| Fig. 53. | Fig. 54. |
 | |
portion of its lateral lamina a bright yellow or orange spot, and a blotch of the same tint on the median portion of its posterior border. Occasionally this is so prolonged as almost to give the idea of a continuous transverse band. The first scutum has two central markings, situated the one on its anterior, and the other on its posterior border. These are so shaped and joined together as to suggest the idea of an hour-glass. The anal scutum is triangular and somewhat elongate. It is yellow, but has a dark spot on each side, and its truncate apex is tipped with brown. The head is chestnut-brown. Its vertex is deeply canaliculate, and its inferior lip distinctly emarginate and fringed with hairs. The antennæ are light-brown, slender, and not at all clavate. The feet are light-yellow, with their distal portion somewhat pilose and occasionally tipped with brown. The male genital appendages (Fig. 53) are very large and robust. Their terminal spine is simple, long, slender, and irregularly bent upon itself. They are also furnished with a small, nearly straight, spinule, placed proximally as to the terminal. The female appendages (Fig. 54) are short, thick, and bulbous. On one side of each there is an opening, with two projecting plates separated from one another by a linear orifice. I have seen a male and female, which were collected by Mr. E. D. Cope in Susquehanna County, Pennsylvania. They are about two inches long.
P. crassicutis.
P. maximus, robustus; scutis enormiter subrude punctatis; appendicibus masculis (Fig. 55), singula spinis quatuor, duobus magnis, parvis duobus armata.
Very large, robust; scuta irregularly, subrudely punctate; male appendages each armed with four spines; two large, two small.
P. crassicutis, Wood, Proc. Acad. Nat. Sci., 1864, p. 7.
Fig. 55
The color of all the specimens is light-testaceous, with, in many, a dark dorsal line. It is very possible that the alcohol, in which they have been long preserved, may have destroyed the original color. The animal is very large and robust, and has its outer armor and side plates very heavy. The head on its upper surface has a distinct median furrow, and on its lower a broadly linear, oblique depression on each side. The inferior margin is rather broadly and deeply emarginate. The lateral laminæ are rather short. The female appendages (Fig. 40) are a pair of small, pyramidal, pilose bodies, whose apices are split into three or four very minute mameloid processes. The male organs are
