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Tåmåsvåry has given fairly good drawings of the flagellum as well 
as the two serrulae of Chthonius orthodactylus Leach (1882, 8, 
tablå V, fig. 6 and 4), but his knowledge as far as the structure 
of the antennae is concerned does not seem to be much deeper 
than that of his most advanced predecessors. 
Thorell in the same year (1882, %, pp. 38—39) in his deserip- 
tion of Chxelifer Javanus Thor. "gives a remarkable good, almost 
perfect account of the antenna of this species, but he does not 
compare it with other forms. It is scarcely the duty of zoologists 
to go to the descriptions of species to find characters of the highest 
systematic value, but it is nevertheless to be regretted that such 
good observations are buried in such a way. But though these 
good observations have failed to further the study of this order, I 
take this opportunity once more to refer to the ability of the late 
Swedish zoologist. He has observed and named all the. different 
organs of the antennae in Chelifer Javanus Thor. Even in the 
details, his investigations of such a complicated organ as lamina 
interior (his ""velum inferius”) is quite correct. He describes the 
flagellum and states, that the foremost hair is dentated along the 
front margin. The following quotation, ""Flagellum - detegere non 
potui (nisi haec setae flagellum representant)” can be regarded as a 
fine criticism of Stecker's '"Geruchsorgane”. - About "his designation 
of the different organs, which has in reality the priority, I refer 
to my paper on Indian Chelonethi (cf. 29, p. 12). H. J. Hansen gave 
some years. later (1884, 10, pp. 523—524), without having know- 
ledge of Thorell's observations, a full description of the antennae 
in Obisium C. K. and Chelifer Geof., his drawings were published 
a few months previously with a popular text in '"Zoologia Danica”. 
Even if his representation of the different organs of Chelifer Geof., 
does not go into the details as much as Thorell's did, his description 
of the antennae as a whole in the two genera is yet unsurpassed. 
He has clearly understood the manner, in which the development. 
of a single organ f. inst. lamina interior depends upon the structure 
of the whole antenna, and realized the systematic importance, found 
