SCUDDER. NORTH AMERICAN CliUTHOl'lULI. 101 



distances by a smaller oue. Middle femora with 1-4 spines on the front 



carina, most numerous in the 9 and the subapical the largest, the 



hind carina similarly armed, but one spine genicular and the others as 



numerous in the $ as in the ^. Hind femora much shorter than the 



body, considerably more than twice as long as the fore femora, stout, 



being in the ^ less than three times as long as broad, with hardly any 



subapical constriction, that is, tajaering almost regularly to the apex, 



the surface with no raised points, the outer carina pretty regularly and 



rather minutely denticulate in the distal half or less, exclusive of the 



geniculation {$), or minutely denticulate throughout (9)) the inner 



carina similar to the outer, but in the $ more extensively denticulate 



than the outer, the intervening sulcus narrow. Hind tibiae straight in 



both sexes, distinctly shorter than the femora, the upper surface 



rather broad in the $ and basally constricted, beneath with a longer 



{$) or shorter (9) series of median spines, besides the apical pair; 



spurs subopposite, the basal pair at the end of the proximal third of 



the tibia (c^),"* about as long as the tibial depth {$), or two to three 



times as long as the tibial depth (9), set at an angle of about 50° 



(J) or 30° (9) with the tibia and divaricating as much, their tips 



scarcely incurved ; inner middle calcaria not greatly longer than the 



outer, less than half as long again as the others or as tlie {^) spurs, 



nearly as long as the first tarsal joint. Hind tarsi much less than 



two fifths as long as the tibia, the first joint not so long as the rest 



together, the second but little longer than the third and with it a little 



shorter than the fourth. Cerci rather slender and regularly tapering, 



pointed, considerably shorter { ^) or considerably longer ( 9 ) than 



the liind femoral breadth. Ovipositor about two thirds as long as the 



hind femora, its upper margin feebly arcuate, the apical two thirds 



subequal, the apex slightly upturned and very acuminate, the teeth of 



the inner valves long, aciculate, the distal arcuate. 



Length of body, $ \2 mm., 9 H.o mm, ; pronotum, $ 3.5 mm., 

 9 3.25 mm.; fore femora, ^ 4 mm., 9 3.6 mm. ; hind femora, $ 8.75 

 mm., 9 7'.6 mm.; hind tibiae, $ 8.3 mm., 9 7.25 mm.; ovipositor, 

 5.2 mm. 



4 ^, 1 9. Ft. Wingate, N. Mex. (Shufeldt), U. S. Nat. Mus. 



The species is most nearly allied to G. devius, from which it difi\;rs 

 principally in its smaller size and the armature of the femora. 



* The single 9 I have seen has four pairs of spurs on one tibia, the basal 

 pair at the end of the proximal fourtli of the tibia, while the other tibia has but 

 a single non-opposite pair in the middle of the tibia. It is further anomalous in 

 the excessive length of the spurs, in contrast to the $. 



