624 IV AR TRAGARDH 



EUGAMASUS Berl. 

 Eugamasus magnus (Kram) var. cavernicola nov. var. 



(Fig, 3-18) 



Département des Basses-Pyrénées {France). — Grotte 

 d'Istaiirdy, commune d'Ahusquy (Aussurucq), canton de 

 Mauléon, Winter 1905 ; N^ 130, 1 o% 1 9. 



Distribution of tlie main form : Italy, Germany, HoUand. 



The présent species lias so many characteristics in com- 

 mon with E. magnus (Kram) that the différences which are 

 noticeable between them do not seem to imply a spécifie diffé- 

 rence. I therefore refer my species as a variety of E. magnus 

 (Kram.). In the foUowing description, chiefly the différences 

 will be pointed out, besides which a few additions, which very 

 Hkely apply also to the main form, will be made. 



Mâle. 



The epistoma (fig. 3) resembles more that of the Italian 

 than that of the Dutch spécimens (compare Berlese 1906, 

 pi. 14, fig. 9 et 10), the médian cusp being more than twice 

 as long as the latéral ones (2, 5 : 1). 



Mandibles (fig. 4) essentially of the shape of the main 

 form, but there are some différences in détails and proportions. 

 Thus, in var. cavernicola the middle tooth of the lower jaw is 

 placed exactly between the distal and the médian third of the 

 length of the jaw, whereas in the typical form it is placed in the 

 distal quarter. Calcarmandibuli is fused anteriorly with 

 the jaw in front of the tooth ; in the main form at the back 

 of the tooth. Moreover, in the former it is bent downwards 

 and upwards in an even curve near the base, while in the latter 

 it is almost straight. 



The upper jaw is comparatively shorter in the var., and the 

 terminal tooth is much smaller than the subterminal one, 



