12 NORTH AMERICAN BLATTIDAE 



with blackish brown. Pronotum buffy, disk bordered rather narrowly 

 with blackish brown and with an anchor-shaped marking of this color, 



the arms of which are cephalad Aglaopteryx gemma new species 



DD. Dorsal surface of abdomen with sixth segment specialized and suc- 

 ceeding segments transversely constricted. Pronotum not distinctively 

 and strikingly marked. Ventro-cephalic margin of cephalic femora with 

 three heavy, elongate, distal spines. (Size medium small. Tegmina 

 fully developed, extending beyond apex of abdomen. Styles elongate, 

 heavy, inset, produced and adjacent mesad. General coloration warm 

 buff.) 

 E. Head warm buff, with inter-ocular-ocellar area prout's brown, broken 

 mesad by twin spots of warm buff. Interocular space half that between 

 antennal sockets. Concealed process between styles with distal portion 

 slightly broadening and faintly roughened. 



Latiblattella rehni new species 



EE. Head warm buff, vertex strikingly pale buff, face maculate with 



prout's brown. Interocular space three-quarters that between antennal 



sockets. Concealed process between styles with distal portion enlarged, 



flattening out caudad with margin rounded. 



Latiblattella lucifrons new species 

 CC. Four proximal tarsal joints each bearing a pulvillus. Tegmina with 

 discoidal sector's weakly radiating. 

 D. Sixth dorsal abdominal segment bearing mesad, at specialization of sixth 

 and seventh segments, two minute, chitinous projections, armed dorso- 

 distad with elongate, delicate teeth. Styles not deflexed, of very unequal 

 bulk. (Subgenital plate strongly asymmetrical. Dextral style heavy, 

 cylindrical, curving weakly sinistrad; sinistral style slender, tapering, 

 straight, not half as long as dextral style. General coloration shining black- 

 ish brown. Limbs and spines ochraceous orange.) 



Ischnoptera deropeltiformis (Brunner) 



DD. Dorsal surface of abdomen either specialized or unspecializcd, but 



never showing armed projections or character of specialization found in 



Ischnoptera. Styles slender, deflexed, cylindrical processes, with rounded 



apices, the dextral slightly the longer Parcoblattai^ 



BB. Ventro-cephalic margin of cephalic femora armed with a row of spines 

 which decrease gradually in size and length distad (type A). Four i)roximal 

 tarsal joints each bearing a pulvillus. 

 C. Supra-anal plate not bilobate. Form not depressed. 



D. Structure moderately delicate. Styles variously specialized ; not slender, 

 elongate, straight, symmetrical processes of equal length, situated in sockets 

 on margin of subgenital j^late. 



13 A key to the males of the twelve species of this genus is given on page 174. 



