Diabrotica quadricollis Jacoby 1887: 516
Guatemala, Cubilguitz in Vera Paz
BMNH, holotype, male, verified
Body length 5.8-6.4 mm. Body width 3.0-3.2 mm. Head basic color black. Antennae serrateserrate:
in reference to antennae, saw-like, often with a sharp ridge on the outer margin
, with thickened antennomeres 4-8, bi- or tricolored, antennomereantennomere:
"segment" of antenna, more or less clearly separated
1 uniformly yellow, antennomeres 2-3 yellow, upper sides darkened, antennomeres 4-8 cinnamon brown, antennomeres 9-10 sulphur yellow, antennomereantennomere:
"segment" of antenna, more or less clearly separated
11 dark apically. Maxillary palpi black or chestnut, labrumlabrum:
the "upper lip" of beetles, a movable sclerite joined under clypeus
black. Pronotumpronotum:
the notum of the prothorax with highly sclerotized pronotal disc
yellow or light cadmium, quadrate, nonfoveate, shagreened with microsculptural narrow, long meshes. Scutellumscutellum:
small, usually triangular shield between the bases of elytra
black or amber brown. Elytra yellow or rufous, with two black bandsbands:
(here) transverse maculae on the beetle elytra
, one on the base, another behind the middle of elytronelytron:
<em>(pl. elytra)</em> the fore highly sclerotized wing of beetle
. Bandsbands:
(here) transverse maculae on the beetle elytra
may be connected together, than elytra become almost entirely black with small yellow spots. Elytral epipleura completely yellow, sutural anglesutural angle:
the posterior angle or apex of the elytron near the suture
of elytra round, punctation scattered, fine. Abdomen yellow. Tarsi and tibiae black or chestnut, femora yellow. Aedeagusaedeagus:
the main sclerotized part of the male genitalia; "aedeagus" is used here instead of "median lobe of aedeagus"
symmetric, with five internal sac scleritessclerites:
(here) the sclerotized hooks, spines or plates in the internal sac
.
Honduras, Guatemala
Unknown
Diabrotica quadricollis Jacoby is very similar to D. adelpha Harold and D. godmani Jacoby. They can be separated by the following features: scutellumscutellum:
small, usually triangular shield between the bases of elytra
is yellow in D. godmani, but black or amber brown in D. quadricollis; legs are bicolored in D. quadricollis, but yellow in D. godmani; internal sac of aedeagusaedeagus:
the main sclerotized part of the male genitalia; "aedeagus" is used here instead of "median lobe of aedeagus"
is completely different in all species.