Berosus peregrinus (Herbst, 1797)

Deler-Hernandez, Albert, Fikacek, Martin & Cala-Riquelme, Franklyn, 2013, A review of the genus Berosus Leach of Cuba (Coleoptera, Hydrophilidae), ZooKeys 273, pp. 73-106 : 86

Berosus peregrinus (Herbst, 1797) Figures 6 a–g

Hydrophilus peregrinus Herbst, 1797: 314.

Berosus peregrinus (Herbst); LeConte (1855: 364, transferred to Berosus ). - Van Tassell 1966: 163 (unpublished PhD thesis: redescription, identification key). - Smetana 1988: 50 (diagnosis, recorded from Cuba). - Hansen 1999: 91 (catalogue). - Peck 2005: 48 (checklist). - Epler 2010: 12.20 (identification key).

Type locality.

"North America".

Material examined.

CUBA: no material examined. USA: Texas: 1 ex. (dry-mounted) (NMPC); 1 ex. (in alcohol) (BSC-E): Maverick Co., Rt. 277 at Tequesquite Creek, large creek [AS-03-011], 31.viii.2003, leg. A. E. Z. Short.

Published Cuban records:Cuba: without specified locality ( Smetana 1988). Pinar del Río: without specified locality ( Peck 2005).

Diagnosis.

Habitus as in Figs 6a, b. Body length 4.1-5.2 mm. Head metallic black, pronotum pale with two small submedian dark spots anteriorly, elytra pale with rather sharply defined dark spots on intervals 1-2 and in humeral area. Elytral apices entire and rounded. Mesoventral process laminar, triangular in shape, anterior tooth large, projecting posteriad (Fig. 6c). Abdominal ventrite 1 with median keel developed only between metacoxae. Emargination of abdominal ventrite 5 rectangular with a single median broad and short tooth (Fig. 6g). Aedeagus (Figs 6 d–f) with median lobe slender, pointed at apex, parameres shorter than median lobe, very wide in lateral view, narrowing into sharply pointed apex bearing tuft of setae apically. Phallobase long, ca. 0.6 × total length of aedeagus.

Distribution.

Canada (Nova Scotia, Ontario, Quebec), USA (from New York and Pennsylvania to Florida, Louisiana, Mississippi and Texas, westward at least to Arizona, Illinois, Indiana and Wisconsin) ( Hansen 1999), and Cuba. In Cuba, Berosus peregrinus has been recorded only from Pinar del Río (without exact locality) by Peck (2005). We did not collect this species in our survey.