Studies on Tipulidae 11. 213 
3% In the structure of the thorax and the abdomen; the peculiar 
pits on the humeral part of the mesonotum and the impressed 
crosslines on the anterior half of the abdominal segments, are very 
distinet in the Franefort specimen of COtedonia; the pits are also 
mentioned by Philippi in the descriptions of Öt. pictipennis and 
bipunctata. Similar pits and lines occur in the subgenus FPoeei- 
lostola, which, as I have shown above, comes nearest to G’ynoplistia 
in its venation; they also occur in some other Limnophilina and 
I have drawn attention to them in my Monograph etc. IV, p. 200. 
(The thoraeie pits are also very distinet in the genus Pihypholophus.) 
I do not know their anatomical meaning, but I believe that Philippi 
is mistaken when he takes them for tracheal openings (in the de- 
. seription of Ct. bipunctata). I do not perceive such pits and lines 
in my specimen of Cerozodia;, in the Berlin specimen there is so- 
mething like the appearance of pits, but no abdominal lines. 
Whether the four species, described by Philippi as Ctedoniae 
really belong to the same genus, still requires confirmation (as I have 
shown above). 
Philippi also describes a species with rudimentary wings, which 
he supposes may be the female of his Ct. bipunctata. There is a 
similar female in Dr. v. Heyden’s collection, which agrees tolerably 
well with Philippi’s short description; but the antennae have 20 joints 
(and not 15); joints 3 and 4 have short, joints 5—14 longer stumps, 
which give the antenna a serrate or subpectinate appearance The 
pits on the humeral portion of the mesothorax are present. The 
ovipositor is as Philippi deseribes it. Ordinary females of Otedonia 
seem to have pectinate antennae, but with shorter branches than the 
male; I infer it from Philippi's data and find a positive statement 
in Jaennicke, who adds that in the female the two lower branches 
are wanting. 
The close affinity between Cerozodia and Ctedonia affords a 
new instance of the curious relationship between the Australian and 
New Zealand fauna and that of Chili; a relationship exemplified in 
abnormal forms, apparently survivals of past ages and of which we 
already have two remarkable instances in the genera Apiocera and 
Tanyderus. 
Polymera. 
Wied. Dipt. Exot., p. 40; 1821; Auss. Zw. I, p. 57, Tab. 6, b, 
fig. 3—4. 
O. Sacken, Monogr. etc. IV, p. 335; 1868; and ibid. Vol. III, 1873: 
Additions to Vol. IV. ; 
