1907.] 



NATURAL SCIENCES OF PHILADELPHIA. 



61 



In addition to the types a male from I'almerlee (Schaeffer) has 

 ■also been examined. 



30, 1905 (C. 



Aretheea sellata n. sp. 



Type: o" ; Palmerlee, Cochise Co., Arizona, July 

 Schaeffer). [Brooklyn Inst. Ai'ts and Sci.] 



Allied to A. constricta Bruner, but differing in the strongly sellate 

 ]5ronotum, the shorter and comparatively broader head, the broader 

 tympanal field with its strongly bisinuate margin, the slightly longer 

 cephalic femora and slightly shorter median femora, and also in the 

 form of the cerci which have a very slightly dorsal curve at the tips. 



Size medium; form very elongate. Head with the mouth cephalad; 

 occiput gently descending to the compressed, slightly elevated and 

 distinctly sulcate fastigium, which, however, is low 

 ventro-cephalad ; facial fastigium trigonal, slightly 

 higher than wide, the borders distinctly marginate; 

 eyes elliptical, quite prominent when viewed dorsad ; 

 antennse elongate, rather heavy in structure for 

 this type of Orthopteron. Pronotum distinctly 

 sellate, the caudal portion (metazona) forming a 

 considerable angle with the prozona, the cephalic 

 margin of which is also slightly elevated when 

 viewed laterad ; when viewed dorsad the cephalic 

 margin is very broadly triangular emarginate, 

 caudal margin semi-oval in outline; prozona much 

 more constricted than the metazona, the prin- 

 cipal sulcus distinct on the lateral lobes; 

 humeral sinus moderately deep, placed well dorsad on the caudo- 

 lateral margins, which are oblique ventrad, the true ventral margin 

 being somewhat sinuate, a moderately distinct arcuate transverse 

 depression extends from one humeral sinus to the 

 other, wholly independent of the depression of 

 the principal sulcus. Tegmina about four-fifths 

 the length of the caudal femora, narrow, costal field 

 roundly expanded proximad, the costal margin 

 evenly arcuate distad, the sutural margin straight, 

 the apex closer to the sutural margin than to 

 the costal and narrowly rounded; tympanum of medium size, the 

 sutiu-al margin strongly bisinuate, the proximal lobe slightly acute- 

 angulate with the apex rounded; lateral margins of the tympanum 

 slightly arcuate; radial vein with three rami all of which reach the 

 sutural margin. Wings exceeding the tegmina. when in repose, by 



Fig. 13. — Aretheea 

 sellata n. sp. Dor- 

 sal view of prono- 

 tum and tympa- 

 nal area of male. 

 (X 4.) 



Fig. 14. — Arethoea 

 scllatan.sp. Single 

 male cercus. (X 

 15.) 



