Balaninus flavescens Roelofs 1874

Frank W. Pelsue, Jr. & Zhang, Runzhi, 2000, A Review Of The Genus Curculio L. From China With Descriptions Of New Taxa. Part I (Coleoptera: Curculionidae: Curculioninae: Curculionini), The Coleopterists Bulletin 54 (2), pp. 125-142 : 133-136

Balaninus flavescens Roelofs 1874

Recognition Characters. Broadly oval; first segment of funiculus almost three times as long as second segment. Club of antennae longer than first and second segments combined with a fringe of fine setae on the anterior margin; rostrum as long as body; color of derm black with decumbent ocherous and white scales; elytra with two mid and posterior ocherous fascia; legs black with elongate, decumbent, white scales.

Description. Female. Length: 4.4–4.8 mm (mean 5 4.6). Width: 2.3–2.7 (mean 5 2.5). Head. Large slightly convex; derm piceous; punctures small, nude dorsally; a few small decumbent white scales around ventral margin of eyes; eyes large, oval with fine facets; frons 0.28 as broad as head across eyes, narrower than base of rostrum; punctures small and close together with few scales. Rostrum. Length 4.5–4.8 mm (mean 5 4.65); as long as body; fuscous basally, more furugino­testaceous apically; cylindrical, sides parallel past base; abruptly emerging from head; lacking dorsal carina; punctures small, oval, denuded; straight with a dip midway then abruptly curving in last one quarter of its length; scrobe lateral, inserted in basal one third. Antennae. Length: Scape 1.2 mm; funicular segment one 0.7 mm; two 0.25 mm; three 0.1 mm; four 0.1 mm; five 0.1 mm; six 0.1 mm; seven 0.1 mm; club 1.0 mm; funicle 1.45 mm; scape 0.83 as long as funicle; derm fuscous; densely clothed with narrow, elongate, decumbent, white scales, a few semierect setae toward apex of each segment; club elongate, linear with fringe of fine setae on anterior margin; first two segments 0.3 mm each, last two short. Thorax. Length 1.5 mm. Width 2.2 mm. 0.69 as long as broad; derm fuscous; disc convex in lateral view, sides angled to constriction, base almost as broad as base of elytra; punctures small, close together, clothed with ocherous, clavate, decumbent scales basoanteriorly, narrower elongate, decumbent, white scales dorsolaterally with mixture of ocherous and white scales, impressed laterally; base sinuate; ocherous macula present proximal to scutellum; scutellum small about as broad as long, set in declivity, clothed with small, narrow, white scales; mesosternal intercoxal process feebly prominent; mesepimeron, mesepisternum, metepeisternum densely clothed with ocherous, decumbent scales; two basolateral ocherous macula present not well defined; procoxae clothed with narrow, clavate, decumbent, white scales anteriorly and broader clavate, decumbent, ocherous scales posteriorly. Elytra. Length 3.0 mm. Derm piceous; striae narrow seem to lack scales; humeri not prominent, rounded; intervals broad, flat, clothed with clavate ocherous, fuscous, and narrow, elongate, white, decumbent scales, with two defuse ocherous fascia, one at the midpoint second toward apex; disc flat in lateral view; crosshatch setae short not prominent. Legs. Length of hind femur 2.4 mm, exceeding apex of abdomen, tooth medium, acute; profemur 2.5 mm in length, tooth medium; mesofemoral tooth small; all legs black with dense, narrow, elongate, decumbent white scales; hind tibia straight, distal comb long ascending up posterior margin one­quarter of length; pro­, meso­, and metauncus large longer than tarsal claw; tarsal segments one to three broad, clothed with elongate, white, decumbent setae. Abdomen. Derm piceous; sternite one longer than two behind coxal cavity; sternite two ascending to three; sternites three and four approximately same length, combined longer than sternite five; sternite five with acute apex and narrow apical declivity; sternites one and two clothed with clavate decumbent ocherous scales, three through five with narrow elongate white scales. Pygidium . Slightly exposed with short fringe of setae. Genitalia. Spermatheca: Ramus bluntly rounded, collum just a knob with cornu thick and curved with blunt apices ( Fig. 35).

Plant Associations. Unknown.

Distribution. Japan; Russia; China, Yunnan Province, Xishuangbanna, 650 M, 08–21 June 1958, F. Pu; Vietnam, Tonkin, Hoa­binh, July 1940, A. Cooman. Two specimens examined.

Remarks. This species was described by Roelofs from Japan and has since been discovered in China. This represents a new distribution record.

Curculio beverlyae Pelsue and Zhang , new species Figs. 6, 16–17, 27–28

Holotype. China. Kunming : male [ China: Yunnan /Kunming/ 13 August 1958 / H. Li] ( IZAS)

Paratype. (1) China: male [ China: Yunnan / Kunming / 13 August 1958 / H. Li] ( FWPC)

Recognition Characters. Oblong oval. Vestiture tan with testaceous mac­

ula; funicular segment one shorter than segment two, glabrous, club small, fuscopiceous. Tooth on hind femur large, wedge shaped with apex reaching posterior margin of tibia. Length of hind femur barely exceeding apex of abdomen. Clavate dirty white decumbent scales on lateral pleura of pronotum, narrower and intermixed with fuscopiceous decumbent scales on dorsum. Mesosternal intercoxal process prominent. Rostrum gradually emerging or continuous with head, thicker at base gradually narrowing toward apex.

Description. Male. Length: 5.6–6.6 mm (mean 5 6.1). Width: 3.0– 3.6 mm (mean 5

3.3). Head. Moderately large round; derm fuscous; punctures small with small, narrow, elongate, decumbent, ocherous scales; eyes large, round, finely faceted; frons 0.19 as broad as head across eyes, clothed with longer narrow, elongate, ocherous and a few testaceous scales; central shallow interocular fovea. Rostrum. Length: 3.2 mm, 0.53 as long as body; basely piceous to antennal insertion apically fuscopiceous; cylindrical; sides subparallel, somewhat thick to antennal insertion then gradually narrowing to apex; gradually emerging from head; three dorsal carinae from frons to antennal insertion; rather straight to antennal insertion then arced to apex; scrobe lateral; scape inserted past midpoint. Antennae. Length: Scape 1.5 mm bulb with a few ochorous scales; funicular segment one 0.36 mm; two 0.44 mm; three 0.24 mm; four 0.2 mm; five 0.24 mm; six 0.2 mm; seven 0.24 mm, club 0.48 mm; funicle 1.8 mm; scape 0.84 as long as funicle; derm fuscorufous; clothed with few narrow, elongate, decumbent, ocherous scales toward apices of each funicular segment with longer erect setae like scales; club small, compact, oval, segments one and two equal in length with velvety vestiture few erect setae. Thorax. Length: 1.5 mm. Width: 2.4 mm, 0.63 as long as broad; derm fuscous; disc narrower at base than middle, base straight, sides subparallel broadly rounded to constriction; impressed laterally; disc with small deep punctures close together; scales on lateral margin narrow, elongate, decumbent, ocherous becoming shorter and narrower dorsally, some testaceous scales intermixed with ocherous scales concentrated basolaterally forming feeble macula; base straight; mesosternal sternal intercoxal process prominent, clothed with clavate, decumbent, ocherous scales; scutellum medium, longer than broad, clothed with short, narrow, elongate, decumbent, ocherous scales; mesepimeron, mesepisternum, and metepisternum evenly clothed with clavate, decumbent, ocherous scales; procoxae clothed with clavate, ocherous scales. Elytra. Length: 3.8–4.4 mm (mean 5 4.10); derm fuscous; stria narrow, shallow, punctures with short, clavate, ocherous scales; shallow declivity around scutellum; humeri prominent, rounded; intervals broad, flat clothed with mixture of clavate and narrow, elongate, decumbent, ocherous and testaceous scales; diffuse vittae of testaceous scales at midpoint, scattered testaceous scales toward apex; disc convex in lateral view; crosshatch setae short luteous with a few fuscous setae mixed. Legs. Length of hind femur 2.5–2.7 mm (mean 5 2.6), exceeds apex of abdomen, tooth large, wedge shaped, somewhat robust; pro­ and mesofemoral tooth medium, acute; derm fuscopiceous; all femora clothed with elongate, narrow, decumbent, ocherous scales; pro­, meso­, and metauncus small, shorter than tarsal claw; tibia nearly straight; tarsal segment four one quarter longer than three. Abdomen. Derm piceous; sternite two longer than one behind coxal cavity; sternite one with median declivity; sternite two ascending to three; sternites three and four combined longer than five; sternite five with emarginate apex, apical declivity, one lateral tuft of ocherous setae on each side. Pygidium . Clothed with long narrow ocherous setae extending beyond apex of elytra. Genitalia. Median lobe of aedeagus 1.80 mm long, 0.50 mm wide, longer than apodeme which is 1.70 mm in length; median lobe gradually tapering to apex and arcuately curving downward ( Fig. 28 ); dorsally lateral margins of even thickness, broader basally, narrowing apically ( Fig. 27 ).

Plant Associations. Unknown.

Distribution. China, Yunnan Province, Kunming; 13 August 1958, H. Li Collector. Two specimens examined.

Remarks. This species appears to be very similar to C. conjugalis (Faust) which is found in Japan. It can be separated from that species by the male genitalia. The median lobe is longer than the apodeme in C. beverlyae the reverse being the case in C. conjugalis . The apices are abruptly tapered to a blunt point in C. conjugalis whereas gradually tapered in C. beverlyae , as seen in Morimoto (1962, table 3, figure C’).

Figures

Figs. 27–28. Curculio beverlyae. 27) median lobe, dorsal aspect; 28) median lobe, lateral aspect.