106 



PROCEEDINGS OF THE ACADEMY OF 



[Jan., 



Description of Type. — Size medium;-^ form moderately slender; 

 T?urface subglabrous. Head with the greatest width of the eye 

 contained more than one and one-half times in the length of the 

 same; antennae- (in perfect individuals) five times the length of the 

 body. Pronotum with the caudal section of the same equal 

 in width to about two-thirds the length of the disk, transverse 

 V-shaped sulcus placed on the middle of the disk; lateral lobes of the 

 pronotum with the greatest depth contained slightly more than one 

 and one-half times in the dorsal length of the same, cephalic margin 

 of the lateral lobes slightly arcuate, ventro-caudal angle and caudal 

 margin of the lobes moderately arcuate. Tegmina slightly longer 

 than the dorsal length of the pronotum, distal margin obliquely 

 arcuato-truncate, the lateral angle moderately rounded; stridulating 

 vein slightly oblique. Disto-dorsal abdominal segment with a 

 recurved trigonal production which is very deeply V-shaped emar- 



Fig. 22. — Dichopetala brevihastata Morse. Lateral view of type. (X 2.) 



ginate mesad, laterad of which this production is rounded; supra-anal 

 plate trigonal with the apex narrowly truncate; cerci as in castanea 

 in the form of the proximal portion and general curve of the distal 

 section, median tooth slightly less divergent dorsad from the main 

 body of the cercus, distal extremity of the cerci moderately produced, 

 caniniform, l)ut not spiniform; subgenital plate longer than the proxi- 

 mal width, lateral margins moderately rect-convergent for the 

 greater portion of their length, thence briefly subparallel, the width 

 of the subequal portion about half of the broad proximal portion, 

 distal margin wholly V-emarginate, only narrowly rounded lobes re- 

 maining laterad, a very weak medio-longitudinal carina present ven- 

 trad. Cephalic femora proportionately as in castanea. but slightly 

 slenderer. Median femora very slender. Caudal limbs as in castanea. 

 Allotype here Selected : 9 ; Riley's Ranch, Mesilla Valley, Donna 



^' On account of the close relat ionship of this species to caslnnea, only characters 

 :<howing some difference from those of the latter species are here mentioned. 

 2- Imperfect in type. 



