294 TERTIARY IXSECTS OF NORTH AMERICA. 



thorax, and, as viewed above, the eyes make up one-half of this narrow 

 part ; the front projects abruptly in front of the eyes by one-third their 

 length, is well rounded anteriorly with brief parallel sides ; the eyes are 

 moderately large, not very tumid. The thorax is transverse, arcuate, equal, 

 short ; the soutellum very large, triangular, pointed, with nearly straight 

 but slightly arcuate sides, attenuating the apex. Legs slender, the hind 

 tibire armed externally with three distant prominent spines. Tegmina 

 membranous, ample, the longitudinal veins first forking about the middle 

 of the wing, the radial here dividing into two branches, which throw many 

 apical branches to the costal margin at and beyond a pterostigma ; tlie 

 ulnar branches, a little farther on, subdivide into many forks, connected 

 at their origin by cross- veins, and most of these forks, without another series 

 of cross-veins (such as occur in Cladodiptera), again divide shortly before 

 the apex. Abdomen broad, abruptly tapering apically to a bluntly pointed 

 tip. 



A single species is known. 



Florissantia elegans. 

 PI. 19, Fig. 12. 



Two specimens with their reverses present a very fair view of this 

 delicately veined insect, but the one figured does not show the head. The 

 body, shaped like that of a diminutive Cicada, is of a uniform dark color 

 with pale abdominal incisures; the thorax is minutely and distantly punc- 

 tate ; the scutellum finely sulcate down the middle ; the legs are slender and 

 apparently longitudinally streaked with pale, and the tibial spines are black. 

 The tegmina are about three times as long as broad, the ])terostigma situated 

 just before the middle of the apical half, rounded, subquadrate, a little longer 

 than deep ; the cross-veins uniting the longitudinal series are mostly oppo- 

 site the proximal end of the pterostigma, and the apical forks of the longi- 

 tudinal veins are about as long as the pterostigma. 



Length of body, 12.5'°'°; breadth at base of abdomen, 4.6"""; l^readth 

 of head between the eyes, 0.85°"° ; length of tegmina, 1 2.25°"" ; hind femora, 

 S""" ; hind tibia?, 5.5"'"'. 



Florissant. Two specimens, Nos. L104 and L751, 1.783 and 1.789, 

 Princeton Collection. 



