586 IVAR TRAGARDH 
inserted; they are slightly longer and much more pointed than the interlamellar 
hairs and curved towards the median line. 
Rostral hairs only half as long as the lamellar hairs but of the same 
shape, inserted far backwards marginally, only a little in front of the lamellar 
hairs. 
Pseudostigmata (fig. 61) almost circular with small orifice and slightly 
raised; the funnel has radial septa and its innermost part, where the peduncle 
is inserted, turns forwards and is visible underneath the cuticle as a small, 
rounded projection. The pseudostigmatic organs are rather short, the peduncle 
is bent backwards, then slightly outwards and forwards, then obliquely upwards, 
outwards and backwards. The head is fusiform and slightly shorter than the 
peduncle. 
The posterior part of the propodosoma has a rather complicated structure, 
which somewhat resembles that of O. pacificus and of O. crinitus (BERLESE 
1904; fig: 47, tab. 17). 
The posterolateral angles are earshaped, with thick raised edge, beginning 
on the exterior side of the pseudostigmata and running obliquely backwards 
and inwards, forming a low, rounded projection and then curving forwards. 
The central part of the posterior margin forms a low, rounded projection 
and between this and the ear-shaped structures there is a pair of rounded pro- 
jections, which cover the base of the central one. 
The sides of the propodosoma have the same. scaly texture as in O. pacz- 
jicus (comp. fig. 57). 
Hysterosoma (fig. 59) elongated, well rounded posteriorly, but with the 
sides in the anterior half gradually narrowing towards the anterior margin which 
is transversally cut off and only one third of the greatest width. The anterior 
margin has two pairs of tooth-shaped projections, the lateral ones of which are 
contiguous with the posterolateral angles of the propodosoma, while the median 
ones fit in between these and the posterior lobes. 
The hysterosoma is covered by a shield, very slightly arched, which has 
a distinct brown-coloured margin; in the two anterior thirds there runs a band 
of very light-coloured and apparently soft cuticle along this margin and divides 
it from the great central shield which in the posterior */s is coalesced with the 
marginal shield, and anteriorly vanishes near the level of the anterior pairs of 
hairs. The hairs are conspicuous through their great length, measuring gener- 
ally about */5 of the length at the hysterosoma. They are arranged in two 
longitudinal rows of 5 each near the median line; on a level with the 4th hair 
there is one lateral hair, and on a level with the 5th one another and between 
them further laterally there is another hair. There are 4 pairs of marginal 
hairs in the posterior third, the anterior one of which is only half as long as 
the others. 
Ventral side of almost the same shape as in O. facificus. Genital aper- 
ture rectangular, very small; plates with 3 pairs of hairs, one anteriorly near 
the median line, the two others one behind the other in the posterior half. 
Anal aperture large, rectangular, twice a slong and twice as wide as the genital 
aperture, with two pairs of hairs as in O. pacificus. 
Legs all dark-brown and very slender. Trochanter I and II very small, 
