so PROCEEDINGS OF THE ACADEMY OF [Jan., 



ventro-caudal angle very broadly rotundate, ventral margin slightlj' 

 arcuato-emarginate. Tegmina with their exposed length about 

 three-fourtjis that of the dorsum of the pronotum, broad, the greatest 

 width slightly exceeding the length of the same, the general form 

 subquadrate ; marginal field regularly narrowing distad, distal 

 extremity broadly arcuato-truncate, disto-costal angle narrowly 

 rounded, sutural margin with the proximal angle distinct, subrect, 

 thence the margin is obliquely biundulate to the distal margin; 

 texture of the tegmina coriaceous, the principal veins poorly indicated, 

 interstices obscurely and irregularly reticulate, stridulating vein 

 strongly indicated. Disto-dorsal abdominal segment transverse, a 

 rectangular depressed area present mesad; supra-anal plate trans- 

 verse trigonal, the apex distinctly produced in a short slightly 

 upturned acute process; cerci simple, depressed, falciform, the 

 proximal third moderately broad, slightly lamellate laterad, dis- 

 tinctly tapering from the proximal third, the internal margin regularly 

 arcuate, the external one with a rounded angle where the proximal 



Fig. 4. — Dichopetala f ale at a n. sp. Fig. 5.—Dichopetala falicata n. sp. 

 - Outline of apex of abdomen of type Outline of ovipositor of allotype, 



seen from the dorsum. (X 3.) (X 2.) 



lamellation disappears, the form of the whole cercus appearing 

 bent-arcuate in consequence, apex acute; subgenital plate broad, 

 short, narrowing distad, the apex very narrowly subtruncate. 

 Cephalic femora about one and one-half times the length of the 

 dorsum of the pronotum. Median femora nearl}^ twice the length of 

 the pronotum. Caudal femora with their length not greatly inferior 

 to that of the body, distinctly but not greatly inflated proximad, 

 ventral margins unarmed, genicular lobes very weakly or not at all 

 spined; caudal tibias distinctly but not greatly exceeding the femora 

 in length, dorsal spines more numerous than the ventral ones. 

 Allotype: 9 ; Tepic, Mexico. (Eisen.) [Hebard Collection.] 

 Description of Allotype.- — Differing from the type in the following 

 characters: Pronotum with the dorsal length slightly greater than 

 the greatest ventral width across the lobes, median constriction 

 extremely slight, hardly evident, cephalic margin emarginato- 

 truncate, caudal margin truncate. Tegmina shorter, their exposed 

 length no greater than half of the pronotal length, decidedly broader 



