ACARINA FROM THE JUAN FERNANDEZ ISLANDS 575 



sent day it is almost certain that he would have changed his view in this 

 respect. 



It was therefore left to BerlesE to create the new genus Eutegceus, which 

 he did in this instance, as in many others, by only indicating the type species. 

 It is, however, easy to supply a diagnosis by consulting the careful description 

 and drawings of MiCHAEL .{1908, p. .136 — 137, figs. 1—3, pi. 17) and compar- 

 ing it with the new species found in Juan Fernandez. 



Diagnosis: Pteromorphae very narrow, transparent, projecting for- 

 wards from the anterior margin of the hysterqsoma near the lateral 

 corners. Lamellae very large and almost horizontal. Claws mono- 

 dactylous, large. 



6. Eutegaeus similis n. sp. — Figs. 42 — 44. 



It is very interesting to find on Juan Fernandez a representative of a 

 genus hitherto only recorded from New Zealand. The present species is, in- 

 deed, very closely related to E. Bostocki and its existence amply justifies the 

 creation of a distinct genus by Berlese. 



Length looo [i. With 735 [i. 



Colour dark chestnut-brown. The texture dull and rough even after 

 the secretion has been taken away by boiling lactic acid. 



Propodosoma (fig. 42) with very large, almost horizontal lamellse which 

 are very thin, hyalin and have a netlike sculpture; they project forwards a 

 little beyond the tip of the rostrum and are broadly rounded at the top, with- 

 out any incision; the inner edge is even and, as far as I have been able to 

 see, not fused with the translamella. The translamella is very thin and trans- 

 parent and horizontal, extending as far as to the tip of the rostrum with straight, 

 even anterior edge. 



The lamellar hairs are inserted at the top of the lamellae, fairly large and 

 curved very sharply inwards like hooks. Rostral hairs small, curved slightly 

 inwards and marginal. Interlamellar hairs are placed on a level with the an- 

 terior margin of the pseudostigmata and are long, straight and almost perpen- 

 dicular. 



Pseudostigmatic organs (fig. 43) of a very remarkable shape, not 

 often met with in the Oribatei. The pseudostigmata are, as a rule, shaped 

 more or less like funnels, which for the greater part are so deeply embedded 

 in the propodosoma that only the edges of the funnel protrude above the sur- 

 face. In Eutegceus similis and presumably also in E. Bostocki they are shaped 

 like ear-trumpets and raised above the level of the surrounding cuticle, only 

 the inner third being concealed beneath it. They are curved forwards and the 

 walls are richly provided with transversal septa, which on lateral view look like 

 so many spines; the inner part is directed obliquely inwards and forwards. 

 The pseudostigmatic organs have slender peduncles and oval heads, shorter 

 and more blunt than in E. Bostocki. 



Hysterosoma (fig. 42) of exactly the same shape as in E. Bostocki 

 but without the two small, chitinous, conical projections in the centre of the hind 



