1891.] ASSOCIATION OF GAMASIDS WITH ANTS. 647 



organ is often drawn as the lingua and occasionally, I fear, as the 

 eltome, whence great confusion arises ; it would bear almost the 

 same relative position to the epistome as m the two figures if seen 

 from below, but the epistome would not advance so far beyond it 

 . Ventral surface rough, deeply excavated for the reception of the 

 legs, and with numerous strong ridges. There is a singular round 

 chitinous projection, surrounded with a stix,ng rough edge in the 

 median line between the coxae of the 4th pair of legs m both sexes 

 with a deep pit on each side of it. Gemtal plate of female straight 

 behind, rounded anteriorly, extending from a httle m front of he 

 4th coxee nearly to those of the first pair. That of the ma e of the 

 ordinary form and position. All the legs furnished with claws and 



Hah Very numerous in one nest of the wood-horing Ant 

 Camponotus herculeams (probably race Ugniperdus) near Innsbruck, 

 Tyrol and a few in other nests of the same Ant m the same place. 

 Mr. E. Bostock has since found it fairly abundant in the nests ot 

 Formica fusca at Buxton, Derbyshire. 



Ljllaps cuneifer, n. sp.^ (Plate XLIX. figs. 2-2/.) 



millim. millim. 



Length, about '77 *64 



Greatest breadth, about . . '60 "47 



Colour dull yellow-brown or hay, the specimens vary in depth of 

 tint from light to quite dark. 



Texture fully chitinized, smooth but not pohshed ; the whole 

 body covered with irregular reticulations averaging about^5 to ou 

 to the milUmetre, caused by fine raised chitinous ridges. No other 



TIT fl TK 1 Tl O" ^ 



SA«//pyriform, very slightly truncated in front rounded pos- 

 teriorly The whole body much arched on the dorsal surface. 



Mandibles of male (fig. 2 6) with the fixed arm of the chela 

 having a bifid or bidentate end, but not otherwise dentate. xVlov- 

 able arm strongly recurved at the distal end, and with a long, 

 chitinous, curved, accessory piece projecting beyond the Fincipai 

 part of the chela. Epistome (fig. 2 c) hyahne, almost rounded, but 

 with a slight tendency to a median point, the whole anterior edge 

 set with sharp points, of which one on each side is somewhat longer 

 than the others. The whole dorsal surface set with short, cuneiform, 

 shghtly curved hairs (fig. 2/) at almost equal distances, about lU 

 to 15 to the millimetre ; these also surround the periphery. 



Ventral surface of the female (fig. 2 a) with anal plate small and 

 spade-shaped ; genital plate large, with a semitransparent, rounded, 

 anterior edge overlapping the sternal plate. Peritreme conspicuous 

 almost straight. The plates on the ventral surface are composed ot 



1 According to Professor Eerlese's latest classification, althougli not ac- 

 cording to his former ones, this species and the others of the same genus m this 

 paper would probably be considered as belonging to the genus Sejus. i have 

 not thought it wise to adopt this view. 



