102 Acarology 



group. Additional data are required before this family can be included 

 with certainty in any group. 



Reference: 



Fonseca, F. da. 1940. Notas de Acareologia. XXIV. Dasyponyssus neivai 

 gen. n., sp. n., acariano parasita de Eiiphractus sexcinctiis (L.) 

 Acari, Dasyponyssidae fam. n.). Rev. Ent. Rio de Janeiro 11:104- 

 119, 5 figs. 



DIARTHROPHALLIN A TRAGARDH, 1946 



The penis is biarticulated, directed posteriorly, and situated in a 

 groove between coxae in. Prestemal setae are present. The epigynial 

 plate is enclosed in the fused sternal and ventral plates but is not sepa- 

 rated from the ventral plate by a suture. Only one family is known. 



Diarthrophallidae Tragardh, 1946 



Figures 74, 75 



Diagnosis: Diarthrophallids 

 are characterized in addition 

 to the fundamental structures 

 mentioned in the subordinal 

 diagnosis by many other fea- 

 tures. Leg I is modified as a 

 tactile organ and lacks a car- 

 oncle and claws. Legs ii-iv 

 have a well-developed ambul- 

 acral apparatus. The setae on 

 the dorsal side are long and 

 stiff and in the living mite pro- 

 ject dorsally. The dorsal plate 

 is entire. 



Figure 74 Diarthrophallus quer- 

 ciis (Pearse and Wharton), 1936. 

 Ventral view of nymph. (After 

 Tragardh 1946) 



