132 A. C. OUDEMANS. ACARI. 



serrate hairs (resembling those of the dorsum, fig. 61). Further the whole venter is provided 

 with hairs of the same kind, arranged in about four or five irregular transverse rows -of about 

 ten hairs each. 



Epistome pentangular, provided with a fine médian line (Fig. 59). 



Mandibles (Fig. 64) dorsally and internally slightly serrate. 



Maxillae. Coxae (Fig. 60) with coxal hair close to the trochanterofemur, of the same 

 kind as the other coxal hairs. Hypostome ventrally smooth, distally scarcely bilobate, dorsally 

 (Fig. 59) opened, gutter-shaped and basally provided with long smooth hair (see also fig. 65). 

 No trace of any epipharynx, nor of any hypopharynx. Trochanterofemur dorsally and extern- 

 ally (Figg. 59 and 65) swollen, with proximal pectinate hair. Genu short with dorsal pectinate 

 hair. Tibiotarsus dorsally with one smooth hair and one external pectinate hair, terminally 

 with strong claw which externally and ventrally shows a smaller accessory claw almost in 

 the middle. Telotarsus short, thick, club-shaped (Fig. 66), ventrally with three pectinate hairs 

 and two olfactoric hairs, dorsally with one pectinate hair and one olfactoric hair. 



Legs rather thick; their joints rather short, increasing in length distalward. Also the 

 number of hairs with which they are ornated increases distalward, from one or two to about 

 ten or twelve on each joint. The greater part of thèse hairs are pectinate. The following not 

 pectinate hairs may be mentioned : Legs I : genu with short smooth hair; tibia with 3 short 

 smooth hairs ; tarsus with a thick, short, rod-like olfactoric hair and a long smooth tactile hair, 

 accompanied by a very short smooth olfactoric hair. Legs II: genu with one short smooth 

 hair; tibia with one short smooth hair; tarsus with one short thick olfactoric hair. Legs III: 

 genu with one short smooth hair; tibia with one short smooth hair. Ail the femora are 

 distinctly divided in a basifemur and a telofemur. Paratarsi minute, almost invisible. Empodium 

 claw-like, thin, proximally and distally nodded. Claws rather strong, curve, thicker than claw- 

 like empodium. 



Habitat: the forests, in which they wait for men ; probably also for other Mammalia, 

 which, however, is not yet proved. 



Thrombidium Wichmanni Oudms. 

 (Plate IV, fig. 67—78). 



1905 Mardi 1. Thrombidium Wichmanni nov. sp. OUDEMANS in Entomologische Be- 

 richten, n°. 22, p. 217. 



Patria: Celebes and New Guinea. 



Fourni by Professors Sarasin in North-Celebes and by Messrs. de Beaufort and Lorentz in New 

 Guinea (Tawarin, 20, VI, 1903; Jamûr, 6, VIII, 1903). 



Larva (Fig. 6j — 78). Length from 240 — 520 (/.. Colour most probably scarlet ; in spirits 

 white, or pale, or yellowish, or grey, or scarcely with scarlet hue. Shape of newly hatched 

 fasting larva (Fig. 67) heptangular, having a trapezoidal anterior portion and an almost square 

 abdominal one; the anterior side convex ; the oblique sides concave; shoulders rounded; 

 posterior corners of abdomen rounded and sack-shaped. Shape of larva which has already 

 fed a little (Fig. 68) wider, with small anterior shoulders between legs I and II, very prominent 



