Scrapter semirufus Cockerell, 1932

Mack, Anne & Kuhlmann, Michael, 2023, Revision of the nitidus species group of the bee genus Scrapter Lepeletier & Serville, 1828 (Hymenoptera: Apoidea), European Journal of Taxonomy 912, pp. 1-119 : 69-73

Scrapter semirufus Cockerell, 1932

Figs 48–50

Scrapter semirufa [sic!] Cockerell, 1932a: 452, lectotype ♀ [designated by Eardley 1996] (type locality: Port Elizabeth, South Africa) (NHML), examined.

Diagnosis

The female of S. semirufus can be separated from that of all other species of this group by the following character combination: T3 anterior of premarginal line impunctate ( Fig. 48E ); T1 anterior of premarginal line with a row of points ( Fig. 48F ); propodeum completely carinate, matt ( Fig. 48D ); supraclypeal area squarish ( Fig. 48B ). The male is characterized by discs of T1–T3 superficially punctate, dense (i <1 d) punctation covers at most basal three quarters of the tergum ( Fig. 49D ).

Additional material examined (63 specimens)

SOUTH AFRICA • 1 ♀; W Cape, 1 km N of Struisbaai ; 34°47′20″ S, 20°00′10″ E; 27 Sep. 2001; RCMK • 1 ♀; W Cape, Agulhas ; 34°49′92″ S, 20°00′14″ E; 27 Sep. 2011; RCMK • 1 ♀; Van Rhyn's Pass ; 31°22′ S, 19°01′ E; 820 m a.s.l.; 11–21 Nov. 1931; AM leg.; NHML • 3 ♀♀; Camps Bay, Cape Peninsula ; 33°57′ S, 18°22′ E; 5 m a.s.l.; Sep. 1920; RT leg.; NHML • 1 ♀; Lion's Head, Cape Town; 33°58′ S, 18°23′ E; 5 m a.s.l.; Aug. 1920; RT leg.; NHML • 1 ♀; same collection data as for preceding; 21–31 Jul. 1920; RT leg.; NHML • 5 ♀♀; Port Elizabeth ; 33°58′ S, 25°36′ E; 80 m a.s.l.; 29 Oct. 1931; JO leg.; NHML • 1 ♀; same collection data as preceding; RCMK • 1 ♀; Mossel Bay ; 34°10′ S, 22°07′ E; 60 m a.s.l.; 17 Sep. 1938; RT leg.; NHML • 1 ♀; same collection data as for preceding; 1–14 Nov 1921; RT leg.; NHML • 12 ♀♀, 2 ♂♂; same collection data as for preceding; Sep. 1921; RT leg.; NHML • 1 ♀; same collection data as preceding; RCMK • 5 ♀♀, 1 ♂; same collection data as for preceding; Oct. 1921; RT leg.; NHML • 5 ♀♀, 18 ♂♂; same collection data as for preceding; Aug. 1932; RT leg.; NHML • 1 ♀, 1 ♂; same collection data as for preceding; RCMK • 1 ♂; same collection data as for preceding; Sep. 1933; RT leg.; NHML .

Description

Female

BODY LENGTH. 8.2–8.4 mm.

HEAD. Wider than long. Integument black, mandibles dark brownish to reddish. Face irregularly and sparsely covered with brownish hair, more densely around the basis of the antennae. Ocelli in line with posterior margin of compound eyes. Clypeus medially with shallow longitudinal depression; punctation fine and regular (i = 1.5–3 d); surface between punctures smooth and shiny ( Fig. 48B ). Malar area medially narrow, slightly curved. Antennal flagella ventrally yellow, dorsally black. Supraclypeal area at upper margin slightly emarginated and edges slightly extended.

MESOSOMA. Integument black, pronotal lobe dark black. Scutum coarsely and regularly punctate (i = 0.5–1.5 d); surface between punctures smooth and shiny ( Fig. 48C ). Metanotum about half as long as scutellum. Propodeum with anterior broad and coarse transitional carinae and posterior with fine transverse carinae ( Fig. 48D ). Scutum, scutellum, metanotum, mesepisternum and propodeum sparsely covered with long, brownish to greyish, erect hair.

WINGS. Yellowish-brown, stigma and wing venation brownish ( Fig. 48A ).

LEGS. Integument brownish, fore tibia with yellow spot. Vestiture greyish-white, scopa brownish ( Fig. 48A ).

METASOMA. Integument black; T2–T3 and part of T1 yellowish-brown. T3 anterior of premarginal line at least laterally row of hairs; T4 completely haired, basally more densely and shorter than apically; prepygidial and pygidial fimbriae dark brownish to black ( Fig. 48E ). T1 impunctate ( Fig. 48F ); discs of T2–T3 almost impunctate, single shallow punctation at most; T3 anterior of premarginal line with row of points. Surface of metasoma matt ( Fig. 48E ).

Male

BODY LENGTH. 7.4–8.1 mm.

HEAD. Wider than long. Integument black, mandibles dark brownish to reddish. Face densely covered with long, white, erect hair. Ocelli slightly behind posterior margin of compound eyes. Malar area medially narrow, slightly curved. Antennal flagella ventrally yellow, dorsally black.

MESOSOMA. Integument black, pronotal lobe dark brownish to black. Scutum irregularly punctate, laterally denser (i ~ 0.5 d) than medially (i ~ 1 d); surface between punctures smooth and shiny ( Fig. 49C ). Propodeum basolaterally with coarse carinae, medially rugulose-areolate ( Fig. 49D ). Scutum, scutellum, metanotum, mesepisternum and propodeum sparsely covered with long, brownish to greyish, erect hair.

WINGS. Yellowish-brown, stigma and wing venation brownish ( Fig. 49A ).

LEGS. Integument brownish, fore and mid tibia with yellow spot. Vestiture greyish-white ( Fig. 49A ).

METASOMA. Integument brownish, marginal zone yellowish-brown shimmering. Disc of T1 without hair ( Fig. 50A ), T2–T4 basolaterally greyish, sparse, short, erect hair field; T2–T4 anterior of premarginal line with row of short, erect, greyish hair ( Fig. 49D ). T1 regularly (i = 1–1.5 d) punctate ( Fig. 50A ). T2– T4 basally more densely (i = 0.5 d) and finer punctate than apically (i = 1–2 d); medially more densely than laterally; dense punctation of T2 covers half of tergum; T2–T3 anterior of premarginal line with row of points; surface between punctures smooth and shiny ( Fig. 49D ).

TERMINALIA. Genitalia ( Fig. 50B ), S7 ( Fig. 50C ) and terminal plate of S8 ( Fig. 50D ) as illustrated.

Distribution

Coastal areas in the south of the Greater Cape Floristic Region.

Floral hosts

Unknown.

Seasonal activity

September.

Remarks

Eardley (1996) synonymised this species with S. nitidus .

Figures

Fig. 48. Scrapter semirufus Cockerell, 1932, ♀. A. Lateral view. B. Head (dorsal view). C. Scutum and scutellum (dorsal view). D. Metanotum and propodeum (dorsal view). E. Metasoma (dorsal view). F. Terga 1–2 (dorsal view).

Fig. 49. Scrapter semirufus Cockerell, 1932, ♂. A. Lateral view. B. Scutum and scutellum (dorsal view). C. Metanotum and propodeum (dorsal view). D. Metasoma (dorsal view).

Fig. 50. Scrapter semirufus Cockerell, 1932, ♂. A. Terga 1–2 (dorsal view). B. Genitalia (dorsal view). C. Sternum 7. D. Sternum 8.