282 NORTH AMERICAN BLATTIDAE 



Plate IX 



The concealed genital plates and hooks are given as seen from below, the sub- 

 genital plate having been removed. From this aspect the dextral plates naturally 

 appear sinistral, and the sinistral hooks, dextral. 



Fig. I. — Homoeogamia mexicana Burmeister. Jalapa, Vera Cruz, Mexico. 



Male. Concealed dextral genital plates. (Greatly enlarged.) 

 Fig. 2. — Homoeogamia mexicana Burmeister. Jalapa, Vera Cruz, Mexico. Male. 



Concealed sinistral genital hook. (Greatly enlarged.) 

 Fig. 3. — Arcnivaga bolliana (Saussure). Brownsville, Texas. Male. Concealed 



dextral genital plates. (Greatly enlarged.) 

 Fig. 4. — Arcnivaga bolliana (Saussure). Brownsville, Texas. Male. Concealed 



sinistral genital hook. (Greatly enlarged.) 

 Fig. 5. — Arcnivaga bolliana (Saussure). Carrizo Springs, Texas. Female. Dor- 

 sal view. ( X2) 

 Fig. 6. — Arcnivaga rehni new species. San Jose del Cabo, Lower California, 



Mexico. Male. Type. Dorsal view. (X2) 

 Fig. 7. — Arcnivaga rchni new species. San Jose del Cabo, Lower California, 



Mexico. Male. Type. Lateral outline of maxillary palpus. (Much 



enlarged.) 

 Fig. 8. — Arcnivaga rehni new species. San Jose del Cabo, Lower California, 



Mexico. Male. Type. Concealed dextral genital plates. (Greatly 



enlarged.) 

 Fig. 9. — Arcnivaga rehni new species. San Jose del Cabo, Lower California, 



Mexico. Male. Type. Concealed sinistral genital hook. (Greatly 



enlarged.) 

 Fig. ID. — Arcnivaga rehni new species. San Jose del Cabo, Lower California, 



Mexico. Female. Allotype. Dorsal view. (X2) 

 Fig. II. — Arcnivaga erratica Rehn. Hackberry Creek, Brewster County, Texas. 



Male. Concealed dextral genital plates. (Greatly enlarged.) 

 Fig. 12. — Arcnivaga erratica Rehn. Hackberry Creek, Brewster County, Texas. 



Male. Concealed sinistral genital hook. (Greatly enlarged.) 

 Fig. 13. — Arcnivaga erratica Rehn. Georgetown, Texas. Female. Dorsal view. 



(X2) 



Fig. 14. — Arcnivaga a pacha (Saussure). Phoenix, Arizona. Male. Concealed 

 dextral genital plates. (Greatly enlarged.) 



Fig. 15. — Arcnivaga apacha (Saussure). Phoenix, Arizona. Male. Concealed 

 sinistral genital hook. (Greatly enlarged.) 



Fig. 16. — Arcnivaga apacha {?>diUsmYe). Death Valley, California. Female. Dor- 

 sal view. ( X2) 



Fig. 17. — Ercmoblalta siibdiapha?ia (Scudder). Sentinel, Arizona. Male. Lateral 

 outline of maxillary palpus.^ (Much enlarged.) 



8 Characteristic of the genus Eremoblatla. 



