38 Transactions. — Zoology . 



The cephalothorax is oval, convex, glossy black ; constricted laterally 

 forwards ; medial fovea deep ; the caput is strongly convex, and its normal 

 grooves well defined ; the profile line forms a double arch, the highest part 

 being at the occiput ; the fore-part of this area is prominent, projecting 

 over the clypeus, whose height equals the depth of the ocular area. 



The four intermediate eyes form a trapezoid, whose length is greater than 

 the iuterval between the fore-central eyes ; the hind-centrals are about one- 

 quarter of an eye's breadth apart; the laterals are placed obliquely on 

 strong tubercles, the space between them is about one-half their diameter. 

 The eyes are moderately large and have a pearly lustre. 



The legs are moderately long and strong, 1, 2, 4, 3, the second pair 

 nearly equals the first in length (9 mm.) ; they have a yellowish hue and 

 well-defined brown annuli ; the armature consists of strong hairs. 



The palpi are not very long, and are indistinctly annulated with brown 

 and black tints. 



The fakes are prominent, conical, and nearly vertical, glossy dark 

 brown. 



The maxilla, are convex, and somewhat obliquely truncated, they are 

 glossy dark brown ; the labium has the same hue, is semicircular, 

 pointed. 



The sternum is heart-shaped, dull brownish-black, stamped with the 

 seven-lobed mark. The abdomen is a long oval, convex, and rises almost 

 perpendicularly from the thoracic junction ; posteriorly it terminates in 

 three blunt transversely wrinkled protuberances, the central one is much 

 the longest ; it is of a very glossy dark green — in some examples nearly 

 black hue, almost devoid of hairs, except on the tail-like extremity and 

 lateral lobes which are a dull black, faintly streaked with yellowish-brown, 

 furnished with short erect hairs ; a broad irregular silver band with lake- 

 coloured marks extends along the medial line to the base of the central 

 protuberance, where it ends in a more or less defined silver crescent ; the 

 lateral margins are devoid of the longitudinal wrinkles, have a dull black 

 hue, and are mottled and streaked with pale brownish-yellow ; ventral 

 surface dull black. The vulva consists of black oval protuberances, over 

 which hangs a broad, curved, wrinkled, membraneous process, directed 

 backwards. 



The male is much smaller than the female, being only 5 mm. in length. 

 The cephalothorax, which equals the abdomen in length, is a broad oval, dull 

 brownish-black, finely rugulose. The legs are somewhat like those of the 

 female in colour ; the armature consists of strong spines and a few fine 

 dark hairs. The palpi are short, the three first joints have a yellowish- 

 brown colour ; at the apex of the cubital joint there is a strong bristle ; the 



