1944 ] 
Ammobcenetes from Nevada 
147 
AN AMMOBCENETES FROM NEVADA 
(ORTHOPTERA; GRYLLACRIDIDcE) 
By H. F. Strohecker 
Kenyon College 
A few years ago Ira LaRivers of Reno, Nevada sent me, with 
other Orthoptera, a fine series 1 of an undescribed species of 
gryllacridid. The specimens show the trimerous front and hind 
tarsi and crowded, long spurs on the hind tibiae characteristic 
of Ammobcenetes Hubbell (1936). I have given to the species 
the name of its discoverer, who has made careful studies of 
Nevada insects. The use of spur and calcar below is that of 
Hubbell (1936, p. 16). 
Ammobaenetes lariversi n. sp. 
Type, male. Sand Spring Dune, Churchill County, Nevada, 
July 5, 1941. 
Considerably smaller than the only other described species, 
A. phrixocnemoides (Caudell). Front with a low, broad carina; 
eyes moderate in size, rather protuberant. Front coxa with a 
small, lateral spine. All the femora are unarmed. Hind femur 
stout, tapering rapidly at its apical third. Front tibia somewhat 
spindle-shaped, convex above, below convex on basal half, 
plane on apical half. The armament of the front tibia consists 
of a pair of dorsal calcars (the anterior 2/3, the posterior 3/4 
as long as first tarsal joint), a pair of ventral calcars (anterior 
equal to, posterior much longer than, first tarsal joint), three 
short, slender spurs on the ventrocephalic carina and four large, 
blade-like spurs on the ventrocaudal carina. Claws of front 
tarsus asymmetric, the anterior longer. Middle tibia with four 
slender spurs on each dorsal edge, four slender spurs on ventro- 
cephalic edge and one on ventrocaudal edge. The left middle 
tibia has three ventrocephalic and one ventrocaudal spur. The 
calcars of the middle tibia are proportioned as those of the front 
tibia but are much smaller. Claws of middle tarsus symmetrical, 
about equal to the shorter claw of front tarsus. Hind tibia 
1 The specimens came to me in alcohol and were hardened in xylol before pin- 
ning. 
