1914.] 



NATURAL SCIENCES OF PHILADELPHIA. 



133 



Figs. 36 and 37. — Ventral out- 

 line of subgenital plate of 

 males (types) of Dichopetala 

 catinata (36) and D. oreaeca 



(37). (X4.) 



arcuate, tympanum unequally trigonal, anal vein moderately arcuate. 

 Abdomen with the disto-dorsal segment having the distal margin 

 proper sinuato-truncate; supra-anal plate broad, rotundato-trigonal, 

 with folded rounded lateral flaps; cerci with proximal portion moder- 

 ately robust, cylindrical, lobe diverging proximad of the middle of 

 the shaft, expanding into a broad convex structure like an inverted 

 spoon, the dorsal margin arcuato-truncate, 

 ventral margin considerably arcuate and 

 with a distinct marginal longitudinal cin- 

 gulum, apex rather narrowly rounded, 

 whole lobe directed dorso-mesad, re- 

 mainder of shaft acute, tapering, acicu- 

 late, triquetrous in section, arcuate, lying 

 under tha lobe and following the same 

 general curve; subgenital plate rather ample, distal half with lateral 

 margins moderately converging, thence straight and subparallel to the 

 tips, distal margin nearly rectangulate emarginate, the lateral angles 

 moderately acute, the ventral surface with a distal medio-longitudinal 

 carina. Cephalic femora about one and two-thirds times as long 

 as the length of the head and pronotum together; cephalic tibiae 

 with the foramina elongate elliptical. Median femora subequal to 

 the median pair in length. Caudal femora slightly more than twice 

 the length of the cephalic femora, moderately inflated proximad. 



AUohjpe: 9 ; Moss Well, Chisos Mountains, Brewster Co., 

 Texas. Elev. 4,700 feet. September 5-8, 1912. (Rehn and Heb- 

 ard.) [Hebard Collection.] 



Description of Allotype. — ^The following characters are those of 

 difference from the male sex. Form rather robust. Antennse about 

 twice the length of the body. Pronotum not at all sellate, the 

 dorsal line nearly straight when seen from the side; median width 

 of the disk proportionately greater than in the male ; lateral margins 

 of the disk indicated almost wholly by color; cephalic and caudal 



margins of the disk as in the male; 

 lateral lobes as in the male except 

 that the ventral margin is subsinuate. 

 Tegmina lateral, very small, rotundate, 

 distal margin slightly flattened, inter- 



T-- oo J on T-w I ii- space between the tegmina subequal to 

 Figs. 38 and 39. — Dorsal outline ^ ° '■ 



of head, pronotum, and teg- width of a single tegmen. Disto-dorsal 



mina of females (allotypes) of abdominal segment with the distal 



Uic/iopelala oreieca (38) and " 



D. catinata {39). (X "-M margin subarcuate, arcuato-emarginate 



