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PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES<br />

Series 4, Volume 63, No. 10, pp. 329–331, 1 fig. October 14, 2016<br />

A New Synonymy in the Genus Pison Jurine, 1808<br />

(Hymenoptera: Crabronidae)<br />

Wojciech J. Pulawski<br />

Department of Entomology, California Academy of Sciences, 55 Music Concourse Drive,<br />

Golden Gate Park, California 94118, USA; Email: wpulawski@calacademy.org<br />

Pison montanum Cameron, 1908 is newly synonymized with Pison atrum (Spinola,<br />

1808). The combined range of Pison atrum extends from the Mediterranean Basin<br />

into South Africa.<br />

My recent studies on the genus Pison have revealed a previously unnoticed synonymy that is<br />

discussed below.<br />

Pison atrum (Spinola)<br />

Alyson ater Spinola, 1808:253, sex not indicated. Lectotype: ♂, Italy: Liguria: Marassi near Genova (Torino),<br />

designated by de Beaumont, 1952:42. – As Pison ater (correctly: atrum): Shuckard, 1838:75 (new combination).<br />

Pison jurinei Spinola, 1808:256, sex not indicated (as Jurini, incorrect original capitalization and termination).<br />

Lectotype: ♂, Italy: Liguria: no specific locality (Torino), designated by de Beaumont, 1952:42. Synonymized<br />

with Pison atrum by Shuckard, 1838:75, synonymy confirmed by de Beaumont, 1952:42 (as<br />

new synonym).<br />

Tachybulus niger Latreille, 1809:75, ♀. Syntypes: ♀, France: Brive and Italy: Genova (destroyed). Synonymized<br />

with Pison atrum by Shuckard, 1838:75.<br />

Pison montanum Cameron, 1908:289, ♂ (as montanus, incorrect original termination). Holotype by monotypy:<br />

♂, Tanzania: Mount Kilimanjaro: Kibonoto (Naturhistoriska Riksmuseet Stockholm), examined.<br />

New synonym.<br />

The African species Pison montanum was included by Turner (1916), Arnold (1924), and<br />

Leclercq (1965) in their keys to Afrotropical Pison, but apparently none of them examined the<br />

holotype. Of these authors, only Leclercq noticed the species close similarity to P. atrum, although<br />

he did not synonymize the two names.<br />

Pison montanum, as traditionally interpreted, and also P. allonymum Schulz, another Afrotropical<br />

species, closely resemble P. atrum (the type species of the genus) in having the following combination<br />

of characters: presence of three submarginal cells, second recurrent vein joining second<br />

intersubmarginal cell or nearly so, punctures of upper frons coarse (Fig. 1), propodeum without<br />

longitudinal carina separating side from dorsum and posterior surface, male sternum VIII broadly,<br />

deeply emarginate apically. Also, in most specimens the basal declivity of tergum I is covered with<br />

erect setae, and the hindcoxal dorsum has the inner carina produced into a conspicuous tooth basally,<br />

although the tooth is reduced in size or totally absent in many males.<br />

Pison allonymum Schulz and P. montanum (as traditionally interpreted) differ by the position<br />

of the hindocelli: in P. allonymum, the ocellocular distance is larger than the hindocellar diameter;<br />

in P. montanum it is smaller than the midocellar diameter in the female and about equal to the midocellar<br />

diameter in the male. A hitherto unnoticed difference is the shape of the clypeal lamella of<br />

329

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