occasionally reddish, as also the labrum and anterior margin of first segment. Posterior third of each segment of a shining black. Stigmata and lateral striæ beneath quite conspicuous."
"Remarks.—Resembles more Iulus ornatus than I. marginatus in the general proportions of the body, but in the structure of the antennæ and labrum comes nearer to I. marginatus."
I. atratus, Girard, Marcy's Report, p. 274.
S. uncigerus.
S. læte brunneus, saturate-rubeo-brunneo annulatus; capite sparse minute punctato et corrugato, antico punctorum maximorum serie instructo; segmentis 50—53; scutis supra et copiose punctatis et corrugatis; squama anale triangula.
Bright brown, annulated with deep reddish brown; head sparsely minutely punctate and corrugate, anteriorly furnished with a series of large puncta; segments 50—53; scuta above both copiously punctate and corrugate; anal scale triangular.
S. uncigerus, Wood, Proc. Acad. Nat. Sci., 1864, p. 15.
Fig. 36
The color of this species is a bright brown, with an annulus of dark reddish brown on the posterior border of each segment. The head is distinctly medianly canaliculate, except in the centre, and has the row of dots on its anterior face, as in S. marginatus, but is not as decidedly punctate elsewhere as in that species. The eyes are triangular. The antennæ closely resemble those of S. marginatus, but are, perhaps, rather shorter and more compressed. The first scutum is banded, both anteriorly and posteriorly. The lateral processes, even the female, are almost wanting. The second scutum is produced forwards as in S. marginatus. The male appendages (Fig. 36) are composed of a yoke-like piece and two outer parts, which it connects. The central piece may be described as formed by two plates (although but really one) meeting at an angle in the centre and attached to the outer parts at their other extremities. These outer articles are formed each as follows: First. There is a large plate which is bent around an inner basal piece, and is deeply notched laterally, but is produced anteriorly into a broad, almost rudely punctate plate, and posteriorly into a short, slender process, terminating in an imperfect hook. This last process is sometimes obsolete. Second. Articulating with the
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