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Melissodes tribas LaBerge, 1961
Life   Insecta   Hymenoptera   Apoidea   Apidae   Melissodes
Subgenus: Callimelissodes


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Identification
Extracted from: Wallace, L. E., 1961. A Revision of the Bees of the Genus Melissodes in North and Central America. Part III (Hymenoptera, Apidae). The University of Kansas Science Bulletin, Vol. 43. 1-107.

M. tribas is a small species known from a single female from San Diego, California. It is closely related to M. miniscula which it resembles in color and to M. ablusa. M. tribas can be distinguished from ablusa by its paler vestiture and from miniuscula by its larger size, pale hairs of the inner surfaces of the hind bastarsi, and darker thoracic hairs.

Female. Measurements and ratios: N, 1: length, about 9.5 mm.; width, about 3.5 mm.; wing length, 2.92 mm.; hooks in hamulus, 13; flagellar segment 1/segment 2, 2.00.

Structure and color: Integumental color as in lupina buy eyes gray-green. Structure and sculpture as in minisulca expect as follows: clypeus without apicomedian carina; maxillary palpal ratio about 2.7:1.3:1.3:1.3:1.0; galae tessellate as in ablusa; mesoscutal punctures seperated mostly by half a pncutre width; tergum 2 with apical area absent, surface beneath apical pubescent band with small, round punctures seperated by two to three puncutre widths; pygidial plate U-shaped in apical half, narrow, sides diverging basad.

Hair: Vestiture as in minuscula expect as follows: mesoscutal pale hairs dark ochraceous, dark brown posteromedian patch rounded, twice area of scutellar dark patch of slightly more, extending forward beyond a transverse line at anterior margins of tegulae; tegulae without brown; metasomal tergum 2 with distal pale band uninterrupted. apical, interband zone with some short, suberect, brown, simple hairs at least medially; tergum 5 brown basally, yellow-orange apicomedially, white laterally; tergum 6 orange medially to white lateraly; sternal hairs yeloow medially, white laterally; inner surfaces hind basitarsi orange; scopae white.


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Updated: 2024-03-28 08:37:07 gmt
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