270 A. C. OUDEMANS, NOTES ON ACARI. 
the branches of the Y a distinct crescent-shaped portion is 
hard and brown, consequently a shield. Epimera II as long 
as epimera I. Epimera HI not only marginal (like in nympha 
and male) but also springing rectangularly inward for a small 
portion. Epimera IV short, though longer than the trochan- 
teres IV. Shields absent, except the throat-shield already 
mentioned. Epigynium small, badly chitinized, slightly 
curved. Internal genital apparatus of the usual type, though 
rather long. Anus terminal. Hairs. Inside of the middle 
of epimera II a pair of short and thin hairs. Before the proximal 
ends of epimera IV a pair of ditto. Between the proximal 
ends of epimera IV and the internal genital apparatus a pair 
of ditto. A pair of ditto flanks the epigynium. Finally on 
the venter a pair of ditto. The long lateral hair has become 
dorsal (Fig. 50); the accompanying one, is shorter, and has 
a quite lateral if not rather dorsal position. (Fig. 51). 
Mandibles apparently normal. 
Maxillae apparently normal. 
Legs I and II like in the nympha and male. Legs III and 
IV lke in the nympha. 
Habitat: Totanus flavipes. 
Patria: Probably the geographical distribution is the same 
as that of the bird-host. 
Found by Dr. E. L. Trouessart on a skin of Tot. flav. 
original from Guyana. 
Types in collection Oudemans. 
Arnhem, 5 October 1904. 
POSTSCRIPT. 
Berlese lately considers Parasitus bomborum Oudms. to be 
the Acarus fucorum of de Geer. 
Arnhem, 13 November 1906. 
