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For Insects, Spiders & Their Kin
For the United States & Canada
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Family Alydidae - Broad-headed Bugs

Broad-headed bug - Stachyocnemus apicalis BG1291 D1377 - Alydus eurinus Broad-Headed Bug - Hyalymenus Plant Bug - Protenor belfragei BG2913 E4942 - Stenocoris Skinny bug - Stenocoris Alydus eurinus ? - Alydus eurinus Lupine Bug - Megalotomus quinquespinosus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Heteroptera (True Bugs)
Infraorder Pentatomomorpha
Superfamily Coreoidea (Leatherbugs)
Family Alydidae (Broad-headed Bugs)
Explanation of Names
30 spp. (incl. at least 7 introduced ones) in 13 genera in our area(1), over 250 spp. in ~45 genera of 2-3 subfamilies worldwide(2)(3)
Note: Neomegalotomus, not listed in(1), contains a FL species formerly treated in Megalotomus (Henry & Wilson 2004)
Overview of our fauna (classification follows(4)):
Family Alydidae
Subfamily Micrelytrinae
10-18 mm(1)
Similar to Rhopalidae & Coreidae but head relatively broader and body usually long and narrow.
key to FL spp. in(6)
Across NA(1) and much of the world; most diverse in the tropical/subtropical regions(2)
vegetation along roadsides and in wooded areas
All phytophagous(7); Alydinae feed primarily on Fabaceae (often on seeds); Micreletrynae, mainly on grasses(2)
Some are serious pests of crops, e.g. rice(8)
Print References
Fracker, S.B. 1918. The Alydinae of the United States. Annals of the Entomological Society of America, 11(3): 255-280. (5)
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.Zoological catalogue of Australia: Hemiptera: Heteroptera (Pentatomomorpha)
Cassis G., Gross G.F. 2002. CSIRO Publishing, 751 pp.
3.Biodiversity of the Heteroptera
Henry T.J. 2009. In: Foottit R.G., Adler P.H., eds. Insect biodiversity: Science and society. Oxford: Wiley-Blackwell: 223−263.
4.Livermore L.J.R., Lemaître V.A., Dolling W.R., Webb M.D. Coreoidea species file online. Version 5.0
5.The Alydinae of the United States
S.B. Fracker. 1918. Annals of the Entomological Society of America 11:1918. 255–282.
6.Key to Florida Alydidae (Hemiptera: Heteroptera) and selected exotic pest species
Jansen M.A., Halbert S.E. 2016. Insecta Mundi 0476: 1-14.
7.How to Know the True Bugs
Slater, James A., and Baranowski, Richard M. 1978. Wm. C. Brown Company.
8.Heteroptera of economic importance
Schaefer C.W., Panizzi A.R. (eds). 2000. CRC Press, Boca Raton, FL, 828 pp.