6 
IOWA STUDIES IN NATURAL HISTORY 
series of specimens from St. Vincent (E. O. Hovey), Bridge- 
town, Barbados (Wheeler), Castries, St. Lucia (E. O. Lutz, 
Wheeler, J. C. Bradley); Dominica (Lutz, Wheeler), Fort 
de France, Martinique (Forel, Wheeler) ; San Lorenzo, San- 
chez and San Francisco Mts., Santo Domingo (Busck) ; Cor- 
rozal, Panama (Wheeler) ; Nicaragua (W. Fluck), ete. I be- 
lieve that Emery is right in treating C. bimaculatus F. Smith 
aS a mere synonym of sexguttatus (typ.). There is consider- 
able variation in the maculation of the gaster in workers 
from the same colony, and in minor individuals the spots are 
usually developed only on the second segment. The type of 
bimaculatus is from St. Vincent. What Forel has designated 
as var. bimaculatus from Brazil and Paraguay is, in my 
opinion, var. fusciceps Emery, which is not known to oceur 
in the West Indies, though I have specimens of it from 
Kaieteur, British Guiana (F. E. Lutz). I received numer- 
ous workers, females and males from Fiebrig, who collected 
them on the Parana River, Paraguay. It is probably a part 
of this series which was identified as bimaculatus by Forel. 
The var. fusciceps, however, has the head of the female and 
major worker black with its anterior portion and the man- 
dibles dark brown or eastaneous, and not yellowish red as in 
the West Indian form described by Smith. 
Camponotus sexguttatus var. grenadensis Forel.—This variety 
was originally described from the island of Grenada, but 
Forel found it also in Barbados and it has been taken in the 
same locality by Jeffreys and Stoner. I have specimens of 
all three phases taken in Grenada by Professors Roland Thax- 
ter and C. T. Brues. The variety is easily recognized by its 
color, the head, thorax and petiole of the worker and female 
being light yellowish red. The paired ivory-colored spots on 
the black or dark brown gaster are well-developed. The 
wings of the female are more yellowish and the pterostigma 
paler than in the typical sexguttatus. The male is dark brown 
with the dorsal surface of the head and thorax and the arti- 
culations of the legs and gaster testaceous. As in other 
varieties the second gastric segment has a couple of narrow 
transverse, pale spots at its base. The wings are scarcely 
paler than in the male of the typical form. 
