Mr. MacLeay on some new forms of Arachnida. 9 



is subovate and terminates in a very minute unguis in the 

 female. 

 Labial palpi seven-jointed and pediform ; but differ from the 

 feet not only in being longer, but also in the joint cor- 

 responding with the femora, which is stouter and emargi- 

 nate at the base. This joint moreover is furnished nearly 

 half-way on the inside with curved setae. The last joints 

 of the labial palpi are also thicker than the corresponding 

 tarsi of the true feet, and their basal joint is indistinct. 

 Mentum separated from the sternum by a transverse furrow, 

 longer than broad, restricted in the middle, and having a 

 semicircular apex. 

 Body slender, more than five times as long as broad. Head 

 confluent with body. Cephalothorax convex in front, and 

 as broad as abdomen, behind broader and depressed. 

 The cephalothorax above presents an anterior elevation 

 in the form of a pentagon, which is the true head ; the 

 base of the pentagon being the front of this head, which 

 is truncated in front, rounded off at the sides, and canali- 

 culated longitudinally in the middle, while each of the 

 lateral posterior angles of the pentagon supports a small 

 black eye. The head from the base of the above-men- 

 tioned pentagon is perpendicularly truncated, and thus 

 presents a vertical face, in which are situated the other 

 six eyes. 

 Sternum of three distinct segments. 



Abdomen more than twice as long as the rest of the body, sub- 

 cylindrical, only gradually tapering towards the point. 

 Fusi inconspicuous. Feet slender, of which the first pair 

 is longer than the third, and the third pair than the se- 

 cond, all being long and slender, and having inconspi- 

 cuous ungues. 

 Sp. 3. Deinopis Lamia. — Deinopis villosa grisea ; capite medio lineis 

 duabus ochraceis obscuris ; sterno vitta nigra lata utrinque instructo ; 

 abdomine punctis quatuor minutis nigrescentibus basalibus, macu- 

 lisque duabus versus medium nigris ; pedibus maculis nigrescentibus 

 variegatis. 

 Long. 5-^- lines. 



One of the distinguishing characteristics of the class Arach- 

 nida is the disposition of the segments of their body to become 

 confluent. Even when, as for instance in the scorpions, the 



