26 THE BLATTIDAE OF PANAMA 



Subfamily PSEUDOMOPINAE 

 A Key to the Described America^i Genera Belonging to the Group 



Blattellites 

 A. Ventro-cephalic margin of cephalic femora with a row of spines which decrease 

 suddenly in size mesad, those distal being piliform; or armed with a row of spines 

 which are entirely piliform. ^^ 



B. Tarsal claws unspecialized. I nterociilar space showing no ridge. 



C. Pulvilli and arolia absent. (Limbs stout. Ventro-cephalic margin of 

 cephalic femora with a row of piliform spines, with two heavy distal spines. 

 Tegmina with discoidal sectors oblique. '^ Dorsal surface of male abdomen 

 specialized. Wings with costal veins very weakly clubbed, ulnar vein with 

 branches extremely distal or lacking, intercalated triangle very small.) 



2. Ceratinoptera Brunner 

 CC. Pulvilli and arolia present. 



D. Pulvilli on fourth tarsal joint only. Ventro-cephalic margin of cephalic 



femora with two heavy distal spines. (Tegmina with discoidal sectors 



oblique.23 Wings with costal veins clubbed, intercalated triangle very small.) 



E. Dorsal surface of male abdomen unspecialized. Ventro-cephalic 



margin of cephalic femora with a row of heavy proximal spines, succeeded 



by a row of minute piliform spines. 



F. Limbs slender. Tegmina and wings fully developed. 



I. Euthlastoblatta Hebard 

 FF. Limbs stout. Tegmina and wings reduced. (Male concealed 



genitalia not highly specialized) 4. Aglaopteryx Hebard 



EE. Dorsal surface of male abdomen specialized. Ventro-cephalic margin 

 of cephalic femora armed with a row of minute piliform spines.^* (Limbs 

 slender. Interocular space very narrow. Head strongly deplanate. 

 Tegmina and wings fully developed in male, moderately reduced in 



female.) 3. Dendroblatta Rehn 



DD. Pulvilli on all four proximal tarsal joints. Ventro-cephalic margin of 

 cephalic femora with three heavy distal spines. (Ventro-cephalic margin of 

 cephalic femora with a row of heavy proximal spines, succeeded by a row of 

 minute piliform spines.) 



E. Tarsal claws symmetrical. 



F. Tegmina with discoidal sectors decidedly oblique. Dorsal surface of 

 male abdomen specialized. (Wings with costal veins very briefly and 



'' In this type there is evidence to show that some, if not all, of the species have had 

 the heavy proximal spines lost through atrophy. 



'^ Individual reduction in the tegmina of the species of this genus frequently results in 

 the obliteration of the discoidal sectos. 



'^ In the %cnu?, A glaopteryx material is found with tegmina so reduced that the discoidal 

 sectors are frequently obliterated. 



^ Variable in this feature. Individually armed with very few or no heavy proximal 

 spines. 



