Other Common Names
Long-necked Ground Beetle
Synonyms and other taxonomic changes
Colliuris pensylvanica (Linnaeus)
Synonyms include pennsylvanica and pennsylvanicus (misspellings).
NB: Some taxonomists (including Wolfgang Lorenz 2005) elevate its subgenus name Cosnania to genus rank.
Numbers
One of 4
Colliuris species in North America.
(1)Identification
Unique shape characterizes this genus, and they are likely ant mimics
(3). Head and pronotum black, parts of head and pronotum reddish in the similar C. ludoviciana.
Range
Appears to be widely distributed. I found references for NM, TX, FL, NC, and Canada. White says most of North America
(4).
Downie & Arnett give its distribution as Ontario and Quebec south to Florida and west to California and Mexico.
(2)Habitat
In leaf litter and under logs and stones
(3), and on vegetation in wet areas
(4)Season
Reported January-June, October-December (North Carolina). January-September (South Carolina).
Food
Apparently predatory--mentioned as a possible aphid predator in documents found on Internet searches.
Life Cycle
Adults likely overwinter, based on seasonal distribution.
Remarks
These little beetles have been found in homes.
They are attracted to lights
(5) (2).
Print References
Dillon and Dillon, p. 104, plate XIII
(3)
Papp, illustration 970
(5)
Ciegler, p. 117, keys from similar
Colliuris ludoviciana (6).
Salsbury, p. 167--photo
(7)
Arnett et al., p. 91, fig. 238
(8)
Papp, p. 53, fig. 148
(9)
Sikes, p. 72--occurrence in Rhode Island
(10)
Brimley, p. 124--
Casnonia pennsylvanica (11)Internet References
North Carolina State University collection information--162 pinned.
