216 GENUS ARENIVAGA (bLATTIDAE) 



Explanation of Figures 

 Plate VII 



All of the figures are greatly enlarged. Though the type is constant, 

 the general form of the dextral concealed male genitalic plates is subject 

 to some individual variation within each species. The character of such 

 individual variation is shown by figures 3 and 4, 6 and 7,^- 8 and 9, 10 and 11. 



Dextral concealed male genitalic ylates^'-^ 



Fig. 1 — Arenimga holliana (Saussure). Carrizo Springs, Texas. 



Fig. 2 — Arenivaga rchni Hebard. San Jose del Cabo, Lower California. 

 Mexico. Ti/pe. 



Fig. 3 — Arenivaga grata new species. San Lorenzo, Coahuila, Mexico. 

 Type. 



Fig. 4 — Arenivaga grata new s])ecies. Kits Peak Rincon, Baboquivari 

 Mountains, Arizona. 



Fig. 5 — Arenivaga jloridensis Caudcll. Lakeland, Florida. 



Fig. 6 — Arenivaga erratica Rehn. Prescott, Arizona. Paratijpe. 



Fig. 7 — Arenivaga erratica Rehn. Fort Grant, Arizona. (See footnote 22.) 



Fig. 8 — Arenivaga tontiawa new species. Carrizo Springs, Texas. Type. 



Fig. 9 — Arenivaga tonkawa new species. Carrizo Springs, Texas. Para- 

 type. 



Fig. 10 — Arenivaga apacha (Saussure). Santa Rita Mountains, Arizona. 



Fig. 11 — Arenivaga apacha (Saussure). Prescott, Arizona. 



Fig. 12 — Arenivaga genitalis Caudell. Phoenix, Arizona. Topotypc. 



Sinistral concealed male (jenital hook 



Fig. 13 — Arenivaga holliana (Saussure). Carrizo Springs, Texas. This 

 type is developed also in rehni and grata. It is characteristic of the Bolliana 

 Group. 



Fig. 14 — Arenivaga erratica Rehn. Prescott, Arizona. Paratype. This 

 type is developed also in fioridensis, tonkawa, apacha and genitalis. It is 

 (characteristic of the Erratica Group. 



" This figure shows, in addition, the chitinous finger which springs from a 

 point adjacent to the sinistro-basal jwrtion of the dextro-dorsal jilate, and 

 is normally concealed by the soft integument which lies sinistrad in the anal 

 chaml)er. In the specimen figured, as well as in a few others before us, this 

 finger is i)artially, though not wholly, visible wlien the subgenital plate has 

 been removed. In three Californian males at hand, however, it is more 

 slender and wholly exi)o.scd. 



■•'■■' As they appear without furUu;r dissection than the removal of the sub- 

 genital plate. 



