Macrosiagon sayi (Le Conte 1858)

Macrosiagon sayi (Leconte)
1823. Rhipiphorus bicolor Say, Jour. Acad. Phila., in, p. 275, (Complete Writing
n, 1859, p. 162.) Preocc. 1858. Rhipiphorus sayi Leconte, Jour. Acad. Nat. Sci. Phila.. iv, p. 21. 1875. Rhipiphorus octomaculatus sayi Horn, Trans. Am. Ent. Soc, V, p. 123.
Horn considered this species as a variety of octomaculatum Gerstacker; but for the reasons indicated below, it should be considered as a distinct species. The sexes are distinctly different in color, while in octomaculatum that is not the case. The legs in this species are concolorous and do not vary in color as is the case in the varieties of octomaculatum. The form of the apex of the tarsal segment differs entirely from that in octomaculatum and in general structure it is more delicate.
Head black in the males, red in females; antennae fuscous, first and second segment red. Pronotum red in both sexes; elytra of male testaceous, with base and tip black; sometimes an indistinct spot is present in the middle. Female antennae with three brownish black spots usually confluent with each other to form a curved line extending from base to apex. Thorax beneath, black in the males and dark brown in the females. Abdomen in the males black, in the females red. Legs in both sexes dark brown.
Vertex broadly truncate, occiput pubescent, with occipital suture present, this is sometimes indistinct, front surface sparsely punctate with median smooth line, clypeus more closely punctate. Pronotum punctured, posterior lobe acute, with a smooth elevated median line extending from its apex anteriorly. This is sometimes obsolete. Thorax beneath very densely punctured and pubescent. Hind tarsus with second segment shorter than third. The apices of the tarsi, especially of the second segment, are produced on both sides into lobe-like projections (see PI. Ill, fig. 18).
Length 7 to 11 mm.
Distribution. — New Jersey, Pennsylvania, Delaware, District of Columbia, Virginia, North Carolina, Florida, Louisiana, Kansas, Missouri, Illinois, Arizona and California.
Say described this species as bicolor from Pennsylvania, and

Macrosiagon sayi is a species of wedge-shaped beetle in the family Ripiphoridae. It is found in North America.