 . Maddison W.P. 1996. Bulletin Museum of Comparative Zoology, 154 (4): 330, f 23, 38, 51. By courtesy
|  . Maddison W.P. 1996. Bulletin Museum of Comparative Zoology, 154 (4): 330, f 23, 38, 51. By courtesy
|  . Maddison W.P. 1996. Bulletin Museum of Comparative Zoology, 154 (4): 330, f 23, 38, 51. By courtesy
|  . Maddison W.P. 1996. Bulletin Museum of Comparative Zoology, 154 (4): 330, f 23, 38, 51. By courtesy
|  Kaston B. J. 1948. Bull. Conn. St. geol. nat. Hist. Surv. 70: 496, t 100 f 1874-75.
|  Kaston B. J. 1948. Bull. Conn. St. geol. nat. Hist. Surv. 70: 496, t 100 f 1861-1862.
|
 Xerox copy of a drawing by W. Maddison. By courtesy
|  Peckham G.W., Peckham E.G. 1909. Trans. Wisc. Acad. Sci. Arts Let., 16 (1): 597, t 50, f 7, t 51, f. 10.
|  Peckham G.W., Peckham E.G. 1909. Trans. Wisc. Acad. Sci. Arts Let., 16 (1): 597, t 50, f 7, t 51, f. 10.
|  O. P.-Cambridge 1901. Biologia Centrali-Americana, Zoologia. 1: 162, t 19, 17.
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