400 Deutsch. Ent. Zeitschr. 1910. 



the incision of the posterior dorsals hield. — Hairs. A pair of 

 small extremely thin hairs outside of and close to the posterior 

 end of epimera I ; a second pair inside of and close to the trans- 

 verse chitinous bars of the genital aperture ; a third pair outside 

 of and close to about the middle of the epimera III ; a fourth 

 pair free in the middle of the venter (if you prolong the so called 

 epimera V you will meet them) ; a fifth pair close to and outward 

 of the posterior end of the anal split ; and finally a sixth pair 

 near the edge of the abdomen, where this becomes broader. 

 Of the head and mouth-parts I can say nothing. 



Legs normal. The anterior legs have their well known 

 5 joints : a small trochanter, a pedunculate femur, a short genu, 

 a tibia which is short in legs I and twice longer in legs II, and 

 a conical tarsus ; but — and hereupon I will purposely draw 

 your attention , the posterior, legs have only 4 joints. If we 

 now ask which Joint is wanting, and how has it disappeared, by 

 fusion or by vanishing, we must compare our legs with those of 

 allied species. And then we come to the conclusion 

 that the femur has really vanished, so that the 

 remaining joints are the trochanter , genu , tibia and tarsus. 

 (Compare a leg with that of Tr. rosterii [Berlese] , fig. 22.) — 

 Of legs III and lY the joints of each leg are rather equal 

 in length. 



R e m a r k s. This species is closely allied to Tr. rosterii 

 (Berlese) and Tr. minutipes (Berlese). It differs , however , from 

 Tr. rosterii (Berlese) by having more pedunculated femurs I and II ; 

 by having the Shoulder hairs not planted in the anterior dorsal 

 shield , but in a lateral incision of it ; by having a lateral in- 

 cision in the posterior dorsal shield close to the place of Im- 

 plantation of legs III ; and by having longer hairs on the abdominal 

 or tail pieces. — It differs from Tr. minutipes (Berlese) by having 

 a pair of smaller hairs between the Shoulder hairs ; by having a 

 dorsal hair in the anterior end of the posterior lateral shield ; 

 and by having longer hairs on the abdominal or tail pieces. 



H a b i t a t unknown. The mite was included in a micro- 

 scopical preparation containing also Cheletes vorax Ouderaans and 

 Cheletes rapa.v Oudemans , both found by Dr. E. L. Trouessart on 

 the prepared skin of a bat original from the Isles of Mariannes. 

 Possibly therefore it is original from any bird from the same 

 Archipelago , and may have been imported in France on a pre- 

 pared skin of a bird packed together with that of a bat. But 

 it is also possible that it accidentally was included in the micro- 

 scopical slide, although original from France. 



