1090 Wisconsin Academy of Sciences, Arts, and Letters. 
From the description it is impossible to establish the identity 
of virido-signatus of Miss Byrnes, but it would seem that this 
is probably a larval form of either albidus or fuscus with the 
•chances in favor of albidus. 
CYCLOPS FUSCUS Jurine. 
Plate LXXVII, figs. 1-7. 
1820. 
Monoculus quadricornis fuscus Jurine, p. 47, pi. II, fig. 2. 
1841. 
Cyclops signatus Koch, H. 21, pi. VIII. 
1850. 
1857. 
4 4 
quadricornis var. c. Baird, p. 203, pi. XXIY, fig. 5. 
corona tus Claus, p. 29, pi. I, fig 5, pi. II, figs. 1-11. 
1863. 
< < 
“ “ p. 97, pi. II, fig. 16, pi. X, fig. 1. 
1863. 
signatus Sars, p. 242. 
1863. 
4 4 
coronatus Lubbock, p. 199. 
1870. 
4 4 
“ Heller, p. 71. 
1872. 
4 4 
“ Fric, p. 218, fig. 11. 
1876a. 
“ Hoek, p. 12. 
1876b. 
4 4 
“ Hoek, p. 129. 
1878. 
4 4 
signatus Brady, p. 100, pi. XVII, figs. 4-12, 
1882. 
4 4 
tenuicornis Herrick, p. 227, pi. V, fig. 14, pi. VI, figs. 1-11, 
and 20. 
1884. 
4 4 
“ Herrick, p. 153, pi. R, fig. 16, pi. Q\ figs. 8-11, 
and 21. 
1885. 
1886. 
4 4 
signatus Daday, p. 208. 
“ Vosseler, p. 189, pi. IV, figs. 1-5. 
1888. 
4 4 
fuscus Sostaric, p. 58. 
1890. 
4 4 
signatus Thallwitz, p. 79. 
1890. 
4 4 
“ Lande, p. 33, pi. XV, figs. 1-12. 
1891. 
4 4 
fuscus Schmeil, p. 22. 
1891. 
4 4 
“ Richard, p. 223, pi. VI, fig. 6. 
1891. 
4 4 
signatus Brady, p. 6, pi. II, fig. 5. 
1892. 
4 4 
fuscus Schmeil, p. 123, pi. I, figs. l-7b, pi. IV, fig. 2. 
1893. 
4 4 
signatus Marsh, fuscus included under this. 
1895. 
signatus var. coronatus Herrick and Turner, p. 106, pi. XV, 
figs. 1-4. 
1895. 
4 4 
fuscus Marsh, p. 16, pi. VI, figs. 5, 7 and 11. 
1897. 
4 4 
coronatus Matile, p. 120, pi. II, figs, 1, 2 and 3. 
1901. 
4 4 
fuscus Lilljeborg p. 44, pi. Ill, figs 12-15. 
1903. 
4 4 
“ Graeter p. 473, pi. 15, fig. 37. 
1905. 
4 4 
“ Pearse, p. 150, pi. XIV, fig. 12. 
1906. 
4 4 
signatus var. coronatus Byrnes p. 193, pi. VII, figs. 1-6, pi. 
VIII, figs. 1-3. 
1909. 
“ •“ “ Byrnes p. 9, pi. II, figs. 1-7, pi. Ill, figs 
1-5. 
The cepbalotborax is oval, narrowing decidedly toward the 
posterior end. Its width is rather more than one-half its 
