44 NORTH AMERICAN BLATTIDAE 



Type. — c/^ ; Santa Rita Alountains, Arizona. Elevation 5000 to 

 8000 feet. July. (F. H. Snow.) [University of Kansas Collec- 

 tion.] 



Description of Type. — Size medium, form moderately broad. Head with inter- 

 ocular space fully three-quarters that between antennal sockets; inter-ocular-ocellar 

 area distinctly flattened; ocellar spots moderately distinct; very small circular 

 areas with surfaces very feebly convex are apparent meso-ventrad and adjacent 

 to antennal sockets. Maxillary palpi with distal joint large, in length not quite 

 equal to penultimate joint, which is shorter than third joint in relatively greater 

 ratio. Pronotum as in rehni. Tegmina and wings much as in that species, the 

 wings, however, with veins slightly paler. Abdomen with proximal dorsal seg- 

 ments unspecialized; sixth with a semicircular depression mesad, even deeper and 

 more sharply defined than in rehni, fringe of hairs cephalad similar, but with hairs 

 on dorso-cephalic face of knob decidedly shorter, agglutinated and parting from a 

 medio-longitudinal line, caudad of the knob the segment is subchitinous as in rehni, 

 but with margin convex, feebly produced, showing very slight emarginations at the 

 latero-caudal bases of the knob, latero-caudal margins of this segment weakly sub- 

 rectangulate produced with apex bluntly rounded; succeeding segments decidedly 

 constricted, decidedly narrower in transverse section, brief exposed portions of 

 seventh and eighth segments very delicate in structure. Supra-anal plate trans- 

 verse, weakly triangularly produced with apex weakly bilobate. Ventro-mesad, 

 within the anal chamber, a soft integument projects from base of subgenital plate, 

 with filaments converging distad and terminating in an acute-angulate projection 

 with apex rounded, soft, except narrowly along its dextral margin where it is chiti- 

 nous, the lateral margin of this chitinous section being thickly supplied with minute, 

 microscopic, chitinous spines, directed cephalo-laterad. Above this integument, a 

 similar but more slender, soft integument extends farther caudad, above from this 

 mantle springs an elongate, spiral, chitinous thorn, longer than the analogous thorn 

 in rehni, directed caudad. Subgenital plate not large, somewhat asymmetrical; the 

 disto-mesal section of this plate is produced, directed upward, its margin roughly 

 rotundato-angulate on each side and slightly more produced sinistrad; the mesal 

 portion of the plate is deeply cleft on each side toward its mesal section, the lateral 

 sections thus formed being produced mesad over the mesal section in two slender, 

 flattened projections (the styles), while within from the base of the sinistral process 

 a more strongly chitinous, cylindrical process is directed perpendicularly dorsad, 

 with enlarged apex flattening out caudad with margins rounded, its flattened dorsal 

 surface on a level with the slender projecting apices of the lateral processes. Limbs 

 and armament of same as given in generic description. 



Allotype. — 9 ; same data as type. [University of Kansas Col- 

 lection.] 



Description of Allotype. — Agrees with male except in the following features. F"orm 

 much broader. Head with interocular space wider, fully four-fifths as wide as 



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