Eumenes flavitinctus Bohart, 1950

Grandinete, Yuri Campanholo, Noll, Fernando Barbosa & Carpenter, James, 2018, Taxonomic Review of Eumenes Latreille, 1802 (Hymenoptera, Vespidae, Eumeninae) from the New World, Zootaxa 4459 (1), pp. 1-52: 22-23

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Eumenes flavitinctus Bohart, 1950


Eumenes flavitinctus Bohart, 1950  , Revised Status

Eumenes crucifera flavitinctus Bohart, 1950  , 63: 79.

Type data: Holotype male CUIC. Paratype female at USNM; Three paratypes (two females and one male) at UCD.

Type locality: “ Blythe , California ”. 

Bohart, 1951: 884 (cat.).

Krombein, 1979: 1507 (cat.).

MacLachlan, 1980, 53: 618, 621 (key).

Distribution: USA (CA).

Comments and diagnosis. Eumenes flavitinctus  was considered a subspecies of E. crucifera  , but we propose herein to treat it at the specific level, based not only on the extreme color difference, but also the following features in comparison to E. crucifera  : pubescence shorter along body, especially on T1 and T2; pubescence on anterior face of coxae clearly shorter; and T1 long and slender. All the records for this species are restricted to southern California.

Redescription. Eumenes flavitinctus Bohart, 1950  , Revised Status ( Fig. 14 View Figure )

Female. Color, head: Yellow marks: mandibles; labrum (slightly darkened); clypeus; inter-antennal region and above it up to ocular sinus level; a broad band from the base of clypeus to the ocular sinus; gena; scape. Black marks around the ocelli. Frons (except for where yellow and black marks are) brownish. Pedicel and flagellum brownish with blackish marks mostly on apical flagellomeres. Mesosoma: entirely yellow. Mesoscutum brownish, except for a yellow triangular mark on each side of it and small marks on center. Brownish marks on posterior portion of dorsal face of pronotum. Brownish and translucent marks on central area of tegula. Legs brownish with brownish marks on coxae and distal region of femora. Tibiae and tarsi yellow, although the tarsi become brownish towards apex. Metasoma: T1 brownish with yellow spots on each side of middle region and a transverse yellow band on apex. T1 yellow with brownish mark on basal region and a transverse band on middle area, running towards lateral margins. T3–T6 and S2–S6 yellow. Wings: Hyaline, with costal, medial and submedial cells yellowish. Pterostigma and veins brownish.

Pubescence, head: Frons, vertex and occipital region with moderately long and golden pubescence. Clypeu with moderately long golden pubescence (shorter than on frons), becoming shorter towards apex. Short (shorter than on frons) golden pubescence on gena. Mesosoma: covered with moderately long (slightly shorter than on frons) pubescence: golden on pronotum and mesoscutum; scutellum, metanotum, posterior face of propodeum and lateral of mesosoma whitish pubescence. On posterior face of propodeum the pubescence becomes as long as on frons. Basal half of fore femur with scattered erect golden bristles. Metasoma: Covered with and golden pubescence. On T1 the pubescence is longer on basal half, becoming shorter towards apex (better observed in lateral view); T2 with short pubescence on basal region, becoming shorter towards apex (both ways shorter than T1); S2 with very short pubescence and some scattered erect bristles; T3–T6 and S3–S6 also with short pubescence and long bristles on apex region.

Surface of integument, head: Clypeus and gena with coarse punctation (hard to observe due the yellow color); frons and vertex with coarse and dense punctation, becoming sparser behind the ocelli. Mesosoma: Covered with coarse and dense punctation (as on frons). Metasoma: Basal third of T1 without evident punctation; apical two thirds with coarse and moderately dense punctation (sparser than on mesosoma); T2 with coarse punctation on dorsal surface, moderately dense on basal half (as on T1), becoming denser on apical half. On the lateral margins the punctation becomes weaker and very sparse. S2 with scattered evident punctures. T3–T5 with evident punctures (as on S2), moderately dense. T6, S3–S6 with weak punctures.

Structure, head: Labrum with the apex rounded; clypeus convex, longer than wide, with the apex concave forming two projections, rounded, with weak carinae on apex. Inter-antennal region with a protuberance on center area; lateral ocelli closer to the compound eye than to each other; occipital carina well developed, angled on middle region of gena and moderately distant to the compound eye next to the mandibles. Mesosoma: Pronotal carina present dorsally and laterally; pronotal fovea present; posterior projection of the tegula weakly developed, rounded; parategula lamelliform; posterior face of propodeum moderately concave. A short carina on upper region of the external face of the fore coxae. Metasoma: T1 slender, about three times wide than long ( Fig. 34 View Figure ), weakly swollen in dorsal view, with the lateral margins on apical half slightly concave. T2 wider than long with the lateral margins strongly concave ( Fig. 50 View Figure ). Apex of T2 with a well-developed lamella, becoming reduced towards lateral margins. Basal angle of T2, in lateral view, rising up abruptly.

Male: Clypeus narrower than females; F11 long, basally broad, with the apex pointed surpassing the apical edge of F8 ( Fig. 84 View Figure ). Dorsal surface with a weak longitudinal carina. Ventral surface without erect bristles. Pubescence, punctation and other structure as in females.

Male genitalia: Aedeagus as in figure 100a, b. Paramere ( Fig. 100c View Figure ) with long bristles on middle region of gonostyle; digitus long with short bristles sparsely distributed ( Fig. 117 View Figure ); cuspis with moderately long and erect bristles (longer than on digitus); volsella with long bristles on the ventral edge and scattered short bristles; distal lobe truncate, without bristles.

Variation: Brownish marks that vary in size may be present on the mesepimeron and the anterior and posterior regions of the mesepisternum. Yellow marks on the mesoscutum and T 1 may be more developed. One of the paratypes has the body entirely reddish, but we believe this to be an artifact of the conservation of the specimen (“cyaniding”). This was also observed in other species with yellow markings.

Type material. The paratype female (USNM) is in good condition and bears the labels: ‘Blythe, Calif. \ Riverside Co. \ VII.30.1947’ ‘J. W. MacSwain \ Collector’ ‘ Eumenes  \ crucifera  \ flavitinctus  \ R. Bohart’ ‘[Red Label] Paratype No. \ 611.50 \ U.S.N.M.’. The three paratypes (two females and one male; UCD) are in good and bear the labels, respectively: ‘Palm Springs \ Riverside Co., Calif \ VI-22-1945 ’ ‘Hiptioemoryi’ ‘ Eumenes  \ crucifera  \ flavitinctus  \ R. Bohart’ ‘ Eumenes  \ crucifera  ♀ \ flavitinctus Boh  \ det. R. M. Bohart’; ‘Blythe, Calif. \ Riverside Co. \ VII.30.1947’ ‘J. W. MacSwain \ Collector’ ‘ Eumenes  \ crucifera  \ flavitinctus  \ R. Bohart’; ‘Blythe, Calif. \ Riverside Co. \ VII.30.1947’ ‘J. W. MacSwain \ Collector’ ‘ Eumenes  \ crucifera  Ƌ \ flavitinctus  \ R. Bohart’.