19 16. Brade and Birks— /m/i Chilopods. ■ 123 
another ; the number of antennal segments varies in 
L. microps, according to Meinert, from 29 to 40 ; in small 
species with short antennae such variability is unusual. 
In the armature of the inferior surface of the anal limbs the 
'formula varies, according to the original description, from 
o, I, o, o, o to o, I, 3, 2, o, whereas in small forms with 
incrassate anal appendages the armature is generally poor. 
The material collected by Dr. Brolemann exhibited the 
incrassate nature and low armature of the anal limbs, and 
so he concluded that the formula o, i, 3, 2, o applied to 
another species and established his Lithohius Duhoscqui 
on the strength of his own material. At the same time 
he pointed out the resemblance between the young of 
Lithohius crassipesi L. Koch and his own new species. He 
distinguished the former from L. Duhoscqui by the antennal 
segments, which are generally smaller in number in L. 
crassipes ; by the single claw at the end of the anal limbs 
in that species ; and by its armature of these same limbs 
(o, I, 3, 2, 0, below). Dr. Brolemann points out that these 
differences are not always very clear and that he was 
mistaken himself in his record of Meinert 's species in his 
list of La Ferte-Milon material, where the three specimens 
recorded were really referable to L. crassipes. The Forest 
of Andaine specimens were L. Duhoscqui. 
When the Dubhn Museum specimen (181) was named 
L. microps a parallel case was established because this 
animal turned out to be L. Duhoscqui. 
In England Dr. Brolemann's species has been recorded 
from several localities. In 1913 Mr. R. S. Bagnall recorded 
it ^ from the Durham banks of the Derwent near Blanch- 
land, and also from the neighbourhoods of Oxford and 
Manchester. Dr. A. Randell Jackson recorded it in his 
Chester list ^ and said that Mr. Pack-Beresford also sent 
it to him from Bagenalstown, County Carlow. 
It would not a])pear that the true niicyops has occurred 
in Britain although specimens with larger numbers of 
antennal segments than those given in Dr. Brolemann's 
original description may be expected. Dr. Brolemann 
(^) Zoologist, Aug., 1913. 
(^) Lanes. Naturalist, March, 1914. 
