r geographic.

Dioecious: with distinct sexes.

Dioptrate: an ocellate spot with the pupil divided by a transverse line.

Dioptric: with a transversely divided ocellus.

Diploglossata: an ordinal term proposed for Hemimeridae, because of
the supposed presence of a second labial segment.

Diplogangliata: applied to the Arthropods.

Diploptera: = diplopteryga; q.v.

Diplopteryga: Hymenoptera; wasps in which the wings are
longitudinally folded when at rest.

Dipneumones: having two lungs (certain spiders).

Diptera: an ordinal term applied to insects having only one pair of
wings (anterior): thorax agglutinate; mouth haustellate;
transformations complete.

Dipterocecidium: a gall formed by a dipterous insect.

Dipterous: belonging to or having the characters of Diptera.

Direct: applied to metamorphosis = incomplete.

Directive coloration: directive marks or colors which tend to divert the
attention of an enemy from more vital parts.

Disc: see disk.

Discal: on or relating to the disc of any surface or structure.

Discal area: of a wing applies especially to the more central portion, or
that area covered by the discal cell.

Discal bristles: Diptera; are inserted on the middle of the abdominal
segments before the hind margin.

Discal cell: Lepidoptera; the large or median cell extending from the
base of the wing toward the center: = radial cell (Comst.): in Diptera
(Will.) = 1st medial 2 (Comst.): Odonata; = discoidal areolets, q.v.:
Trichoptera, the cell between the forks of the radial sector, and
separated from the 2d apical cell by a cross-vein.

Discal patch: in some male Hesperidae the oblique streak of
specialized black scales on the disc of the primaries.

Discal vein: Lepidoptera; the cross-vein closing the discal or median
cell extends from radius 5 to media 1.

Disciform: formed or shaped like a disc.

Discocellular nervure or vein: Lepidoptera; = discal vein, q.v.

Discoidal: relating to the disc, or middle = discal.

Discoidal area: the middle area or field: Trichoptera; that area of the
tegmina between the posterior or anal and the anterior or costal areas
= d. field.

Discoidal areolets: Odonata; a varying number of rows of cells on the
outer side of the triangle between the short sector (M 4 of Comst.) and
the upper sector of the triangle (Cu 1 of Comst.) = post-triangular cells
:= discal cells.

Discoidal cell: Hymenoptera (Norton) 1st medial 2, medial 3 and
medial 4 (Coms