DERMAPTERA SALTATORIA. 41 



Genus AGANACRIS. 



Fcem. Corpus gracile. Caput breve, convexum; fastigium bicari- 

 natum ; frons erecta, non carinata. Oculi prominuli. Prothorax brevis, 

 postice latescens et bicarinatus ; margo posticus rotundatus. Vagina valde 

 arcuata, abdominis dimidio longior. Pedes gracillimi ; femora postica 

 abdomine longiora, subtus uniseriatim spinulosa, basi incrassata; tibia) 

 posticae longiores, biseriatim spinulosa?. Aloe anticae corpore paullo 

 longiores. Alae posticae adhuc longiores. 



Female. Body slender. Head sbort; vertex convex; tip with two 

 well-defined approximate keels, which are continued between the sockets of 

 the antenna?; front erect, without keels. Eyes elliptical, promineut. 

 Prothorax short; disk widening hindward, with a short keel on each side 

 near the hind border, which is rounded. Sheath of the oviduct much 

 curved, more than half the length of the abdomen. Legs very slender; 

 hind femora longer than the abdomen, incrassa ted near the base, with a 

 row of minute spines beneath; hind tibia? rather longer than the hind 

 femora, with two rows of minute spines. Fore wings a little longer than 

 the body, moderately broad. Hind wings ample, extending beyond the 

 fore wings. 



1. Aganacris micans. 



Fcem. Nigra, glabra ; fades testacea ; femora postica albo bifasciata ; 

 alee anlicce subcupreo nigra. 



Female. Black, smooth, shining. Face testaceous. Eyes tawny. 

 Hind femora with two irregular white bands on the outer side before the 

 middle. Fore wings shining, with a slight cupreous tinge. Hind wings 

 blackish. Length of the body 10 lines; expansion of the hind wings 

 28 lines. 



St. Paul, Amazon Region. From Mr. Bates' collection. 



Page 358. 

 Valna nigropicta. 



Fcem. Albida; caput punctis fascia vittisque duabus nigris ; antenna 



nigro annulata ; prothorax lineis duabus angulatis nigris; vagina 



recta, abdominis dimidio eequilonga ; pedes nigro notati, femoribus 



quatuor posterioribus spinis arcuatis armatis ; alee brevissima. 



Female. Whitish, rather stout. Head with a few black points on the 



vertex, with a black band between the eyes and with a black stripe 



between each eye and the hind border; tip of the vertex porrect, furrowed, 



conical. Eyes tawny, round, very prominent. Antennae with black rings. 



Prothorax somewhat saddle-shaped, with two transverse impressed lines and 



with two black angular longitudinal lines, which widen towards the hind 



border ; two slight transverse ridges near the hind border terminating in 



knobs; fore border arched; sides and hind border nearly straight. 



Sheath of the oviduct straight, about half the length of the abdomen. 



Legs irregularly marked with black; four posterior femora armed beneath 



