CRICKETS — CHOPARD 251 



Genus Trigonidoniimus Caudell, 1912 

 Trigonidomimus ruficeps, new species 



Types: Holotype, female; Covendo, Bolivia, August 1921, Mann 

 (USNM 62064). Allotype: Pucallpa, Rio Ucuyali, Peril, Nov. 2, 

 1947, Schunke (d') (USNIVI). Paratype: Pucallpa, Rio Ucuyali, 

 Peril, Mar. 15, 1948, Schunke (9) (USNM). 



Female: Size a little larger than the other species of the genus. 

 Head entirely reddish, smooth; vertex sloping, ending between the 

 antennae in a very short and narrow rostrum. Face rufous yeUow, 

 smooth. Eyes large, dorsoventrally lengthened; ocelli scarcely visible. 

 Labial palpi brown; maxillary palpi wanting. Antennae (a short part 

 remains) brown with very large, flattened first joint. 



Pronotum very dark brown, shining, almost glabrous; with straight 

 anterior and posterior margins, both bordered with long bristles; disk 

 feebly convex with a faint median furrow; lateral lobes concolorous, 

 their inferior margin straight, anterior angle right, feebly rounded. 

 Abdomen blackish brown. Cerci yellowish. Ovipositor rather short, 

 very feebly curved upwards; apical valves extremely narrow and acute. 



Legs long and slender. Anterior femora yellowish at base and above, 

 ^vith internal face brown, external face brown at apex, the brown 

 spot narrowing towards the base; tibiae brown with a rather small, 

 nearly round tympanum at base of the internal face; apex armed with 

 two small and slender spurs; tarsus almost as long as the tibia, the 

 metatarsus longer than the other two joints united. Median legs 

 similar to the anterior ones. Posterior femora moderately swollen at 

 base, without filiform apical part, adorned externally with thi'ee longi- 

 tudinal brown bands, uniting after the middle; tibiae brown, armed 

 with three spines on each margin and six slender apical spurs ; medio- 

 external spur a little longer than the superior one, which is very thin; 

 superointernal spur much longer than the median. Metatarsi very 

 long. 



Elytra extending almost to the apex of abdomen, dark brown; 

 dorsal field with five feebly oblique, parallel veins, the two internal 

 ones uniting towards the middle; lateral field high, blackish brown, 

 with three distant, feebly incurved at base veins. Wings no longer 

 than the elytra. 



Male (allotype): General aspect and color of the female. Head as 

 in the female; palpi blackish; 5th joint of the maxillary palpi very 

 large, feebly widening at apex, with slightly concave superior margin, 

 apex lengthily truncated, feebly rounded, internal margin very short. 

 Legs as in the female but somewhat more blackish. Elytra blackish, 

 extending only to the apex of the 6th abdominal tergite; mirror large, 



