132 GUATEMALAN BLATTIDAE 



pronotal marking not found in any of the Costa Rican or Pana- 

 manian material we have seen. The caudal margin of the pro- 

 notum between the shoulders is blackish brown, this gradually 

 broadening at the shoulders and then as gradually disappearing. 

 In the female this marking does not broaden at the shoulders. 

 This feature gives to the material a distinctive appearance, but 

 detailed comparison fails to show any other difference from the 

 typical series. It is of interest to note that, between the region 

 in which this material was taken and the previously known 

 distribution of the species, far to the southward, all specimens 

 of the genus we have seen from Nicaragua have represented a 

 distinct species, marmorata of Stoll. 



Blaberus trapezoideus Burmeister 



Guatemala City, 3 cT, 2 9, 1 juv. d^, [Paris Museum and 

 Hebard Cln.]. 



CORYDIINAE 



Holocompsa nitidula (Fabricius) 



Guatemala City, 2 9 , [Paris Museum and Hebard Cln.]. 

 Aguna, Escuintla, 650 meters, 1 9 , [Hebard Cln.]. 



Holocompsa azteca Saussure 



Guatemala City, 1 9 , [Paris Museum]. 



