AHACHNIDES AEANEIDES LATBBIGBAD^B. 59 



The sex of both specimens is uncertain. 'Flic species is readily dis- 

 tinguished from the others liv its small si/.e. slender and long legs, and the 

 complete consolidation of the tibia and lirst tarsal joint. 



Florissant. N..S. IMITT, 10377. 



3. TlIOMISUS DEFOSSUS. 

 PI. 11, V\g. "3,8. 



Cephalothorax Kent at a strong angle with the abdomen and perhaps 

 distorted in the single specimen known, hut as preserved ii is of an oval 

 >hape, slenderer than the abdomen, but not much smaller, half as long 

 airain as broad, similarlv ;ind fully rounded at either end, the sides not 

 strong! v convex ; it appear- to have a median transverse constriction and 

 incision. Nothing can lie made out of the eyes, but a single large, black, 

 subcircnlar, palpal swlliii'.: represented uf the same tint with the rest and 

 merged with the cephalothorax on the plate) lies bordering the middle 

 of the front, a little broader tlian Ion--. Abdomen very broad ovate, not 

 more than a third to a fourth lo.i-vr than broad, the base slightly liroailest 

 and broadlv rounded, the ape\ similarlv rounded and tlie sides lieiweeii the 

 well-rounded corners nearly straight ; a faint separation into three or four 

 segments i-an al ien, and the surface is sparsely cosered with minute 



short lilack hairs Front pairs of legs much larger than the hinder, show- 

 ing that the species is ,. ie of the true Thomisina 1 . the femora large, swollen 

 in the middle and depressed, the front pairs much longer than, the' hinder 

 pairs nearly a> Ion- as, the ab.lonieii: the tibia- proper are very distinctly 

 separated from the lirst joint of tarsi i in the other species it is reckoned with 

 them in the measurements . excepting mi the hindmost legs having a distinct 

 oval form of their own, about half as long again as liroad; the lirst joint of 

 the tar>i is only a little shorter than the femora (on these same legs) and 

 with the tibia lon-vr than the femora: it is armed sparingly with long and 

 slender recumbent spines; the second and third joints of the tarsi are sub- 

 ei|iial, to-vther sliorter than the iirst joint, and besides their sparse clothing 

 ..I' short tine black hairs the tip is armed with a single short blunt claw. 



Length of cephalothorax, 3.;j ml " ; breadth, 2.1 : length of abdomen, 



4.2"""; breadth, -'.7"" ; length of lirst pair of legs (as preserved), 7.7.")""" ; its 

 femora, 3.5 mi " ; tibia (proper), LI"""; (true) first joint of tarsi, 2.4""" ; second 

 joint (as preserved), 1""" ; femora of second pair of legs, 3 mm ; third pair of 



