30 NORTH AMERICAN BLATTIDAE 



Immature examples have the buff portions of the pronotum 

 relatively somewhat more extensive than in the adults, while the 

 mesonotum and metanotum are also of this color, broadly mar- 

 gined caudad with the dark brown general coloration of the dorsal 

 surface. In some individuals, the lateral margins of the proximal 

 dorsal abdominal segments, the caudal margins of the last two 

 dorsal abdominal segments, the supra-anal plate and the cerci are 

 also of the paler coloration. Beneath, these examples are usually 

 almost uniform, rather pale brown. 



In the vicinity of Brownsville, the species was found not uncom- 

 mon in rats' nests, Neotoma sp., under the dense tangle of bushy 

 vegetation, palms and vine tangles, growing near the Rio Grande. 

 In this environment, it was also found in the leaves and dry litter 

 on the ground, and one immature example was taken from the 

 dead petiole of a palm, hanging from the tree. 



The species is known only from the material here studied. 



Specimens Examined: i8; 8 males, 3 females and 7 immature males. 



Brownsville, Texas, V, 7, 1907, (H. S. Barber), 3 juv. d^, [U. S. N. M.]. 



Fort Brown, Brownsville, Tex., VIII, 5, 1912, (Hebard; in rats' nests), 6 cf, 

 3 juv. cf , [Hebard Cln.]. 



Piper Plantation, near Brownsville, Tex., VIII, 3, 1912, (Rehn and Hebard; in 

 leaves and dry litter), i (f , 2 9, [A. N. S. P. and Hebard Cln.]. 



Esperanza Ranch, near Brownsville, Tex., VI and VIII, 4, 1904, (C. Schaef- 

 fer), I cf , I 9 type, i juv. d', [Bklyn. Inst.]. 



AGLAOPTERYX ^~ new genus 



The present genus shows type B^^ armament of the ventro- 

 cephalic margin of the cephalic femora, rather strongly deplanate 

 head, widely separated eyes, tegmina with oblique discoidal sec- 

 tors^"^ (these formed by the median \'ein, its branches and the ulnar 

 vein) and dorsal surface of male abdomen not specialized. 



'2 From 07X06? = beautiful and Trrepnf = wing. 



^' As generally understood for the Pseudomopinae; type .\, indicates that the \-entro- 

 cephalic margins of the cephalic femora are armed with a series of spines, all of similar 

 general character; type B, that the series of spines is abruptly contrasted, the more 

 proximal being elongate and heavy, the more distal minute and very slender. 



^■' This can not be observed in A. gemma, due to the reduction of these (organs. The less 

 reduced tegmina of A. diaphana are, howexer, otherwise \cr\ similar antl show clearly 

 this feature. 



