46 A. e. OUDEMANS, NOTES ON ACARI. 



»Sijriììgohieae. — Semblables aux PteroUcheae, mais en diffé- 

 rant par les caractères suivants: sillon thoraco -abdominal 

 généralement renforcé au moyen d'une articulation en Enarth^ose 

 (c'est-à-dire que la partie antérieure de l'abdomen est engainée 

 dans la partie postérieure du thorax). Deux formes de 

 mâles (hétéromorphes et homéomorphes) ; les mâles hétéro- 

 morplies pourvus de chélicères très fortes (chélicères 

 t y r o g 1 y p h i n e s) et de ventouses copulatrices ; les mâles 

 homéomorphes à chélicères normales, souvent dépourvus de 

 ventouses copulatrices. Deux formes de femelles, l'une normale, 

 l'autre p a r t h é n o g é n é t i q u e , celle-ci dépourvue de 

 plaque notogastrique». 



We have already observed that our Syrimjobia chelopus, may 

 it be related to the PteroUcheae, differs from it in having 

 thick legs IV The »articulation en enarthrose» is also obser- 

 ved in PteroUcheae. Moreover the »articulation en enarthrose» 

 does not exist at all! If we view the creatures dorsally it 

 seems to us as if the anterior part is shoven in the posterior 

 part, but if we examine the ventral side, the contrary is the 

 case. In fact the anterior half is united with the posterior one 

 in such a way that the creatures are capable to nod their 

 body a little ventralward. Further there is only one form of 

 male (the so-called other form belongs to our Plutarchusia 

 chelopus), and there is only one form of female (the other 

 form belongs to our Plutarchusia chelopus and has less chiti- 

 nized, though distinct dorsal shields). 



Beri-ese, 1897 (I.e. see hereabove p. 44) excluding the 

 Epidermopteae, divides the Analgidae as follows : 



»I. Foeminae adultae in abdomine postico setulis tantum 

 auctae, apophysibus vel corniculis destitutae. 



»A. In caule eodem plumarum insiti et absconditi 

 Syringobiina. 



»B. Super plumas degentes. 



»a. Mares pedibus suis parum a foeuimis diversi PteroUchina. 



