248 
Psyche 
[September 
Atropos Group. It is of interest that in occasional specimens of B. 
discoidalis (Atropos Group) the anterior elevations on the left side 
are so poorly developed (Fig. 184) that the lateral swelling of Lad 
resembles the outgrowth in the Giganteus Group. 
In Princis’ (1963) linear arrangement of 14 Blaberus spp., the 
species minor is separated from other members of the Brasilianus 
Group by boliviensis and atropos. I would rearrange this sequence 
and place minor with brasilianus , fusiformis ? and scutatus. 
Table 1. Geographical distribution of species of B’aberus. 
Species 
Distribution a 
Giganteus Group 
craniifer 
Mexico, Guatemala, British Honduras, Honduras, 
Costa Rica, Panama, Venezuela, Cuba, Dominican 
Republic, Florida (Key West) 
giganteus 
Mexico, Guatemala, Panama, Colombia, Venezuela, 
Trinidad, British Guiana, Surinam, French Guiana, 
Dominican Republic (?) 
Brasilianus Group 
brasilianus 
Brazil 
colosseus c 
Trinidad 13 , Mexico 13 , Guatemala, Costa Rica, Panama, 
Venezuela 13 , French Guiana 
fusiformis 
Brazil, Bolivia, Paraguay, Argentina 
minor 
Brazil, Bolivia, Paraguay, Argentina 
scutatus 
Brazil, Peru 
Atropos Group 
anisitsi 
Paraguay 
atropos 
Trinidad, British Guiana, Chile (?), Colombia 13 , 
Mexico 13 
boliviensis 
Bolivia, Ecuador d 
discoidalis 
Costa Rica b , Dominican Republic 13 , Jamaica, Cuba, 
Haiti, Vieques Island, Panama, Colombia, Venezuela, 
Trinidad, Ecuador* 5 , Nicaragua 13 , Florida (near Key 
West)*' 
parabolicus 
Colombia, Surinam, Brazil, Peru, Ecuador, Bolivia 
a From Princis (1963) unless otherwise indicated; the localities for craniifer 
include those for trapezoideus . 
b From present study. 
c Localities from Hebard (1920). 
d From Princis (1952). 
e Princis lists Ecuador with a ?. I have seen 1 specimen (Fig. 189) from 
Ecuador. 
f From A. B. Gurney (personal communication). (Record of USNM and 
Fla. Plant Board). 
