206 GENUS ARENIVAGA (bLATTIDAE) 



In addition to the type and allotype, the following material 

 is before us: 



San Lorenzo, Coahuila, Mexico, (E. Palmer), 3 9, pnrnltjpcs, [Hebard 

 Cln. and A. N. S. P.]. 



Kits Peak Rincon, Baboquivari Mountains, Arizona, about 4050 feet, 

 viii, 1 to 4, 1916, (Lutz and Rehn), 2 d^, [A. M. N. H. and A. N. S. P.]. 



Arenivaga floridensis Caudell (Text figure 2 and plate VII, figure 5) 

 1908. Arenivaga floridensis Caudell, Proc. Ent. Soc. Washington, xx, p. 156. 

 [cf , 9 ; Dunedin and Auburndale, Florida.] 



This species, remarkable for its broad form, particularly in 

 the male sex, dark coloration and distinctive male concealed 

 genitalia, is the only representative of the genus known from 

 the humid eastern portion of the United States. 



In linear arrangement we place it after 

 grata here described, and before erratica 

 Rehn. This insect is a member of the 

 Erratica Group, the species of which agree 

 in the type of the concealed sinistral male 

 genital hook, which is barbed like a fish-hook 

 distad. To this group belong four other 

 species, of which tonkawa is more closely 

 related to erratica and geniialis to apacha. 



A single male, taken by Wm. T. Davis 



at Lakeland, Florida, May 4, 1912, is in the 



^ Hebard Collection.''* Like the type, this 



\ ^ specimen is broad, very dark, blackish 



^^ij'-' chestnut brown in general coloration, with 



Figure 2. Arenivaga gp^ce between the eyes barely narrower 



jtoTK ensis au e . ^.j^j^j^ ^]^j^^ between the ocelli. The dis- 



Dorsal view ot male. . . • i i 



Lakeland, Florida. (X 3) tmctive dextral genital plates are here 



figured for the first time. Length of body, 



14.5 nun. ; length of pronotum, 4.7 ; width of pronotum, 7.7 ; length 



of tcgmen, 15; greatest width of tegnien (meso-distad) , 6.G. 



The species is known only from the three localities in central- 

 western Florida noted above. It is apparently a spring form, 

 which would account for our not having found the species in the 

 fall, dui'ing which season wc; have done extensive field work in 

 the region fiom which it is known. 



'■* Mr. Davis' great generosity in presenting this fine specimen, wliicli was 

 uni(|uc in his own excellent collection, is most deeply apprcciatcid. 



