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Labidus Jurine
1807:282. Type-species: (Labidus
latreillei Jurine 1807) =Formica coeca (Latreille,
1802a); monobasic.
Nycteresia Roger,
1861b:21. Type-species: Formica coeca Latreille, 1802a;
monobasic.
Pseudodichthadia E.
Andre, 1886:838. Type-species: (Pseudodichthadia incerta
E. Andre, 1886) = Formica coeca Latreille, 1802a;
monobasic.
This is a small genus of nocturnal
foraging army ants that ranges from Oklahoma, Texas, and Louisiana
in the United States, south to northern Argentina. The most commonly
encountered species is L. coecus, with a range that blankets
those of all the other species.
Included
names
L.
auropubens (Santschi, 1920) (Map 3)
= L. praedator subsp. auropubens Santschi, 1920
L. coecus (Latreille, 1802a). United States to Argentina
, Trinidad (Map 4) Plate
22
= Formica omnivora Olivier, 1791
= L. latreillii Jurine, 1807
= L. jurini Shuckard, 1840a
= Mutilla (Labidus) fulvescens Blanchard, 1849
= L. saji Haldeman, 1852
= L. atriceps .F Smith, 1859b
= L. pilosus F. Smith, 1859b PREOCCUPIED
= L. panzeri F. Smith, 1859b
= Eciton vastator F. Smith, 1860a
= Eciton erratica F. Smith, 1860a
= Myrmica rubra Buckley, 1867
= Eciton Smithii Dalla Torre, 1892 new name for L.
pilosus F. Smith
= Eciton coecum var. biloba Emery, 1901c
= Eciton nigrita Emery, 1901c
= Eciton coecum subsp. Kulowi Forel, 1901c
= Eciton selysi Forel, 1904b
= Eciton grassator Forel, 1911a
= Eciton (Labidus) coecum servillei var. hostilis
Santschi, 1920c
= Eciton (Labidus) coecum var. opacifrons Wheeler,
1921b
= Eciton (Labidus) coecum var. elsbethae Forel, 1922
= Eciton (Labidus) serpentis Weber, l938a
L. curvipes (Emery, 1900) . Costa Rica to Ecuador. (Map 3)
L. mars Forel, 1912 (Map 5 )
L. nero (Santschi,1930) (Map 5)
= L. nero subsp. denticulatus Borgmeier, 1955 NEW
SYNONOMY
L. truncatidens (Santschi, 1920). (Map 7)
L. praedator (F. Smith, 1858) Mexico to Argentina. (Map 6) Plate
26
= Formica omnivora Kollar, in Pohl, 1832; not F.
omnivora Olivier, 1791
= Eciton tepeguas Norton, 1868a
= Eciton tepaguas var. ferruginea Norton, 1868a
= Eciton westwoodi Emery, 1900
= Eciton (Labidus) praedator var. guianense Wheeler,
l921b
= Eciton (Labidus) praedator subsp. sedulus Menozzi,
1926 NEW SYNONYMY
L. spininodis (Emery, 1890a). Costa Rica to Brazil and Peru.
(Map 7)
KEY
TO THE SPECIES
| Workers |
| 1 |
Petiole
without anteroventral tooth |
praedator |
| -- |
Petiole
with anteroventral tooth |
2 |
| 2
(1) |
Basal
surface of propodeum broader than long, and only slightly lower
than mesonotum |
mars |
| -- |
Basal
surface of propodeum longer than broad, and strongly depressed
below the mesonotum |
3 |
| 3(2) |
Length
of scape less than five times it's apical width, and about
one
half head length (Largest major workers only); nodes of petiole
and postpetiole about same length (dorsal view) ;color variable
reddish to dark brown. integuments smooth and shiny, short
appressed pubesence sparse. |
coecus |
| -- |
Length
of scape more than five times it's apical width, and at
least
two thirds head length (Largest major workers only); node of
petiole slightly longer than node of postpetiole (dorsal
view); color uniformly brown; densely clothed with short
appressed pubesence; integument dull |
spininodis |
| |
MALES
|
|
| 1 |
Dorsal
projection of sagitta broadly rectangular, about as broad as
length of ventral projection; sagitta of nero denticulatus
with large teeth on posterior border of dorsal projection (fig.
); posterior border of expanded apex of volsella more or less
evenly serrated (fig. ) |
nero |
| -- |
Dorsal
projection of sagitta rounded or distinctly narrower than length
of ventral projection with irregular teeth |
2 |
| 2(1) |
Anterior
border of clypeus concave in the middle (fig. ); volsella
somewhat
hook shaped with posterior projection (fig.
)
|
coecus |
| -- |
Anterior
border of clypeus straight or convex in the middle; volsella
not hook shaped |
3 |
| 3(2) |
Distance
from lateral ocellus to compound eye at least 1.5 times diameter
of lateral ocellus |
4 |
| -- |
Distance
from lateral ocellus to compound eye about equal to or less
than the diameter of lateral ocellus |
5 |
| 4(3) |
Mandible
gradually tapered to a pointed apex (Fig. ); anterior border
of clypeus strongly convex |
curvipes |
| -- |
Apex
of mandible truncate (Fig. ); anterior border of clypeus slightly
convex |
truncatidens |
| 5(3) |
Apical
one third of stipes blade shaped and abruptly narrowed (fig.
); mandible gradually tapering to a pointed tip; anterior border
of clypeus broadly and slightly convex |
auropubens |
| -- |
Apex
of stipes bluntly rounded (fig. ); mandible abruptly narrowed
near apex; median portion of anterior border of clypeus almost
straight |
praedator |
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