54 TERTIARY INSECTS OF NORTH AMERICA. 



forming with these a very slightly curved row, opening forwards, of equi- 

 distant eyes. Eyes of second row from one-eighth to one-tenth the size of 

 those of the first row, situated behind and within the middle anterior pair, so 

 that lines drawn througli the middle of the large and small ones would meet 

 in a right angle behind the small ones and leave them distant from each other 

 by about their own diameter; the outer edge of either of the small ones is 

 behind the inner edge of one of the large ones; the eyes of the third row 

 are not discernible on either of the specimens, and on one the lateral eyes, 

 on the other the eyes of the second row, can not be seen. 



Palpi of the male with the tip very large, conchiform, as if made of 

 three whoi'ls, the middle twice as large as the other two together and sub- 

 globose, the terminal small and globular. Only one palpus is exposed, but 

 the other may partially be seen through the cephalothorax. Abdomen 

 shoil ovate, somewhat larger than the cephalothorax, being somewhat 

 longer and slightly broader, suhacuminate at tip, with a pair of short styles 

 darkest in a broad mediodorsal band. Legs moderately long and slender, 

 subequal, not greatly tapering, furnished throughout and rather abundantly 

 with generally alternate, divergent, long, and tapering spines, fully as long 

 as the width of the joint from which they rise. 



Length of body, ^HS-"™; cephalothorax, 2"" ; abdomen, 2.85""°; width 

 of cephalothorax, LG™"; abdomen, 1.7"™; longer axis of middle section of 

 palpal swelling, 0.8""; length of whole sweUing, 1.45."°"; length of first pair 

 of legs, 5.5""°; second pair, 5.5""; third pair, 4"" (?) ; fourth pair, 4.75"". 

 Excepting in the palp the measurements are those of the female. 



One of the specimens is a male; the other, the palpi of which are not 

 preserved, is judged to be a female merely from its variation from the other 

 in its larger abdomen. The species is readily distinguished from the others 

 by the rounded outline of the cephalothorax both on the sides and on the 

 strongly convex front. 



Florissant. One <?, No. 1081; one ?, Nos. 8282 and 8459. 



2. Paeattus evocatus. 



Cephalothorax subquadrate, somewhat less than twice as long as 

 broad, slightly broadest posteriorly, with straight, scarcely divergent sides; 

 anterior and posterior margins broadly convex, the lateral angles well 

 rounded off"; eyes of anterior row large, round, equal, equidistant, the 

 middle ones at less than their own diameter from the front edge and from 



