Oudemans, Notes on Äcari. 397 



The genual part shows dorsally (fig. 17) a small backward 

 curved flat process like a human nail. The tibia has the usual 

 ventral triangulär enlargement. The tarsus ends in a caruncle 

 of usual type and dimensions. Legs II : the femoral part of 

 the femorigenu with the usual thumb ventrally ; the tibia with 

 the usual triangulär enlargement ; the caruncle of the tarsus is 

 minute. Legs III and IV enormously developed (for a female !) ; 

 their tibiae with internal long flat stylus ; their tarsi falciform, 

 with minute caruncle. 



H a b i t a t : Totanus flavipes {Gamhetta ß.y 



P a t r i a : Probably it has the same geographical distribution 

 as the host. 



F u n d by Dr. E. L. Trouessart. 



Type in collection Trouessart. 



4. Trouessartia trouessarti Oudms. (fig. 20 — 21.) 

 ^ 1904, July 1. Trouessartia trouessarti Oudms. in Ent. Ber., v. 1. 

 p. 163. 



Female. L e n g t h 544 (.i. — C 1 u r brick-coloured. — 

 S h a p e that of Trouessartia niinutipes (Berlese). — Textur e polished 

 on the chitinous, finely wrinkled in the weak parts. 



Dorsal side (fig. 20) protected by two dorsal shields 

 and partly by the side-shields. Anterior shield with two 

 wings, protecting the coxal parts of the legs I, and with a median 

 rounded lobe overlapping the proximal dorsal part of the head 

 (the neck). At the level of Implantation of legs II the shield 

 has a deep lateral rounded incision to receive the implantation 

 ring of the shoulderhairs, which are as long as the width of the 

 shield. Between these two excavations there is a second pair 

 of hairs which are as long as the width of the capitulum. The 

 whole shield is finely punctate , but polished. — Posterior 

 shield; anterior edge wavy, with 3 slight excavations ; at the 

 level of the implantation of legs III there is a deep lateral 

 rounded incision , the edges of which are well chitinized and 

 dark. Anteriorly to the first pair of hairs of the tail pieces 

 the shield (and also the body) is suddenly a little enlarged. 

 Above this enlargement are planted the first pair of abdominal 

 hairs , the proximal half of which is long - fusiform , the distal 

 half setiform ; the length of this hair is as long as that of the 

 abdomen (from the transverse line between the two shields tili 

 the hyaline membrane between the two tail-pieces). Between these 

 long hairs there is a minute pair Banking the deep and narrow 

 incision of the shield. At the end of the long and sharp tail- 



