HEMlPTEliA— HOMOPTERA— JASSIDES. 31 1 



of the apical half; they are considerably more than three times as long as 

 broad, subequal tliroughout, with well rounded apex. The abdomen is long 

 oval, largest about one-third way from base, tapering beyond to a bluntly 

 pointed tip. 



Length of body, 2.75""; greatest breadth, 0.9""; length of tegmina, 

 2.5"" ; breadth, 0.75"". 



Green River, Wyoming. One specimen, Nos. 114 and 126, Dr. A. S. 



Packard. 



ACOCEPHALUS German 



Heer has described two species of this genus from the Miocene beds of 

 Radoboj, and two of our American fossils are referred dubiously to the 

 same group, though they differ considerably from each other in the general 

 form of the body. Heer's species, too, strictly interpreted, should be placed 

 elsewhere, though they are certainly near Acocephalus. 



Table of the species of Acocephalus. 



Sleuder species; body more than three times as loug as broad 1. A. adw. 



Stout species; body less than three times as long as broad... 2. A. callosus. 



1. Acocephalus ad.*;. 



PL 6, Fig. 29. 



Acocephalus adw Scudd., Bull. U. S. Geo!. Geogr. Surv. Terr., IV, 771 (1878). 



Two specimens represent the body of apparently a species of Acoceph- 

 alus. The head projects forward in a triangular form, is rounded at the 

 extreme apex, a little broader than long, and nearly twice as broad between 

 the small eyes as its length in advance of them. The body is slender, the 

 abdomen slightly tapering, rounded at the apex. The tegmina extend a 

 short distance beyond the body with parallel longitudinal veins. 



Length of body, 5.25""; breadth of head, 1.4'""; of middle of abdo- 

 men, 1.3"". 



Green River, Wyoming. Two specimens, Nos. 72, 100, F. C. A. Rich- 

 ardson. 



2. Acocephalus callosus. 



PI. 19, Fig. 15. 



Although the figure seems to show a bluntly rounded head very 

 uncharacteristic of Acocephalus, it evidently results from the mode of pres- 

 ervation, the bod)' being crushed on a three-fourths view, obscuring the 

 angularity of the front, which a careful examination of the specimen itself 



