AMERICAN ORTHOPTKRA. 263 



P. heydeniana (Saussure), and the closest relationship is undoubt- 

 edly with obscura. The species described from Grenada, P. albi- 

 nervis Brunner, considerably resembles pavonacea, but can be imrae 

 diately distinguished by the much smaller size. 



Size rather large. Head with the interspace between the eyes about half the 

 short diameter of the eye, the interspace between the bases of the antennae equal 

 to the eye dimension ; eyes ovate ; antenna* filiform, considerably exceeding the 

 body in length. Pronotum transverse; anterior and posterior margins slightly 

 produced centrally; lateral margins broadly rounded. Tegmina moderately 

 elongate, subequal in width, the apex narrowly rounded ; basal field narrow, 

 acuminate; costal uervures fourteen in number; discoidal vein with two apical 

 forks; median vein and its accessory rami parallel with the discoidal ; anal field 

 elongate sub-pyriform, containing five uervures, anal sulcus straight for a consid- 

 erable part of the distal section. Wings rather narrow; costal uervures eleven in 

 number; axillary vein with three additional branches. Subgeuital plate acumi- 

 nate. Cerci short, stout, depressed, and acuminate, supplied with long hairs. 

 Anterior tibia? considerably shorter than the femora, spines in two rows; meta. 

 tarsi exceeding the remaining tarsal joints in length. Median tibia? equalling the 

 femora, spines in three rows ; metatarsi half as long again as the remaining tarsal 

 joints. Posterior tibia? considerably exceeding the femora in length, spines in 

 three rows ; metatarsi over twice as long as the remaining articles. 



General color wood brown on a base of pale amber color. Head with antenna? 

 plain wood brown. Pronotum pellucid ; marked with a median outlined lyrate 

 pattern of black, which carries an additional fine curved black line on the 

 anterior external section, connecting the middle of either arm of the central pat- 

 tern with its anterior extremity. Tegmina wood brown, the costal, discoidal 

 and anal field finely lined with pellucid ; a large rounded spot at the base of the 

 discoidal field is similar in character; basal field pellucid. Wings pellucid, the 

 edge of the costal region suffused with smoky brown. Upper surface of the 

 abdomen reddish brown. Ventral surface including limbs pale brownish, the 

 vicinity of the bases of the spines on the limbs darker brown. 



Measurements: 



Length of body, ...... 12.2. mm. 



Length of pronotum, ..... 3. '" 



Width of pronotum, ..... 4.1 



Length of tegmina, ..... 11. " 



Greatest width or tegmina, .... 3. " 



Genus IS* II NOPTER A Burmeister. 



1838. Ischuoptera Burmeister, Handb. der Entomologie, ii, p, 500. Included 

 I. gracilis Burmeister from the Cape of Good Hope, I. fumata Bur- 

 meister from Brazil, and I. morio Burmeister from Colombia.* 



* Brunner (Nouv. Syst. Blatt., p. 136) placed morio as a doubtful synonym of 

 pensylvanica (De Geer), but on examination of Burmeister's description ("nigra, 

 sublurida; elytris apicem versus fusoo-pallidis "), practically nothing is found to 

 warrant such action. 



TRANS. AM. ENT. SOC, XXIX. SEPTEMBER. 1903 



