Homeolabus analis (Illiger)

Young, Julia Janicki Daniel K., 2021, Survey of the Attelabidae of Wisconsin (Coleoptera: Curculionoidea), Insecta Mundi 2021 (891), pp. 1-61 : 9-11

Homeolabus analis (Illiger)

( Fig. 7–8 )

Diagnosis. Homeolabus analis can be distinguished from Synolabus species by the larger size and by the untoothed prothoracic femora. It is most similar superficially to S. nigripes given the occasional overlap in size (between the range 4.0– 4.5mm) and the red dorsum, but can be distinguished by the black thoracic sterna (red in S. nigripes ). This species can be distinguished from H. pubescens by the glabrous body.

Description. Length 3.2–6.7mm. Integument black to reddish black; pronotum, elytra, abdomen, and sometimes base of head reddish orange, varying from yellow orange to dark reddish brown. Vestiture evident on head and lateral areas of elytra, rest of surface glabrous. Head with sides parallel from base to eyes; surface densely punctured, with median groove flanked on each side by 1 impressed groove, grooves extending from areas near antennal insertions to above eyes, areas between grooves elevated into 2 divergent carinae. Rostrum about half as long as head, constricted at antennal insertion; apex expanded and inflated, width about 1.7–1.8× width of frons; submentum of male with 2 blunt teeth, of female without teeth. Antennae inserted dorsolaterally on basal 1/3 of rostrum. Pronotum width 1.3× length, widest at base; weakly arcuate laterally, strongly converging to sinuate apex; disc evenly convex, not impressed; surface shining, smooth, with widely scattered, very minute punctures. Elytra width at base 1.2× pronotal width, broadly rounded apically; striae not impressed, with large, shallowly impressed, widely separated punctures in nearly regular rows; interstriae smooth, shining, with obscure, fine, minute punctures and lines.

Natural history. This species is generally associated with oak ( Quercus spp. ). Further natural history and behavioral information can be found in Hall and Buss (2007).

Phenology. In Wisconsin, adults have been collected in June and July.

Collection methods. Sixty-seven Wisconsin specimens were examined during this study from 14 counties. One specimen was collected on the leaf of a 2–feet tall oak scrub, others were hand collected from scrub oak, oak leaves, or oak trees in general.

Distribution. United States. AL, AR, CT, DC, FL, GA, IA, IL, IN, KS, MA, MD, ME, MI, MO, MS, NC, NH, NJ, NY, OH, OK, PA, RI, SC, TN, TX, VA, WI, WV. Canada. MB, ON.

Wisconsin county records. This species has previously been recorded from Wisconsin ( O’Brien and Wibmer 1982; Downie and Arnett 1996). Adams, Crawford, Dane, Dodge, Grant, Iowa, Jackson, Marquette, Monroe, Richland, Sauk, Waukesha, Waushara, Wood.

Subfamily Rhynchitinae Gistel

Tribe Rhynchitini Gistel

Figures

Figures 7–8. Homeolabus analis (Illiger). 7) Habitus, dorsal view. 8) Habitus, lateral view.