MORGAN HEBARD 65 



stant in size and development of the organs of flight. The speci- 

 men from Taboga Island, however, though of the usual large size 

 shows moderate tegminal and wing reduction (length of tegmen, 

 16; width of tegmen, 5.4 mm.). 



Neoblattella fraterna (Saussure and Zehntner) (Plate III, figure 16.) 



1893. Blatta fraterna Saussure and Zehntner, Biol. Cent. -Am., Orth., i, p. 44. 



[ cf ; Chontalcs, Nicaragua.] 



Gatun, Canal Zone, Panama, IV, 7, 191 1, (Jennings), i cf, i juv. 9 ; VII, 17 to 

 VIII, 22, 1916, (Harrower), 3 cf, 2 juv. cf , 3 juv. 9 , 3 small juv. 



Rio Boqueron, Pan., V, 1907, (Busck), 39. 



Tabernilla, C. Z., Pan., VI, 16 and 25, 1907, (Busck), 1 cf , i 9. 



Cabima, Pan., V, 17 to 20, 191 1, (Busck), 3 9. 



Calidoma Road, Pan., IV, 12, 191 1, (Jennings), 2 juv. 



The present species is a member of the Nahua Group. The 

 young of this insect, which in the adult condition is plainly col- 

 ored, are strikingly and distinctively marked. The pronotum, 

 mesonotum and mctanotum are buffy, with two narrow adjacent 

 medio-longitudinal lines of dark brown, and on each side the 

 broad translucent margins are bordered internally by bands of 

 dark brown, which are slightly narrower than the marginal por- 

 tions, the intervening buffy bands thus formed showing scattered 

 dark brown dots. The dorsal surface of the abdomen is blackish 

 brown, punctate to varying degrees with buffy. 



LOPHOMETOPUM56 new genus 



The present genus shows unquestionable affinity to Neoblattella 

 Shelford in form and general structure, and particularly in the 

 differentiated pulvilli and specialized tarsal claws. Nearest affinity 

 to the Carrikeri Group of that genus is shown. 



From Neoblattella it is possible to separate Lophometopiim by 

 the distinct interocular ridge and the "type B" armament of the 

 ventro-cephalic margins of the cephalic femora. The coloration 

 of the tegmina and wings in the only known species of the genus 

 is of a type previously unknown to us. 



In linear arrangement this genus follows Neoblattella and pre- 

 cedes Blattella Caudcll ; the latter genus is of Old World origin and 

 distantly related. 



5' From X60os = ridge, and ixirwiroi' = (orehea.d. In allusion to the striking transverse 

 ridge between the eyes. 



MEM. ENT. AM. SOC, 4. 



