132 (dr. a. c. oudemans). notes on acaei. 



Maxillar palps. Dorsal side (Fig. 50). Second (first free) joint 

 or trochanter very short, scarcely visible. Third joint or femur 

 with two hairs. Fourth joint or genu very short. Fifth joint or 

 tibia with Ihe usual claw provided with ^î/w^d inner basal tubercles. 

 Sixth joint or tarsus as usual, with the two usual combs. Ventral 

 side (Fig. 51) The first joint or coxa fused with that of the other 

 side to form the underside of the head and a tube around the 

 mandibles, with one hair. The second joint or trochanter very 

 short, scarcely visible. The third joint or femur with 3 hairs; the 

 fourth joint or genu short; the fifth joint or tibia with the claw; 

 and the sixth joint or tarsus with the usual claw-like hairs. 



Legs. Coxae 1, 3 and 4 (Fig. 51) with 2 hairs; coxae 2 with 

 one hair. Femur 1, 2, 3, 4 (Fig. 50) and genu 3 and 4 with a 

 feather-like hair Tarsus 1 like in the male, but proportionally 

 smaller, 



Habitat. Amoung meal-shop articles. 



Patria : Netherlands 



Found by me. 



Type in collection Oudemans. 



19. Labidostoma denticulatuni (Schrank). 



Fam. Lahidostomidae. 



In 1776 Schrank described an Acarus under the name of ^6'ü;n^Ä 

 corpore antice dentibus quatuor (Schrank, Beiträge zur Naturgeschichte, 

 p. 125, tab. VI, fig. 8). The creature is larger than the well known 

 Parasitus crassipes (L.i; it is brown; it has no eyes; the anterior 

 edge of the undivided body is quite straight, as if cut off trans- 

 versally, so that to the sides of this straight line the body has a 

 rectangular distinct angle; between the second and third legs the 

 body has on its sides a distinct protuberance. Hence the definition 

 € dentibus quatuor)^. The two mandibles, attached under the body 

 are projecting forward. Palps are absent oi' at least invisible when 

 the animal is viewed from the dorsal side. — According to Schrank 

 «the legs end in a two-pieced sole, between which is a minute 



