Curculio bidens (Heller)

Pelsue, Frank W. & Zhang, Runzhi, 2005, A Review of the Genus Curculio from China with Descriptions of Four New Taxa. Part V. The Curculio dentipes (Roelofs) Group (Coleoptera: Curculionidae: Curculionini), The Coleopterists Bulletin (Bethesda, Md.: 1985) 59 (3), pp. 293-303 : 293-303

Curculio bidens (Heller)

( Figs. 1, 2 , 19 )

Balaninus bidens Heller, 1927:182 . Type. China. Holotype male (SMTD).

Description. Male. length: 4.5–4.7 mm. 2.3–2.4 mm in width. Head: 0.49 as broad as

pronotum; punctures small with small, narrow, elongate, white scales; frons 0.2 as broad as head

across eyes, clothed with small, narrow, elongate, white scales. Rostrum: length 2.7–2.8 mm; 0.57

as long as body; broad at base narrowing to broadened apex; abruptly emerging from frons, but

appearing continuous with frons; median carina flanked by small slit-like punctures to insertion of

scape; located dorsally, just before insertion of scape, flat triangular area with central deep puncture;

apex broad as base; evenly deflected from base to apex; scrobe lateral; scape inserted in apical ½.

Antennae: length: scape 1.3 mm, funicle 1.4 mm, club 0.45 mm; scape 0.93 as long as funicle;

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296 9–10. Curculio dhilloni n. sp. Female, habitus dorsal and lateral views, holotype. Fig. 10. Arrow

indicates medium tooth. Figs. 11–12. Curculio imperalis Female, habitus dorsal and lateral views.

Various scales.

funicular segment 1 as long as 2, 3 subequal to 2 longer than 5–7, 7 not as long as segment 1 of club; club longer than funicular segments 4–7; funicular segments clothed with narrow, elongate, white scales. Thorax: length: 1.3 mm; width: 1.7 mm; 0.76 as long as broad; margins gradually rounded to constriction; disc with median carina, clothed with small, narrow, fuscous scales with larger, narrow, clavate, white scales set in small punctures scattered over disc; base subsinuate; somewhat convex in lateral view; pleuron with more clavate ochraceous scales; anteroventral macula of clavate ochraceous scales; mesosternal intercoxal process feeble; scutellum large, longer than broad, scutate, clothed with ochraceous scales; mesepimeron clothed with clavate ochraceous scales along dorsal and posterior margins with center piceous; mesepisternum densely clothed with broader, clavate, ochraceous scales; metepisternum clothed with small piceous, scattered clavate white scales and small anterior and posterior macula; metasternum clothed with clavate white scales. Elytra: striae narrow, deep, with moderate-sized punctures; shallow scutellar declivity; humeri pronounced, rounded; intervals broad, flat, clothed with small, narrow, piceous and patches of longer, narrow, elongate, acute apices, white scales; crosshatch setae short, suberect, piceous. Legs: pro-, mesofemoral teeth small, metafemur with two teeth, anterior tooth long, acute, posterior tooth wedge shaped with pointed apex; all femora clothed with narrow, elongate, white scales;

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Fig. 14 . Arrow indicates mesosternal intercoxal process not prominent. Figs. 15–16. Curculio

octomaculata n. sp. Female, habitus dorsal and lateral views, holotype. Figs. 17–18. Curculio

kiangsuicus Male, habitus dorsal and lateral views. Fig. 18. Arrow indicates small tooth.

Various scales.

tibiae sinuate, pro-, mesouncus as long as tarsal claw, metauncus absent. Abdomen: sternite 1 as long as 2 behind coxal cavity; 3–4 longer than 2 and 5; 5 truncate apex with 2 long apical white setalike scales; all sternites clothed with clavate white scales. Pygidium : small, clothed with long setalike piceous scales.

Female: length: 4.1 mm. width 2.1 mm. Head: frons 0.22 as broad as head across eyes deep slitlike fovae. Rostrum: length: 3.5 mm; 0.85 as long as body; scape inserted in basal ½ close to midpoint. Thorax: mesosternal intercoxal process prominent. Elytra: patches of broad, clavate white scales with truncate apices. Legs: metatibiae with very small uncus. Genitalia: spermatheca: ramus erect somewhat elongate, broadly truncate; collum broadly rounded apex; cornu thick from collum, abruptly arced to a bluntly rounded apex even with apex of collum ( Fig. 19 ).

Distribution. China: Sichuan Province; Yunnan Province, Kunming, Lijiang.

Remarks. This species is almost identical to C. bidentatus in that both have two teeth on metafemur. How the two differ is unknown to the authors, as they have not seen the type of C. bidentatus , which is from Java with Indonesia as the type locality. Heller (1927) did not give a clue in his description on the differences between the two species.

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298 lateral aspect. Fig. 21. Curculio davidi median lobe, dorsal aspect. Fig. 22. Curculio davidi

median lobe, lateral aspect. Fig. 23. Curculio davidi spermatheca, lateral aspect. Fig. 24. Curculio

dhilloni n. sp. spermatheca, lateral aspect. Fig. 25. Curculio octomaculata n. sp. spermatheca,

lateral aspect. Fig. 26. Curculio imperalis spermatheca, lateral aspect. Various scales.

Figures

Figs. 1–2. Curculio bidens male, habitus dorsal and lateral views. Figs. 3–4. Curculio

Fig. 19. Curculio bidens spermatheca, lateral aspect. Fig. 20. Curculio dentipes spermatheca,

Figs. 13–14. Curculio unimaculata n. sp. Female, habitus dorsal and lateral views, holotype.