MORGAN HEBARD 217 



Inward production of sinistro-basal portion of dextro-ventrol 

 concealed male gen italic plate-^ 



Fig. 15 — Arenivaga npacha (Saussure). Kits Peak Rincoii, Baboquivari 

 Mountains, Arizona. 



Fig. 16 — Arenivaga genitalis Caudell. Lowell Ranger .Station, Pima 

 County, Arizona. 



Fig. 17 — -Arenivaga genitalis Caudell. Lowell Ranger Station, Pima 

 County, Arizona.-^ 



'* These portions can not be examined without dissecting out completely 

 the genitalic plates. This we have not done for the majority of species 

 considered, as we feel that sufficient features are revealed by simi)ly removing 

 the subgenital plate and that further injury to the material is unnecessary 

 for specific diagnostic purposes. 



-^ This is the obverse aspect of the production shown in figure 16, it is 

 from this side only that we are able to see the teeth, homologous to those 

 shown for apacha in figure 1.5. 



TRANS AM. ENT. SOC, XLVI. 



