A. C. OUDEMANS. ACARI. 137 



or telotarsus), above which a membranaceous upper jaw or basitarsus (Fig. 91); the claw 

 dorsally and distally provided with low and blunt grapple-hook. 



Maxillae (Fig. 89, 91). Coxae fused together without àny trace of démarcation, anter- 

 iorly bilobous and hère provided with a submedian pair of minute hairs. Trochanter and 

 fémur apparent!}' not articulate, though with distinct démarcation. Trochanter small, twice 

 wider than long; fémur dorsally much longer than ventrally, therefore dorsally gibbous and 

 hère provided with a short hair. Genu dorsally as long as fémur and hère provided with a 

 long hair. Tibia short, ending in enormous claw ; tarsus short, almost globular, provided with 

 two short and two very long sharply pointed bristles. 



Legs I and II slightly thicker than legs III; legs I and II of equal length, almost as 

 long as the three coxal plates together; legs III longer, surpassing this length with the tarsus 

 and one third of the tibia. In gênerai the legs bear only a very few hairs. Legs T. trochanter 

 distally and internally with a pin; fémur dorsally and distally with a hair; genu ditto, ven- 

 trally with a thin hair twice longer than its own length; tibia dorsally with two short hairs, 

 distally with two minute ones ; tarsus bare. Legs II: fémur dorsally and distally with a short 

 thick (olfactoric?) hair and a thin short hair; genu dorsally distally with two short fine hairs 

 and a short thick one (olfactoric?), ventrally with a thin hair twice longer than its own length ; 

 tibia dorsally proximally with a short thin hair; in the middle with a thin hair, longer than 

 its own length ; distally with a short thick hair (olfactoric ?) ; tarsus bare. Legs III : trochanter 

 partly lying under a scale of the coxal plate with round chitinous condylus; ventrally with 

 a short fine hair; fémur dorsally and distally with a fine hair; ventrally and distally with a 

 fine hair and a pin or thorn ; genu like the fémur; tibia dorsally in the middle with a short 

 fine hair; distally with a strong thorn and a very thin hair, longer than fémur, genu and 

 tibia together; externally with short thin hair in the middle and a little thorn distally; ven- 

 trally with a thorn in the middle, then a thin hair, then distally with a thin hair and a thorn ; 

 tarsus dorsally with a short and thin hair in the middle, ventrally with a short thorn in the 

 middle. Paratarsi (Figg. 92 — 93) with two rather strong claws and a claw-like empodium, the 

 end of which is wider; moreover the paratarsus is flanked by a tarsal transparent thick hair 

 (olfactoric?), a little pin and an extremely fine hair (tactil?). 



Habitat on a gnat : Mansonia ? unicolor Theob. 



Acarus putrescentiae Schrank. 



1776. Acarus ovatus Iiy alunis setosus, pedibus subaequalibus, Schrank , Beitràge zur 

 Xaturgeschichte, p. 34, t. 1, fig. 28, 29. 



1781. Acarus putrescentiae, SCHRANK, Enumeratio Insectorum Austriae, n°. 1079. 

 1790. Acarus putrescentiae, G.MÉLIN, Linnaei Systema Naturae Ed. 13a, n°. 75. 

 1792. Acarus putrescentiae, OLIVIER, Encyclopédie méthodique, vol. 7, p. 697. 



1802. Acarus putrescentiae, TURTON, System of Nature, p. 708. 



1803. Acarus putrescentiae, SCHRANK, Fauna Boica, vol. 3, p. 203, n°. 265 1. 

 Of this mite SCHRANK, 1776, verbally says: 



.In der Gartenerde, besonders in Blumentôpfen findet man eine Milbenart, die ein 

 sehr zahlreiches Volk ausmachet, besonders, wenn ein Blatt oder sonst etwas ùber oder miter 

 Nova Glinea. Y. Zoologie. iS 



