HEMIPTEUA— HOMOPTERA— JASSIDES. 309 



THAMNOTETTIX Zetterstedt. 



No species of tliis genus have been hitherto recognized among fossil 

 insects. The larger species here described certainly belong here or in the 

 immediate vicinity, the neuration of both tegmina and hind wings closelv 

 agreeing, as well as such other details of bodily structure as can be seen. 

 The small species is placed here with more doubt, since it is too poorly pre- 

 served to determine with any confidence. 



Table of the species of Thamnotettix, 



Larger species ; more thau three millimeters in length. 



Relatively stout bodied, with tegmina barel,v tliree times as long as broad 1. T. mittilata. 



Relatively slender bodied with tegmina considerably more than three times as long as broad. 



2. T. gannetti. 

 Smaller species; less than three millimeters in length 3. T. fundi. 



1. Thamnotettix mutilata. 



PI. 7, Fig. 6. 



A single specimen is preserved, showing only a jjart of the head but 

 the whole dorsal view of the rest of the body, with one of the tegmina 

 partly expanded. The body is long ovoid, very regular in shape with full 

 abdomen, hardly pinched posterioi'ly, but with full rounded curve. The 

 thorax is transverse, and the scutellum large for this genus, being if any 

 thing a little longer than the thorax The tegmina are barely three times 

 as long as broad, with interrupted dusky maculae along the outer half of the 

 costal margin, and slight signs of the same along the inner margin. The 

 hind tibiae are obscurely seen through the body, and appear as if very 

 densely spined with excessively minute and short spines, very different in 

 character from those of living types. 



Length of body, 4.55°"°; breadth, 1.4°""; length of tegmina, 3.75°"°; 

 breadth, 1.25°>°'. 



Green River, Wyoming. One specimen. No. 73, Prof L. A. Lee. 



2. Thamnotettix gannetti. 



PI. 6, Fig. 33 ; PI. 7, Fig. 5. 



Two specimens, differing a little in size, seem to belong together, both 

 preserved in a similar manner, showing a dorsal view with spread tegmina, 

 and wings, though in one case part was covered when the plate was drawn. 

 The body is rather slender, the abdomen tolerably full, but pinched 



