170 TEETIAKY INSECTS OF SOKT11 AMERICA. 



1. TRIBorilRVSA VKTrSfl'LA. 



PI. 14, Fig.. 9. 



The stone on which the single specimen referred here occurs has 

 unfortunately been broken across the wings, and the apical half is lost; 

 otherwise the specimen would be nearly perfect, the head, thorax, evrs, 

 and antenna being well preserved. The antenna' are unusually short, 

 being a little shorter than the body and more tapering than usual in this 

 family. The head is well rounded, the eyes neither very large nor promi- 

 nent, the prothorax tapering a little anteriorly, the sides a little arcuate, 

 the front slightly concave. 



( )nly the basal half of the wings being preserved, little can be said of 

 them, but the costal margin and area are much as in T. firmata, and the 

 neuration is so peculiar as to separate the species readily from the others: 

 there are about a dozen transverse veins in the costal area ; the transverse 

 veins uniting the radius and its sector are rather more numerous than in 

 the other species of the genus; the cross-vein uniting at base the sector 

 and the first cubital vein strikes the latter so as to form a continuation of 

 the vein closing basally the double cubital cell ; the upper of these two 

 cells is scarcely smaller than the lower; the upper cubital vein arises 

 directly from the radius without the support of a basal cross- vein ; and the 

 proximal cells between the sector of the radius and the upper cubital vein 

 are, excepting the first (which is of irregular shape), not so disproportion- 

 ately large as in the other species, being less than half as broad again as 

 long, about as long as the subnulial cells, and only a little oblique, differ- 

 ing in all these respects from both the other species 



Length of body (estimated), 12 mm ; of head and thorax, 4.;V""- : 

 antenna:-, ll mm ; length of wings as preserved, 9.5""": probable full length, 

 14 mm ; presumed breadth, .(.:>""". 



Florissant. ( hie specimen, Xo. 11204. 



2. TRIBOCHRYSA INEQUALIS. 



Tribocliri/xn iHn//i.v Scudd., /.illol. Hanilli. il. Pulwont., I, ii, 7/7, Fig. "JrtJ (1885). 



The single specimen referred here has all the wings superimposed on 

 one another, but in addition a portion of the slender antenna 1 and the large 

 globular eyes can be seen, with faint traces of the head, thorax, and abdomen. 



