(db. a. c. oudemans). list or dtttch acari. 193 



(this is the female, the male is called by Koch some few pages 

 further on Aniblyomma decoratum Koch). The male of this species 

 shows on its back the figure of a tortoise , and irisâtes like mother- 

 of-pearl. Koch's specimens were from Manilla and from the Phihppine 

 Islands. 



2. Most certainly I can assert that Koch has figured his Am- 

 hlyomma venustum , annulipes , helvolum and decoratum from dryed 

 specimens. The specimens of the species of Amblyomma which I 

 received from Mr. A. Greshoff of Brazzaville were preserved in 

 spirits; they were very irisating. The specimens of Amhlyomma 

 which I found on Triglypliodon dend/rophilum were preserved in 

 spirits; they were splendidly irisating. By the courtesy of Dr. Everts , 

 teacher at the High City School of The Hague, I was in the 

 occasion to examine several specimens of the same species , handed 

 to me by mr. Greshoff of Congo ; they were preserved dry ; their 

 colour had now become nearly pure black and they had now lost 

 their irisating property; in this condition they much resembled 

 Koch's Amhlyomma venustum. Koch calls the back of Amhlyomma 

 venustum « not shining » , those of Amhlyomma annulipes and A. 

 helvolum « shining » and of that of Amhlyomma decoratum he says 

 nothing, whilst if he had examined specimens preserved in spirits 

 he certainly would have mentioned the most beautiful irisating 

 of these species. 



3. Dr. Everts has also transmitted me a species of Uhipistoma 

 from Transvaal, and Dr. Snelleman a species of RJiipistoma from 

 Sumatra (Sumatra-Expedition of 1877) found on Felis tigris. 



4. Three species of Hyalomma were sent to me by Dr. Van 

 Hasselt of which two of unknown locality , while the third is from 

 Paramaribo; they will be described and figured by me in this journal. 



5. Two kinds of Bhipicephalus found on Bos hubalus in Sumatra 

 (Sumatra-Expedition of 1877) were transmitted to me by Dr. 

 Snelleman. Dr. Everts presented to me several specimens of ^i^i/?ice- 

 plialus capensis KocH from Transvaal, males and females. The 

 figures of this species in Koch's Uebersicht des Arachniden-Systems 

 are tolerably well delineated. 



