Laricobius bicolor Háva, 2008

Leschen, Richard A. B., 2011, World review of Laricobius (Coleoptera: Derodontidae), Zootaxa 2908, pp. 1-44 : 6-7

2. Laricobius bicolor Háva, 2008

(fig 2)

Diagnosis. Body bicolored. Head dark; ocelli present. Prothorax quadrate without well developed lateral carina, sides not strongly explanate. Pronotum dark; posterior tooth absent. Scutellum dark. Surface of elytra incurvate; elytral punctures posteriorly confluent. Epipleura dark. Ventrites dark. Femora dark. Tibiae dark.

Description. Length 3.04 mm. Body bicolored, mostly black, head, prothorax, scutellum, sides and apices of the elytra, and venter black, central disc of elytra red-brown; antenna tan with AI darker and club darker, palpi tan, femora and tibiae black, extreme base of tibiae and tarsi dark brown. Head with ocelli; u-shaped furrow absent; interocular distance about 2.5x the width of the eye; macropunctures distinctly ovate, somewhat shallowly impressed at middle and more impressed on the frons, scattered and present at the center of the frons; micropunctures coarse; setation short and decumbent, length shorter than 1/2 the width of the eye. Antenna with length of A3 about equal to A4, ratios 1.7:1.5:1.2:1.3:1.4:1.1:1.2:1.0:1.4:1.3:2.2; A11 strongly asymmetrical. Prothorax quadrate and highly convex, widest at middle, sides weakly constricted apically; about 0.81 x as long as wide (pronotal length/greatest pronotal width = 0.81); depth = 0.44 mm; pronotum not explanate, lateral carina without a distinct sharp edge; anterior angle acute, deflected, and forming a large lateroventrally directed tooth (the angle formed between the anterior margin and lateral carina, excluding the tooth, is about 65°); posterior angle indistinct and broadly rounded and without a short tooth; anterior and posterior foveae visible only in lateral view; macropunctures ovate, deep, well separated to contiguous; micropunctures coarse; setae decumbent short and about half the width of eye. Elytra about 2.95 x as long as wide (elytral length/greatest elytral width = 2.95) and 3.47 x as long as pronotum (elytral length/pronotal length = 3.47); surface incurvate at basal third; macropunctures, especially of stria 1, coalescing posteriorly to form grooves, separated by an average of ½ to 1 puncture diameter; micropunctures fine; microsculpture not visible; setae suberect and shorter than half length of the eye.

Comments. Laricobius bicolor is the only species with bicolored elytra lacking an explanate pronotum. This species was described based on a single female.

Distribution. China: Sichuan.

Type material examined. HOLOTYPE ( APUC). 1 female (card mounted and dissected), China: W Sichuan, Ya´an Prefecture, Tianquan Co., E Erlang Shan Pass/ 2900 m, 22.vi.1999 29.52.36N, 102.17.82E. leg A. Pütz/ Sammlung Andreas Pütz Eisenhüttenstadt (yellow label)/ Laricobius sp. n. (hw) det. A. Pütz 2006 (hw)/ HOLO- TYPE Ƥ Laricobius bicolor sp. n. (hw) Jirí Háva 2007 (red label).