1914.] 



NATURAL SCIENCES OF PHILADELPHIA. 



151 



Figs. 51 and 52. ^Dorsal out- 

 line of head, pronotum and 

 tegmina of males (types) of 

 Dichopetala tridaclyla (51) 

 and D.caudelli (52). (X 3.) 



base of the cerci; cerci trifid, from the 

 dorsal base projects an arcuate subequal 

 blunt digitiforni lobe, which in general 

 follows the curve of the shaft of the 

 cercus'when seen from the dorsum and 

 when viewed from the lateral aspect is 

 subparallel with the same, not quite 

 reaching the apex of the median tooth, 

 latter diverging proximad of the middle, 

 moderately acute, tapering, slightly de- 

 pressed, diverging moderately disto- 

 dorsad, subequal to half the length of the shaft of the cercus distad 

 of the tooth, shaft very robust proximad of the divergence of the 

 tooth, falciform, strongly depressed, triquetrous, margins sharp, 

 apex acute, tapering for a short distance proximad of apex; subgenital 



plate large, cymbiform, moder- 

 ately produced, distal margin 

 broadly and rather deeply 

 V-emarginate, lateral angles 

 moderately acute. Cephalic fe- 

 mora slightly less than half the 

 length of the caudal femora; 

 cephalic tibise with tympanum 

 elliptical. Median femora subequal to one-half the length of the 

 caudal femora. Caudal femora about one and one-half times the 

 length of the body, moderately inflated proximad. 



Allotype : 9 ; data the same as 

 the type. 



Description of Allotype. — Size 

 medium; form robust (for the 

 genus). Head broad, form of 

 occiput and fastigium as in the 

 male, the latter, however, not as 

 compressed; eyes prominent, 

 more ovate than in the male, depth of eye contained about one 

 and one-half times in that of the infra-ocular portion of the gense. 

 Pronotum in general form similar to that of the male, but less 

 sellate, non-depressed mesad; caudal margin of disk subtruncate; 

 lateral margins of disk hardly indicated even caudad; trans- 

 verse sulcus as in male, the median discal remnant of same less 

 distinct and V-shaped ; lateral lobes with greatest depth contained 



Figs. 53 and 54. Outline of left cercus 

 of males (types) of Dichopetala tri- 

 daclyla (53) and D. caudelli (54). 

 (X8.) 



Figs. 55 and 56. — Ventral outline of 

 subgenital plate of males (types) of 

 Dichopetala tridactyla (55) and D. 

 caudelli {5Q). (X 8.) 



