Extracted from Wallace E. LaBerge. New Species and Records of Little-known Species
of Melissodes from North A,nerica
(HYlnenoptera: Anthophoridae). VOLUME. 4, NUMBER 10
AUGUST 1963 |
This small species is unique among the Tachymelissodes in that
the male first flagellar segment is short, being only one-fourth to
one-fifth (minimum length) as long as the second segment. In this
respect M. sonorensis is very similar to M. monoensis LaBerge of the
subgenus Eumelissodes. However, the form of the terminalia, especially
of the seventh sternum, and the metasomal fasciae of both
sexes places sonorensis among the Tachymelissodes. M. sonorensis is
most closely allied to M. opuntiella Cockerell from which it can be
distinguished readily by the short first flagellar segment and the
yellow labrum of the male and by the smaller size and more densely
punctate terga of the female.
Female. Measurements and ratios: N, 2; length, 9 mm.; width,
2.5 mm.; wing length, 13.5 mm.; hooks in hamulus, 11; flagellar
segment I/segment 2, 1.83.
Structure and color: Integument black except as follows: eyes
gray; flagellar segments 2-10 red below; tegulae testaceous, reddish;
wing membranes hyaline, only slightly infumate, veins dark brown;
tergum 1 hyaline and yellowish apically; terga 2-4 narrowly hyaline
apically; tibial spurs testaceous.
Clypeus with coarse, round, regular punctures separated mostly
by half a puncture width, slightly elongate near apical margin,
surface shiny, unshagreened; face below ocelli with small round
punctures separated mostly by one puncture width, surface shiny;
compound eye in lateral view about twice as wide as gena; maxillary
pal pal segments in ratio of about 5:5:4: 1. Mesoscutum with posteromedian
area punctures round, irregular in size, separated mostly by
one-half to one puncture width, surface shiny; scutellum similar but
punctures smaller and more crowded; propodeum with dorsal surface
medially impunctate and slightly depressed. Metasomal tergum
1 with apical third impunctate, basal area with small to minute
punctures separated mostly by one-half to one puncture width, surface
dulled by fine transversely reticulate shagreening but moderately
shiny; tergum 2 with apical area with minute punctures,
interband zone with small round punctures separated mostly by one
puncture width or less, surface as in tergum 1; terga 3 and 4 similar
to tergum 2; pygidial plate V-shaped with rounded apex.
Hair: Head white, sparse on clypeus and vertex. l\Ilesoscutal
hairs sparse, white anteriorly, brown posteromedially; scutellar hairs
brown except peripherally white; pleural and propodeal hairs white.
Metasomal tergum I with long, erect, white hairs on basal fourth,
with short, appressed, brown, inconspicuous hairs medially, glabrous
apically; tergum 2 with basal tomentum white, distal pale fascia
white, interband zone hairs short, appressed to subappressed, brown;
terga 3 and 4 similar to 2; terga 5 and 6 dark brown to black except
small white lateral tufts; sterna brown except pale laterally. Legs
white except inner surfaces hind basi tarsi dark reddish brown, inner
surfaces fore and middle tarsi and hind distitarsi red.
Male. l\IIeasurements and ratios: N, 6; length, 8-9 mm.; width,
2.0-2.5 mm.; wing length, M = 2.47 ± 0.037 mm.; hooks in hamulus,
M = 10.33 ± 0.366; flagellar segment 2/segment 1, M = 4.97 ± 0.942.
Structure and color: Integumental color as in female except as
follows: clypeus, labrum (except narrow apical margin), and base
of mandible pale yellow; terga 2-5 with apical areas hyaline, colorless;
distitarsi rufescent. Maxillary palpi and eye width as in female;
penultimate flagellar segment less than three times as long as broad,
flagellum in repose not reaching prestigma; sculpturing as in female.
Type Mate1"ial. Holotype male and five male paratypes were
collected by lVIr. P. H. Timberlake five miles south of Navojoa,
Sonora, :Mex ico, September 21, 1957, on Kallstroemia gran d ifiora.
The allotype female and one female paratype were taken by lVlr.
Timberlake 45 miles south of Navojoa, Sonora, Mexico, September
22, 1957, on Kallsh"oemia grandifiora. The holotype and allotype
are the property of P. H. Timberlake, Citrus Experiment Station,
Riverside, California. Para types are in the collections of P. H. Timberlake
and the .university of Nebraska State Museum.