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 0. 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 0. paci- 

 ficus (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 fronl the great central shield which in the posterior Va 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 ^/s 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 alm.ost the same shape as in 0. pacificus. 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 genitaJ 

 aperture, with two pairs of hairs as in 0. pacificus. 



Legs all dark-brown and very slender. Trochanter I and II very small, 



