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Hylaeus labiatifrons (Cockerell, 1896)
Life   Insecta   Hymenoptera   Apoidea   Colletidae   Hylaeus

Overview
Reprinted from: Snelling, R. 1970. STUDIES ON NORTH AMERICAN BEES OF THE GENUS HYLAEUS. 5. THE SUBGENERA HYLAEUS. S. STR. AND PARAPROSOPIS (HYMENOPTERA: COLLETIDAE) Contributions in Science, No. 180.

The status of this form. described from a single male from Georgia. is enigmatical. It is known only from the unique type, which I have not examined. Metz (1911) considered it a synonym of H. cressoni, but Mitchell (1960) has elevated it to species level and briefly redescribed the type. Unfortunately, Mitchell's description contributes nothing new to permit the recognition of H. labiatifrons. In all features it seems to agree quite closely with males of H. cressoni cressoni, and seems to differ from that species only in the entirely yellow tibiae.

This difference seems to me to be of little value. Another Nearctic Hylaeus, H. illinoisensis (Robertson). is supposedly recognizable on the same basis. In that species. at least, males with entirely yellow tibiae are exceptional. Even those which have the tibiae wholly yellow show, under intense light, a slightly darker basal two-thirds which corresponds to the black basal area of most specimens. I suspect that the same is true in the case of H. labiatifrons, which I regard as a probable synonym of H. cressoni cressoni. The solution must wait until the type, especially ventrites eight and nine, can be examined and compared with those of the related species.


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Updated: 2024-03-28 09:08:24 gmt
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