73 
1921-22.] Myriapods from Mesopotamia and N.W. Persia. 
is divided into a moder- 
ately slender stalk and 
a much swollen, pear- 
shaped end (d.); it is nor- 
mally directed outwards 
at a right angle with 
and perpendicularly to the 
main axis of the first 
diverticulum. 
Three males and four 
females from : ‘‘ Amara, 
under clods, 17 ii. 1918.” 
Had Verhoeff’s system 
been strictly followed, this 
new species would have 
fallen under Micropachy- 
iulus, owing to the absence 
of a mandibular process. 
But it agrees exactly 
with none of the sub- 
genera proposed by the 
said author. On the other 
hand it does not seem 
justifiable, as was pointed 
out by Attems in 1902, to 
extend the p^eneric name 
Micropachyiulus to any 
other species but the type, 
i.e. M. paucioculatus, Yerh., 
as this is the only one the 
gonapods of which are 
undivided ; all the other 
forms have a distinct 
mesomerite, as seen in 
M. Evansi. A new generic 
name has therefore to be 
adopted for the bulk of 
the other Micropachyiuli, 
and Berlese’s Mesoiulus 
had to be chosen as being the oldest known (1886). 
Fig. 3 8 . — Mesoiulus Evansi, ii. sp. Second pair of legs (P2) 
of female and vulvar invaginations (t. ) in their nor- 
mal position, anterior view. s. , Sternite ; t., tracheal 
stalks; h. , hinges of the vulvse ; d., diverticulum of 
same. 
Fig, 19 . — Mesoiulus Evansi, n. sp. Right vulva seen from 
above, o., Operculum ; m., mound ; r., ridge ; a., 
apodema ; d., diverticulum. 
