62 PROCEEDINGS OF THE ACADEMY OF [Feb.y, 



nearly the length of the median femora. Limbs very slender. Ceph- 

 alic femora slightly more than twice the length of the pronotum, the, 

 tibiae distinctly but not greatly exceeding the femora. Median femora 

 about two-thirds the length of the tegmina, the tibise exceeding the 

 femora by about the same distance as in the cephalic limbs. Caudal 

 femora about three times as long as the head and pronotum together, 

 the inflation about limited to the proximal two-fifths; tibise distinctly 

 exceeding the femora in length, all margins spined, the dorsal more 

 strongly so than the ventral. Abdomen subtectate; terminal dorsal 

 segment truncate; cerci tapering, comparatively stout in the proximal 

 half, the apex sharp and rather strongly curved ; subgenital plate pro- 

 duced, the apex narrowed and arcuate-emarginate, supplied laterad 

 with distinct, rather sharp styliform processes of moderate length. 



General color pale apple green, rather whitish ventrad. Head with 

 the eyes prout's brown; antennae beyond the proximal joint yellowish; 

 narrow postocular stripe Indian purple, flanked ventrad with a green- 

 ish-white line of equal width. Pronotum with the prozona bearing 

 two converging greenish-white lines, between which the disk is punc- 

 tate with purplish, the metazona margined with greenish-white and 

 bordered internally with a purplish line, the white margin very broad 

 on the lateral lobes. Tympanum of the tegmina purplish-brown, the 

 veins yellowish as well as the sinuate margin; sutiu-al margin washed 

 with purplish-brown. Abdomen with an arcuate lateral greenish- 

 white line distinctly margined with purple ventrad, the dorsum of the 

 abdomen uniform punctate with the same color; extreme apex of the 

 cerci blackish. Limbs faintly washed with purplish-red. 



Measurements. 



Length of body, 16 mm. 



Length of pronotum, 4 '' 



Greatest width of pronotum 3.5 " 



Length of tegmen, 20.5 " 



Greatest width of tegmen, 2.8 " 



Greatest width of tympanum, 2.7 " 



Length of wnng beyond closed tegmen, 1L8 " 



Length of cephalic femur, 9.5 " 



Length of median femur, 12.5 



Length of caudal femur, 25 " 



Length of caudal tibia, 27 " 



The type is the only specimen of this interesting species examined by 

 the author. 



The five species of the genus Arethcca which have been examined by 



