Beetles of North Carolina
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Scientific Name: Common Name:
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View Carabidae Members:
Members of Trechus:
4 NC Records

Trechus balsamensis Barr, 1962 - 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 balsamensis belongs to subgenus Microtrechus and was included in the Nebulosus Species Group by Barr (1979). In addition to balsamensis, Bosquet (2012) includes 21 species in this group, 18 of which occur in North Carolina and the rest in Tennessee.
Species Status: The type locality is Waterrock Knob in the Plott Balsam Mountains (Barr, 1962)
Identification
Field Guide Descriptions: Online Resources: BugGuide, Wikipedia, GBIF   iNaturalistTechnical Description, Adults/Nymphs: Barr (1962)                                                              
Comments: "Closely similar to nebulosus" (Barr, 1962). Members of this genus generally show too little variation in pattern for standard photographs to be used to identify particular species.
Structural Features: As a member of subgenus Microtrechus, only the first segment of front tarsus is enlarged in males. This species is distinguished from other members of its species group morphometrically and by features of the aedeagus (Barr, 1962, 1979).
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)
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