86 TEETIAEY INSECTS OP NORTH AMERICA. 



abdomen, and the cephalic and thoracic portions completely blended ; possi- 

 bly it is slightly longer than broad. The eyes can not be made out ; the 

 terminal joint of the palpi (as preserved, sessile) is moderatel}' large, globular 

 or slightly ovate, black, but none of the internal structure can be made out. 

 Abdomen subquadrate, tapering very slightly from in front backward, the 

 front straight with well rounded lateral angles, the posterior extremity well 

 rounded, the whole nearly twice as long as broad, the sides nearly straight. 

 Legs closely resembling those of E. delita, the second pair being unusually 

 long, but oven more than in that species exceeding proportionally the extent 

 of the fourth pair ; the femora are onl}^ moderately stout, and, like the tibia3, 

 though to a less extent, are furnished with delicate spinules, less divergent 

 but more abundant than usual, exceeding in length the Avidth of the tibiae. 



Length of body, 3""" ; width of cephalothorax, 1™"' ; lengtli of abdomen, 

 2.25°""; its width anteriorly, LGS""" ; posteriorly, 1.2"""; diameter of last 

 palpal joint, 0.35™" ; length of first pair of legs, 9""" ; tibite, 2.9""" ; tarsi, 

 4™"; second pair of legs, 8""" ; tibiae, 2.1°"" ; tarsi, 3.5""" ; third pair of legs, 

 4.85"""; tibite, 1.3"""; tarsi, 2.1"""; fourth pair of legs, 6.5"'™: tibiae, 2"""; 

 tarsi, 2.5™"'. 



This species differs from all others of the genus here described in the 

 shape of the abdomen, which is elongate, and the sides of which are not 

 rounded but subparallel. In the characteristics of the legs, however, it re- 

 sembles the preceding. A single male, represented by both obverse and 

 reverse, is better preserved than the figure in the plate would indicate, as 

 the form of the whole abdomen can be seen as well as of the last palpal joint. 

 The figure morever indicates the shape of the b(»dy altogether wrongly, as 

 the cephalothoi'ax should be smaller and the abdomen should taper con- 

 siderably behind, as the measurements show. 



Florissant. One ^, No. 857fi and 8806. 



5. El'EIRA VULC'ANALIS. 



ilfrtfe.— Cephalothorax nearly globular, scarcely longer than broad, the 

 cephalic and thoracic portions completely blended, but mai-ked by a large 

 semicircular depression anteriorly, occupying a little more than the front, 

 i. e., encroaching upon the lateral margin, and of a darker brown than the 

 thoracic portion. Front somewhat convex, with insufiicient trace of eyes. 

 Cheliceres stout, as long as the cephalic portion of the corselet, tapei'ing, 

 bluntly rounded at the tip. Last joint of palpi very large, nearly as large 



