156 PROCEEDINGS OF THE ACADEMY OF [Jan.^ 



disk mesad, forming a V-shaped figure near the caudal third of the 

 disk; caudal margin of the lateral lobes of the pronotum obliquely 

 subtruncate, ventro-caudal angles of lobes rounded. Tegmina 

 appreciably longer than the dorsum of the pronotum, width of dis- 

 coidal and anal fields slightly less than the length of same; costal 

 margin considerably arcuate, distal margin obliquely arcuato-truncate, 

 sutural margin obtuse-angulate at the extremity of the stridulating. 

 vein, appreciably sinuate distad of the same; discoidal field less 

 sharply expanded than in tridadyla. Cerci with the appendicular 

 lobe straighter tha-n in tridachjla, slightly expanded distad, median 

 tooth short, depressed, when seen from the dorsum with the margin 

 rounded and not acute, acute distal extremity of the shaft of the 

 cercus slightly shorter and more regularly tapering than in tridadyla; 



Fig. 61. — Dichopelala caudelli n. sp. Lateral outline of type (male). (X 3.) 



subgenital plate with distal margin more deeply V-emarginate than in 

 tridadyla, the margins of the excision slightly arcuate, the lateral 

 angles quite acute. Limbs as in tridadyla, but cephalic and median 

 femora very slightly slenderer. 



Allotype: 9 ; Mountains twelve leagues east of San Luis Potosi, 

 state of San Luis Potosi, Mexico. (Palmer.) [Scudder Collection.] 



Description of Allotype. — Differing from the allotype of tridadyla 

 in the characters here described. Form and size as in tridadyla. 

 Head as in tridadyla. Pronotum as in tridadyla, but with the disk 

 broader mesad, the margins (indicated almost wholly by color) very 

 slightly narrowing to the transverse sulcus, thence moderately diverg- 

 ing caudad; caudal margin of disk gently arcuate; transverse 

 sulcus more continuous than in tridadyla, but weak mesad; lateral 

 lobes of the pronotum shallower than in tridadyla, the greatest depth 

 contained nearly twice in the greatest dorsal length of the same, 

 margins similar. Tegmina similar to those of tridadyla. AbdonienL. 

 very similar to that of tridadyla; ovipositor slightly more robust 



