298 TERTIARY INSECTS OF NORTH AMERICA. 



Subfamily RICANIIDA Stal. 



A 



species of Ricania has been described by Giebel from amber ; 

 besides this the only fossils possibly referable to this group are those men- 

 tioned below, one of them of extraordinary character, so that in all proba- 

 bility it should more properly be referred to a distinct subfamily, so greatly 

 does it differ from all Fulgorina in the multiplicity of the principal longi- 

 tudinal veins at the base of the wing, the branching of the veins of the 

 clavus and the irregular reticulation of part at least of the corium. 



HAMMAPTERYX gen. nov. {aix^a, TtTepv?,). 



Tegmina exceptionally broad, subtriangular, with strongly rounded 

 apex, produced more above' than below. Costal margin somewhat arched 

 at the base, the costal vein distant from it, running into it considerably 

 beyond the middle (where it turns rapidly upward), and connected with it 

 by numerous oblique veins. Radial vein forked at the base of the wing, 

 and each branch again dividing before the middle, all the offshoots of the 

 upper and the upper offshoots of the lower branch with a strong superior 

 arcuation at the tip of the costal vein, giving the wing a knotty appearance. 

 Ulnar vein also divided at base, each of its branches immediately divid- 

 ing and again a second time at or before the middle of the wing, while 

 both radial and ulnar nervules still farther subdivide so that multitudinous 

 veinlets reach the border ; they are further united intimately by three series 

 of cross-veins like the gradate veinlets of Hemerobida? among Neuroptera, 

 but here subparallel to the outer margin, one set, the weakest and short- 

 est, in the middle of the wing, the second and third series on either side of 

 the middle of the outer half, but distant from each other. The anal area 

 is occupied by delicately and longitudinally branching veins, which 

 nowhere tend to unite apically. 



Hammapteryx reticulata. 

 PI. 6, Fig. 34. 



A pair of tegmina of which only the upper third is shown in one of 

 them, while the other is nearly perfect. The two outer series of cross-veins 

 are equidistant in the upper half of the wing, but below it approach each 

 other by the gradual removal of the outer away from the border, the middle 

 series being parallel to the border in tliis part of the wing. Within this 



