Cryptorhynchus helvus LeConte, 1878

Anderson, Robert S., 1807, A Review of the Genus Cryptorhynchus Illiger 1807 in the United States and Canada (Curculionidae: Cryptorhynchinae), The Coleopterists Bulletin 62 (1), pp. 168-180 : 172-173

Cryptorhynchus helvus LeConte

( Figs. 3–4 , 12 , 16 , 22 )

Cryptorhynchus helvus LeConte 1878:431

Sternochetus woodruffi Sleeper 1955:59 , new synonymy

Natural history. Blatchley and Leng (1916) report that it is very rare on dead vines.

Distribution. Fig. 22 . This species is found in the United States in FL, GA, NY, OH, SC, VA (O’Brien & Wibmer 1982; specimens examined herein).

Diagnosis. Body length 6.5–8.7 mm ( Figs. 3–4 ). Head above each eye with small glabrous shiny tubercle. Pronotum with only appressed scales. Femora long and slender, each with single tooth situated at about distal 1/3 of length. Elytra with weakly developed concentrations of dark appressed or suberect scales on intervals 3 and 5 near base and at about midlength, not developed as distinct tufts. Male ventrite 5 ( Fig. 12 ) broadly shallowly impressed medially; ventrite 1 unmodified. Aedeagus ( Fig. 16 ).

Taxonomic notes. The allotype female of Sternochetus woodruffi Sleeper has been examined (FSCA) and does not distinctly differ from other examined females of C. helvus . Sleeper (1955) mentioned the distinctive form of the antennal funiculus but I can see no differences between the allotype and other specimens of C. helvus on hand. Similarly, he mentions a black crest of scales along elytral interval 3 near the base. This is evident on the allotype but similar, although shorter and not as distinct, scale patches are present on other C. helvus . The ventral triangular impunctate area at the middle of the basal margin of ventrite 5 is present on all specimens examined. Sleeper described Sternochetus woodruffi from Ohio noting that all C. helvus on hand were from Florida. Perhaps this apparent geographic disjunction factored in his decision to recognize the Ohio form as a different species. The holotype male of Sternochetus woodruffi is in the personal collection of Elbert L. Sleeper and was not available for examination.

Images of the holotype of C. helvus are available at http://insects.oeb.harvard. edu/mcz/FMPro?-DB 5 Image.fm&-Lay 5 web&-Format 5 images.htm&Species_ID 5 5325&-Find

Specimens examined. UNITED STATES: Georgia. Newton, Emory University Field Station , 2.vii.1936 ( CMNC) . North Carolina. Columbus County, 14– 21.vii.1952, light trap ( CMNC) . Ohio. Licking County, Cranberry Bog, Buckeye Lake , 20.vi.1953, R. E. Woodruff (Allotype, FSCA) . Virginia. Dismal Swamp ( USNM) . Lake Drummond ( USNM) . Point Lookout ( USNM) .

Figures

Figs. 1–6. Dorsal and lateral habitus of Cryptorhynchus species. Figs. 1–2) Cryptorhynchus fuscatus; Figs. 3–4) Cryptorhynchus helvus; Figs. 5–6) Cryptorhynchus obliquus. Scale bar 5 1 mm.

Figs. 11–15. Ventrite 5 of male Cryptorhynchus species. 11) Cryptorhynchus fuscatus; 12) Cryptorhynchus helvus; 13) Cryptorhynchus obliquus; 14) Cryptorhynchus lapathi; 15) Cryptorhynchus tristis. Scale bar 5 0.5 mm.

Figs. 16–20. Aedeagus of Cryptorhynchus species. 16) Cryptorhynchus fuscatus. Scale bar 5 0.8 mm; 17) Cryptorhynchus helvus. Scale bar 5 1.0 mm; 18) Cryptorhynchus obliquus. Scale bar 5 1.0 mm; 19) Cryptorhynchus lapathi. Scale bar 5 0.8 mm; 20) Cryptorhynchus tristis. Scale bar 5 0.8 mm.

Figs. 21–25. Maps of distribution of Cryptorhynchus species by state and province only.