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Genus Macrocephalus

Ambush Bug - Macrocephalus sp. - Macrocephalus Ambush Bug ZH3Z6220 - Macrocephalus dorannae Ambush Bug, Phymatinae - Macrocephalus dorannae Phymata 1 - Macrocephalus dorannae Macrocephalus cimicoides Macrocephalus Macrocephalus dorannae? - Macrocephalus Macrocephalus dorannae? - Macrocephalus
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 Cimicomorpha
Family Reduviidae (Assassin Bugs)
Subfamily Phymatinae (Ambush Bugs)
Tribe Macrocephalini
Genus Macrocephalus
Synonyms and other taxonomic changes
re-described by Kormilev (1951)
Macrocephalus prehensilis = Lophoscutus prehensilis
Explanation of Names
Macrocephalus Swederus 1787
7 spp. in our area(1) (9 including those now in Lophoscutus)
M. cimicoides 9-11 mm, M. prehensilis 5-6 mm(2)
Scutellum is not short and triangular, as in Phymata, it is tear-drop shaped, and extends almost to tip of abdomen (2). Species of Macrocephalus possess a distinct raised scutellar callus whereas those in Lophoscutus only have a midlongitudinal carina.
The Macrocephalus found in the United States fall into three groups based on the scutellar callus. Those with a spear-shaped callus include cimicoides Swederus, notatus (Westwood) and manicatus (Fabricius). Those with a arrow-shaped callus include dorannae Evans and barberi Evans. M. arizonicus Cockerell has the callus reduced to a single median carinae with raised reticulate lines though it is unclear how exactly this differs from that of Lophoscutus.
Most species occur in sw. US, 1 sp. in the east: M. cimicoides (NC-FL-TX-CA); related Lophoscutus (Macrocephalus) prehensilis (NC-FL to KS-TX)(2)
Likely spring and early summer (Apr-May in NC)
See Also
Works Cited
1.Nearctica: Nomina Insecta Nearctica
2.How to Know the True Bugs
Slater, James A., and Baranowski, Richard M. 1978. Wm. C. Brown Company.