Beetles of North Carolina

Beetles of North Carolina

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View	Carabidae Members:	Members of Trechus:	4 NC Records
Trechus schwarzi schwarzi Jeannel, 1931 - No Common Name

Taxonomy

Family: Carabidae	Subfamily: Trechinae
Comments: One of 82 species in this genus that have been recorded in North America north of Mexico, 42 of which occur in North Carolina (Bosquet, 2012). Trechus schwarzi belongs to subgenus Trechus and is included in the Hydropicus Species Group by Barr (1979, 1985). Other members of this group that occur in North Carolina are Trechus hydropicus, caliginis, mitchellensis, carolinae, and roanicus; Trechus cumberlandus is the only other member of this group and is restricted to the Cumberland Plateau in Kentucky and Tennessee.
Species Status: Jeannel (1931) gave the type locality for the species as Roan High Knob. However, Barr (1962) believed that was a mistake and that Retreat, in the Great Balsams, was probably the actual source of the type specimen. Barr (1979) restricts the nominate subspecies to the form that exists in the Great Balsams, separating it from subspecies scopulosus, which is restricted to the Craggy Mountains, and saludae, which is found even more distantly in Polk County

Identification

Field Guide Descriptions:	Online Resources: BugGuide, Wikipedia, GBIF iNaturalist	Technical Description, Adults/Nymphs: Barr (1962, 1979)
Comments: Generally, members of this genus show too little variation in pattern for standard photographs to be used to identify particular species.
Total Length [body plus wings; excludes ovipositor]: 3.8-4.4 mm (Barr, 1979)
Structural Features: Larger than subspecies saludae and scopulosus

Distribution in North Carolina


County Map: Clicking on a county returns the records for the species in that county.


Flight Dates: High Mountains (HM) ≥ 4,000 ft. Low Mountains (LM) < 4,000 ft. Piedmont (Pd) Coastal Plain (CP) Click on graph to enlarge