164 
or spiked; the contents sometimes come out through one to three 
openings. The colon mostly contains a large black faecal mass, 
consisting of the named bodies without contents and clear strings, 
probably of vegetable origin. I have asked several botanists about 
the nature of these bodies, and they either regard them as pollen 
grains or as spores of fungi. 
9. Excretory Organs, Glands etc. 
The Eæcretory Tubes. These are placed along the dorsal part 
of the intestine from its front- to its hindmost part. In the males 
they are placed along the testes, but more laterally than those. 
In the females they are placed along the oviducts (pl. VI fig. 2, 3, 
4, 10, 11, 12, 176). I was not able to trace any communication 
between their hindmost part and the intestine behind; in front they 
are directed downwards and inwards, and in sections they are séen 
under the two short anterior coeca on each side of the oesophagus 
(fig. 2). Their walls are comparatively thin with few, rather large, 
oval nuclei. In their whole length they always contain smaller or 
larger bodies which are strongly coloured with hæmatoxylin (fig. 17 w) 
and show a more or less lamellar structure; these bodies are pro- 
bably concretions of urates and are of different size, the largest 
more oblong (0,068=m Jong and 0,044=m broad) the smallest round 
(0,012mm), Tf these tubes really communicate with the intestine, 
they are certainly homologous with the Malphigian tubes of other 
Årachnids, but I have never seen coneretions in the gut, which 
seems to speak against any communication. 
The Antennal Glands. Under the dorsal side of the cephalo- 
thorax and between the muscles of the antennae there is a glandular 
tube on each side, beginning in the front part of the abdomen and 
terminating near the base of the antennae (pl. VI fg.18&7 a): 
The tubes are amplest behind and in the middle; in front they 
become much more narrow. Their ends are somewhat swollen and 
directed upwards like a hook. Whether these tubes are closed & 
