A. C. OUDEMANS. ACARI. 



135 



Patria: New Guinea. 



Fourni in Humboldt Bay, 17, V, 1903 by Messrs. de Beaufort and Lorentz. (1 Ex.). 



Larva (Fig. 79 — 87). Length iooo.v. measured on one single spécimen of which the 

 rostrum is absent. Colour most probably scarlet; hairs dark brown. Shape of the single spéc- 

 imen under examination oval, top fonvard, scarcely a little constricted at the level of the 

 eyes. Texture: the shield is finely porate, except its chitinous ridges which are smooth ; the 

 coxae are porate too. The remaining body is finely wrinkled ; even the legs are finely trans- 

 versally wrinkled; the tarsi are wrinkled less finely. 



Dorsal side (Fig. 79). Shield (Fig. 84) more or less triangular, top backward ; anterior 

 side very convex, anterior angles very rounded ; posterior oblique sides slightly concave ; 

 posterior angle rounded and medianly excavate or incised. On the shield the future crista is 

 distinctly formed by chitinous ridges, with the areolae ; the anterior areola is laterally open ; 

 the branches of the posterior half of the anterior areola are lengthened so that they reach 

 the anterior rounded angles of the shield just before the anterior latéral club-shaped hairs. 

 Also the anterior portion of the anterior areola is somewhat lengthened sidewardly , but 

 vanishes; to the sides of the posterior areola two anteriorly diverging chitinous rod-like rid- 

 ges: the basai rings of the two latéral hairs of the shield are united by a chitinous ridge 

 too. Each areola provided with two small round, low cup-shaped pseudostigmata. The pseudo- 

 stigmatic organs are long, very thin, setiform; their distal half is a little hairy or feathered. 

 Eyes: at a level a little before legs II two submarginal single eyes, with semiglobular cornea 

 (Figg. 79, 85, 86) and globular crystal body, which is connectée! with the cornea by a light 

 refracting peduncle. Hairs. On the latéral margins of the shield on both sides two thick 

 brown haired hairs, which slowly become thicker distalward, thus being somewhat club-shaped 

 (Fig. 81). The dorsum moreover is thinly-scattered with similar hairs ; there are about 30 

 pairs of them placed not quite symmetrically, and scarcely in transverse rows. The small 

 hairs on the big ones stand in longitudinal rows, so my figure 81 is not well done. 



Ventral side (Fig. So). Coxal sliields more or less triangular ; coxae I and II with rather 

 sharp internai angle; coxae III with rounded internai (proximal) end. Hairs: the hairs are 

 of the same kind as the dorsal ones; they are placed much more symmetrically as follows: 

 between coxae I one pair; between coxae II one pair; between coxae III one pair; a little 

 before this pair another pair; further on the belly 10 pairs. On each coxa a hair. Anus 

 small, almost in the centre of the belly. 



Epistome, tnandibles and maxillae. As the rostrum is absent I cannot say anything of 

 thèse parts. 



Legs. Ail the legs are slender; trochanter small; fémur divided in a basifemur and a 

 telofemur. From the basifemur to the tibia the joints increase in length; their hairs, though 

 small in number, increase in number too ; thèse hairs are sharply pointed and again haired 

 Fig. 82J. Moreover there are smaller smooth hairs (Fig. 83) on the following joints: on genu 

 I one in the middle; on tibia I two in the distal half; on tarsus I one in the middle; on 

 tibia II one proximally; finally on tibia III again one proximally. Most probably thèse smooth 

 hairs hâve an olfactoric signification. The tarsi I are scarcely swollen, more or less spool- 

 shaped. The distal ends of the tarsi bear four différent hairs (see fig. 87 which represents 

 the right tarsus I seen from above) : one sharply pointed and haired hair, one internai thick 



