TERRKSrUIAL ACARl OF THE TYNE PROVINCE 53 



on the marginal. All the setae are of the same 

 length (about equal to the breadth of the marginal 

 scutum), stout, straight, rodlike. 



The under side is irregularly punctured, less densely 

 tlian the dorsum (except the genital valve of the 

 female, where the punctures are more numerous) _ 

 The outline of the epigyne is rather narrow oval, 

 truncate behind, rounded in front where the rim is 

 produced forward into a long subulate point which 

 just reaches the sternal margin. The epigyne is 

 small for the size of the species, lying almost 

 wholly between the coxae of the third pair of legs. 



Abundant in manure. I have specimens from West 

 Australia. Nymphs were found swarming on 

 asters at Chopwell. The protonymph travels on 

 beetles but is not pedunculate. 



DINYCHUS, Kramer, 1886. 

 Type : perforatus.^ Kr. (= inermis^ Koch). 



1. Median dorsal scutum without thick posterior setse... inermis. 

 2 or 4 stout setae near posterior margin of median 



scutum ... ... ... ... ... ... 2 



2. Posterior setae 2 ... ... ... ... ... 3 



» 4 4 



3. Marginal scutum continuous ... ... ... .. vartismithii. 



,, interrupted in front... ... ... bisetis. 



4. Posterior setse less than their own length apart ... tetraphylltis. 



,, much farther apart ... ... ... fossor. 



41. Dlnychus inermis, K. 66, 67. 



Fairly plentiful in manure ; also under loose boards, 

 &c. 



42. Dinychus vartismitltii, sp. no v. 



A very well-marked species. 



Narrow oval, with elongate pseudo-capitulum, which 

 runs to a rounded point. It is formed by an 

 extension of the marginal scutum, acutely 



