360 TERTIARY INSECTS OF NORTH AMERICA. 



tal area of the hemelytra of uniform width ; and the species described below 

 from Florissant with smooth and tumid pronotum and the costal area of the 

 hemelytra enlarging apically. They differ also in the length of the last 

 antennal joint. 



EOTINGIS ANTENNATA. 

 PI. 23, Figs. 1, 3. 



Two specimens, both figured, were all that were seen of this species 

 when it was described ; one shows a dorsal view, the other lies more upon 

 its side ; of the former the median projection in front of the head, shown 

 upon the plate, is a mistake, and the two appendages can not be regarded 

 as antennae, a portion of one of which crosses the right fore femur ; the right- 

 hand apparent appendage of the head is probably the rostrum, but its 

 apparent distal half is a mere discoloration of the stone at a different level; 

 the left hand one is probably the left fore femur, a broken fragment of which 

 or of a tibia appears as if attached below to the pronotum. The color 

 appears to be uniformly dark, the legs perhaps a little paler. The last 

 antennal joint is as long as the elongated middle joints, but it enlarges grad- 

 ually toward the tip, and then, at a distance from the tip of twice its breadth, 

 suddenl}' diminishes and is rounded off. The prothorax is largest a little 

 behind the middle, and tapers considerably in front, being tumid whether 

 viewed laterally or from above, but especially the former ; it is well rounded 

 posteriorly, truncate anteriorly, and smooth. The hemelytra extend far 

 beyond the abdomen, and are filled with an entirely irregular reticulation, 

 in which the meshes are approximately of the same size and of about the 

 diameter of the antennal club; the longitudinal vein delimiting the costal 

 area runs parallel to and distant from the costal margin in the basal half of 

 the hemelytra, and then diverges gradually from it in a graceful curve. 



Length of body, 3.65 mm ; including tegmina, 4.5 mra ; of tegmina, 

 3.75 mm ; breadth of thorax, l.l mm ; length of antennas, 3. 75 mm ; hind femora, 

 1.25 mm . 



Florissant. Four specimens, Nos. 2698, 4365, 5596, 10763. 



Family ACANTHIID^ Leach. 



The only fossil that has ever been referred to this limited group is the 

 one described foelow. 



