gO TERTIARY INSECTS OF NORTH AMERICA. 



strongly convex, but no certain trace of the eyes can be made out. The 

 palpi (female) are stout and large, tapering apically, but bluntly pointed. 

 The legs are' very stout, but unfortunately hardly any of them perfect. 



Length of cephalothorax, 3.6 mm : breadth, 2.7 Ilim ; projection of palpi 

 beyond front, 2 mm ; their breadth, 0.4 mm ; breadth of fore femora, l mm ; 

 length of femora of first pair of legs, 2 mm ; tibiae, 3 mm ; femora of second pair 

 of legs, 2.5 mm ; tibiae, 3 mm ; tarsi, 3 mra ; femora of third pair, 1.5 mm ; tibise, 

 2 mm ; tarsi, 2.5 mm ; femora of fourth pair, 2.25 mm . 



Florissant. One ?, No. 7177. 



3. TETHNEUS HENTZII. 



PL 11, Fi. U(S). 

 Tethnceus lientzii Scudder, Zittel, Huuilb. d. Fallout., I, ii, 744, fig. 9^8 (1885). 



This species is represented by seven individuals, one of them in dupli- 

 cate and all of them males. About half of them are well preserved. The 

 cephalothorax is short ovate, almost pyriform, broadest behind and strongly 

 convex in front, with no demarkation between the cephalic and thoracic 

 portions of the corselet ; although there are traces of the eyes, their position 

 and relations can not be satisfactorily determined. Palpi short, the terminal 

 joint barely separated entirely from the front, very large and globose, a 

 little longer than broad by reason of a broad bulbous protrusion of .the 

 anterior extremity, which, how r ever, is not clearly apparent in all the speci- 

 mens by their mode of preservation ; in one specimen the upper anterior 

 extremity, and that only, is covered with rather long and close bristly hairs, 

 forming an open tuft. Abdomen nearly circular, a little longer than broad, 

 only a little larger than the cephalothorax and of a lighter color than it, 

 with a darker, broad, median patch not so deep in tint as the cephalothorax. 

 Legs short, stout, tapering, spinous, and hairy throughout, of not greatly 

 unequal length, the femora very stout and tapering more rapidly near the 

 tip than elsewhere. 



Length of body, 6.5 mm ; width of same, 3"' m ; length of cephalothorax, 

 3.5 mm ; of abdomen, 3.25 mm ; longer diameter of last joint of palpi, 1.4""": 

 length of first pair of legs, 13.75 mm ; its coxa, 1.4 mn '; femur, 3.1 mm ; tibia, 

 l mm ; first tarsal joint, consolidated with the tibia, 2. 75 mm ; the tarsus proper, 

 f) nim ; length of second pair of legs, ll.f> mm ; its coxa, 1.5 mm ; femur, 2.7 mm ; 

 tibia, I 1 "" 1 ; first tarsal joint, 2.3 Imu ; tarsus proper, 4 mm ; length of third pair 



