28 THE BLATTIDAE OF PANAMA 



CC. Wings with costal veins clubbed, ulnar vein with few branches, inter- 

 calated triangle present. Dorsal surface of male abdomen specialized. 



D. Interocular space narrow, wrinkled. Ventro-caudal margin of cephalic 

 femora armed (with four and one distal spines). Wings with costal veins 

 very strongly clubbed, intercalated triangle well developed for the group, 

 moderately large, radiate field exceptionally ample. Tegmina and wingS' 

 fully developed in both sexes. (Ventro-cephalic margin of cephalic femora 

 with two, approaching three, heavy distal spines.) 



II. Rhytidometopum new genus 

 DD. Inter-ocular-ocellar area raised and flattened, particularly in male. 

 Ventro-caudal margin of cephalic femora unarmed. Wings with costal 

 veins feebly clubbed, intercalated triangle small, radiate field normal. 

 Tegmina and wings fully developed in male, reduced in female. (Ventro- 

 cephalic margin of cephalic femora with two heavy distal spines.) 



12. Supella Shelf ord 

 BB. Tegmina with discoidal sectors longitudinal. (Wings with intercalated 

 triangle small. Tegmina and wings fully developed in male," fully developed or 

 slightly reduced in female.) 



C. Ventro-cephalic margin of cephalic femora with two heavy distal spines. 

 Tarsal claws specialized. 



D. Size small for group. Ventro-caudal margin of cephalic femora with two 

 and one distal spines. (Dorsal surface of male abdomen unspecialized.) 



13. Cariblatta Hebard 

 DD. Size larger, medium small to large for group. Ventro-caudal margin of 

 cephalic femora with three or more and one distal spines. (Dorsal surface of , <^jrj 

 male abdomen unspecialized or specialized. 39).. 14. Neoblattella Shelford 

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

 Tarsal claws unspecialized. (Dorsal surface of male abdomen highly special- 

 ized.) 16. Blattella Caudell 



Euthlastoblatta compsa^" new species (Plate II, figures 10 and 11.) 



This species represents a group of the present genus, of which we 

 have two additional undescribed Central American species before 

 us, differing from what we may term the Abortiva Group, in the 

 absence of a striking pale transverse band toward the caudal 

 margin of the pronotum and the fact that the most striking male 

 genitalic specialization occurs in the styles. 



Compared with males of E. abortiva (Caudell), those of the 

 present species are found to differ also in the narrower interocular 



2' Except in Carihlatta lutea minima Hebard. 



29 Among the many species of Neoblatlclla, the males of nahua (Saussure) and fraterna 

 (Saussure and Zehntner) alone are known to have the dorsal surface of the abdomen 

 specialized. 



*" From Koix\p7} = neat. 



