277 



3. Acari of Eiiglaml. 



In May 1883 the Zoological Laboratory of Utrecht received a 

 lot of Anodonta cygnea froin London. In many of them there 

 were several specimens of Unionicola ypsilophorus (Bonz). 



4. Acari of Grermany. 



Jhr. Dr. Ed. J. G. Everts, of the Hague, presented me with 

 some Disparipes bombi Michael, found on a Heterocerus fossor, 

 caught near Dresden, 1884. 



From the same able coleopterologist I received Oribata geni- 

 culata (L.), found by him among dryed leaves near Pyrmout, July, 

 1895. 



In 1896. I received from Mr. S. A. Poppe the following Acari, 

 caught in or near Vegesack : 



Laelaps agilis (L. C. Koch), cT; in a nest of Mus minutus; 

 28, 8, 1896 (see below). 



Liponyssus chelophorus Oudnis., nOT. sp., 2 nymphae; in a 

 nest of Mus minutus; 28, 8, 1896 (see below). 



Liponyssus muscili (C. L. Koch) ; 22 nymphae, 1 (ƒ, 5 9? on 

 Vespertilio serotinus; Sept., 1896 (see below). 



Argas vespertilionis (Latr.), larva, on Vespertilio serotinus, Sept. 

 1896. 



Glycyphagus ornatus Kram.; 1 nympha, 1 9» i n a nes t of 

 Mus minutus, 28, 8, 1896. 



Mr. J. D. Alfken, of Bremen, sent me an Athous haemorrhoi- 

 dalis F., with parasites, caught 8, 6, 1900, near Lesum. The 

 paratites were larvae of Erythraeus quisquiliarum (Herm.). 



He also caught a Bombus muscorum L. in the Isle of Wangeroog, 

 on 3, 6, 1900, on which crawled 9 Hypoaspis fuscicolens nov. sp. 

 and he picked up the following Acari in the city of Bremen : 



Parasitus fucorum (de Geer), 47 ex., on Necrophorus vespillo L., 

 11, 7, 1900. 



Macrocheles marginatus (Herm.), 4 ex., on Necrophorus vespillo L., 

 11, 7, 1900. 



