reviewed. The group includes T. serratus Nevermann and two previously undescribed species that are described herein: T. bellus Thomas, new species, from Costa Rica, and the flightless T. monstrosus Thomas, new species, from Mexico.
- A new Nearctic species of Placonotus MacLeay (Coleoptera: Laemophloeidae) (2011)
- Placonotus falinorum Thomas, new species (Coleoptera: Laemophloeidae), is described from Kansas. Habitus and genitalic details are illustrated and the species is distinguished from other New World members of the genus. Placonotus maya Thomas is newly recorded from Honduras.