58 TERTIARY INSECTS OP NORTH AMERICA. 



long as they; the whole leg is devoid of armature or clothing and none is 

 perceptible on the abdomen. 



Length of abdomen, 3"""; breadth, 2.-5"'" ; length of third pair of legs, 

 S.S""""; its femora, LSS™" ; tibiae, 1.65°""; tarsi, LS"""; first joint of same, 

 l.-i""; second joint, 0.6"""; fourth pair of legs, 7.45"""; its femora, 2.75""; 

 width of same, 0.5"" ; its tibiae, 1.5"" ; width of same at base, 0.25"" ; at 

 tip, 0.4""; its tarsi, 3.2""; width of same, 0.1""; length of first joint, 2""; 

 second joint, 1.2"". 



A single specimen is preserved, in which all anterior to the two hinder 

 pairs of legs is lost. The species is readily distinguished from either of 

 those here described by the unequal width of the tibiae, as well as for the 

 disparity in width between the tibiae and tarsi. As the front legs are want- 

 ing, this may not so properly be referable as the others to the Thomisides 

 rather than the Philodrominae. 



Florissant. Nos. 5502 and 7521. 



2. Thomisus disjunctus. 

 PL 11, Pig. 9. 



Cephalothorax obscure in both specimens, and apparently preceded by 

 a slender beak, more than half as long as the abdomen and divided into two 

 lateral halves closely united ; they seem to be a pair of elongated cheliceres, 

 but are poorly preserved in both cases. Abdomen rounded, short oval, 

 about a fourth longer than broad, with both ends equally rounded. Legs 

 long and slender, the two front pairs longer than the hinder two, the first 

 also considerably longer than the second ; the femora are long and slender 

 (the front pair about as long as the abdomen), flattened and tapering at 

 either end; the tibiae and first tarsal joint are completely consolidated into a 

 single piece, so that the line of demarkation can not be seen, and are very 

 slender, equal, as long as the femora; the other tarsal joints are together 

 less than half as long as the previous member and scarcely slenderer than 

 it, terminating in a slightly curved delicately pointed claw as long as the 

 width of the tarsus. 



Length of abdomen, 1.75""; breadth, 1.45""; length of first pair of 

 legs, 4.2""; its femur, 1.8""; tibia, 1.7""; tarsus, 0.7""; second pair, 

 2.85""; femur, 1.2"" ; tibia, 1.15""; tarsus, 0.5""; tibia of third pair, 1.05""; 

 tarsus, 0.4"" ; fourth pair, 2.2"" ; femur, 1"" ; tibia, 0.8"" ; tarsus, 0.4"". 



