1921] NATURAL SCIENCES OF PHILADELPHIA. 229 



in the inner portion of the area concealed when at rest, the distal 

 veins and veinlets more strongly defined in mummy brown. Wings 

 transparent, faintly tinged with mummy brown, this heavier distad 

 and in area of costal veins; clubbed portions of costal veins opaque, 

 mummy l^rown. Mesonotum and metanotum prouts brown with 

 a medio-longitudinal line of whitish, which on each segment expands 

 caudad. Dorsal surface of abdomen clear cinnamon-buff, each seg- 

 ment very heavily suffused with mummy brown lateral. Underparts 

 clear cinnamon-buff, suffused with prouts brown laterad; abdomen 

 with flecks of this color laterad and with a medio-longitudinal suf- 

 fusion of blackish brown, which expands caudad to include the 

 entire subgenital plate. 



Length of body 13.8, length of pronotum 3.3, width of pronotum 

 4.8, length of tegmen 16.2, width of tegmen 4.9, length of wing 14.8, 

 width of wing 8.7, width of intercalated triangle 1.8, length of 

 tibia 6.2, length of caudal metatarsus 2.9 mm. 



The type of this remarkable species is unique. 



Neoblattella platystylata new species. Plate IX, flgiu-es 21, 22 and 23; Plate X, figure 1. 



Closely related to A"^. conspersa (Brunner), the present species 

 agrees in general structure, minute and scattered tegminal dots and 

 general character of specialization of the subgenital plate in both 

 sexes, (figured for conspersa, plate IX, figure 20). 



The stjdes of the male subgenital plate are much heavier, decid- 

 edly broader than long, while the production of the meso-caudal 

 portion of that plate is much more sudden and pronounced, form- 

 ing there a stout projection. 



The female subgenital plate is specialized very much as described 

 for conspersa on page 261; the inner projections, however, usually 

 produced in but one or two stout spines. 



Though the dark marking of the ventral surface of the abdomen 

 is carried out broadly to the extremity of the subgenital plate in 

 all of the males, the majority of the females have this marking 

 narrower and in individuals of extreme recessive coloration it is 

 greatly reduced, not reaching as far as the base of the subgenital 

 plate. 



As in conspersa, the number and intensity of the dark scattered 

 tegminal dots is individually variable, as is the usually conspicuous 

 pale band below the dark interocular band on the head. 



Type: d^ ; Igarape-Assu, Para, Brazil. (H. S. Parish.) [Acad. 

 Nat. Sci. Phila., Type no. 5376.] 



Size medium small for the genus, slightly larger than the average 

 for conspersa from the same region, form moderately slender. In- 



