AMERICAN ORTHOPTERA. 281 



sulcus but little sinuate, the anal field being acute ovoid in shape. Wings with 

 the appendicular field having the angle of insertion obtuse-angulate, coriaceous, 

 apex well rounded ; axillary vein biramose. Supra-anal plate transverse sub- 

 triangular, apex with a rather broad V-shaped emargination. Cerci elongate, 

 subequal, somewhat depressed, exceeding the subgenital plate by half their 

 length. Subgenital plate large; apex roundly produced, narrowly and deeply 

 fissate ; cereal emargination very marked. Limbs with the genicular spine absent 

 on the anterior femora, well developed on the median and posterior pair; meta- 

 tarsi of the posterior limbs equal to the succeeding tarsal joints in length. 



General color warm sieuna, darkest on the pronotum, the proximal portion of 

 the tegmina, the lateral margins of the abdominal segments, the cerci and the 

 head. Lateral portions of the pronotum and the basal field of the tegmina pel- 

 lucid. Eyes blackish brown. Limbs pale. 

 Measurements : 



Length of body, ...... 7.5 mm. 



Length of pronotum, ..... 2. " 



Greatest width of pronotum, .... 3. " 



Length of tegmina, ...... 7.5 " 



Greatest width of tegmina, .... 2.5 " 



Genus PLECTOPTERA Saussure. 



1864, Plectoptera Saussure, Mem. l'Hist. Nat. Mexiq., iv, p. 175 Included 

 species porcellana and poei/i; as the former is figured, it can justly be regarded as 

 the type. 



Plectoptera pulicaria Saussure and Zehntner. 



1893, Plectoptera pulicaria Saussure and Zehntner, Biol. Cent.-Amer., Orth.. 

 i, p. 86. [Bugaba, Panama.] 



Three female specimens; Turrialba, Costa Rica. (Schild ami 

 Burgdorf. ) [U. S. N. M.] 



Plectoptera hastifera n. sp. 



Type: 9; Turrialba, Costa Rica. (Schild and Burgdorf.) 

 [Cat. No. 6938, U. S. N. M.J 



Closely allied to P. pulicaria and P. circumdata Saussure and 

 Zehntner, but differing from the former in the more transparent 

 character of the lateral portions of the pronotum, the slenderer teg 

 inina, more hastate axillary field of the wings, and the different 

 coloration ; and from circumdata in the smaller size, the much more 

 lanceolate axillary field of the wings, and the different coloration of 

 the pronotum. 



Size very small ; form ovate; surface polished. Head slightly projecting be- 

 yond the pronotum; interspace between the eyes considerably less than that 

 between the antennal bases; eyes compressed reniform, the lower face well hol- 

 lowed to receive the antennae, which are moniliform, beset with stiff hairs, and 

 slightly exceeding the body in length. Pronotum transverse, sub- rectangular : 



TRANS. AM. ENT. SOC. XXIX. (36) SEPTEMBER. 1903 



