[op 
nn 
“I 
LINCOLNSHIRE MITES. 
RHYNCHOLOPAIDA:.—( Concluded). 
(PLATE XXXIX.) 
Cor. GEORGE MOR-G:s: 
Ktrton-in-Lindsey. 
RitreriA. This genus, or as Professor Sig Thor calls it, sub- 
genus, was first differentiated from Rhyncholophus by Kramer 
in 1877. It will be seen to differ in many respects from Rhyn- 
cholophus. The legs are not nearly so long, nor is the penul- 
timate internode of the last pair of legs markedly longer than 
the others. The eyes, one on each side, consist of a single 
ocellus. The central part of the body in front projects in a 
snout-like manner, on which are a few hairs and two stigmatic 
openings, each provided with a rather fine and long tactile hair, 
well shown in Mr. Soar’s figures. There is no ball-like capi- 
tulum as in Rhyncholophus, the modification of the palpus is 
perhaps the most important difference here; instead of a 
prominent pear-shaped fifth joint, there is only a slightly pro- 
jecting hair pad, close to the base of the claw which terminates 
the fourth joint. The hairs or spines which cover the body are 
smooth, and appear to arise from the centre of a chitinous plate, 
they are also somewhat curved (see Plate XXXIX., fig. 4). 
This mite somewhat resembles Zrythraus nemorum, but is easily 
differentiated from that creature by the structure of the palpi and 
body hairs. It is of a fine red colour, and is not unlike Thor’s 
Ritteria norvegica, yet | am inclined to consider it to be a different 
species, and will therefore give it the provisional name of 
mantonensts, from its being found in the Parish of Manton, 
near to Kirton-in-Lindsey. I have also found several small 
specimens of a beautiful yellow colour belonging to this genus, 
whose specific names I am not able to give, each having the 
peculiar structure of the palpus. This structure was described 
and figured by Brady ‘On Rhyncholophus hispidus,’ in the 
Proceedings of the Zoological Society for 1877, pl. iv., and 
doubtless there are many more species of Rhyncholophus in 
England which require searching for, describing and recording. 
Many species, some of which, judging from the figures, appear 
to be very handsome creatures, have been described by foreign 
writers. One genus, which, so far as I know, has not yet 
been found in England, is remarkable for having a number of 
long hairs on the two last internodes of the hind legs, set in 
whorls and resembling very much a bottle-brush. The first 
1907 October 1 
