152 



PROCEEDINGS OF THE ACADEMY OF 



[Jan., 



Figs. 57 and 58. — Ventral outline 

 of subgenital plate of females 

 (allotypes) of Dichopeiala tridac- 

 tyla (57) and D. caudelli (58). 

 (X5.) 



nearly one and one-half times in greatest dorsal length of same, 

 margins of lobes as in male, but the cephalic truncate and not 



emarginate. Tegmina very short, 

 over twice as wide as the apparent 

 length, costal margin arcuate with 

 the distal portion more or less 

 truncate; interspace between teg- 

 mina slightly more than half the 

 width of a single tegmen. Abdo- 

 men somewhat compressed, proximal 

 segments tectate dorsad; supra-anal plate moderately produced, 

 rounded; cerci very short, conic; ovipositor slightly surpassing the 

 length of the median femora, moderately arcuate, more sharply 

 so distad, robust, dorsal mar- 

 gin faintly flattened mesad, 

 distal third of same margin 

 armed with six distinct teeth, 

 increasing in length distad, 

 ventral margin very weakly 

 arcuate except in the distal 

 third where the arcuation is 

 decided, there armed with six 

 to seven short slightly re- 

 curved teeth; subgenital plate 

 divided into two parts, as far as the chitinous structure is concerned, 

 these connected mesad for a third of their length by soft integument, 

 the lateral halves of the plate subovoid-trigonal, the apices bluntly 

 angulate: Cephalic femora about one and two-thirds times the length 

 of the disk of the pronotum. Median femora slightly less than half 

 the length of the caudal femora. "Caudal femora robust (for the 

 genus), considerably inflated. 



Parqtypic Series. — All of the material belonging to this species 

 now before us, in addition to the type and allotype, is considered 

 paratypic — four males, fifteen females. 



Measurements {in millimeters). 



Camacho, Mexico. 



Figs. 59 and 60. — Outline of ovipositor of 

 females (allotypes) of Dichopetala tridac- 

 tyla (59) and D. caudelli (60). (X 4.) 



(Type) 



Length of body 10.8 



Length of pronotum 2.8 



Greatest dorsal width of pronotum 2 . 1 



Average of four 

 paratypic 



11.3(11.2-11.7) 

 3. ( 2.9- 3.1) 

 2.5f 2.5- 2.6) 



