82 
Psyche 
[April 
TWO NEW MISSISSIPPI ANTS OF THE SUBGENUS 
COLOBOPSIS. 
By M. R. Smith. 
Mississippi State Plant Board, A. & M. College, Mississippi.! 
The subgenus Colohopsis is a division of the genus Cam- 
ponotus. It includes those ants the major workers and females 
of which have anteriorly truncated heads. The truncated area 
may be concave or blunt, in either case the sides are always mar- 
ginate and well defined. The characters mentioned are so dis- 
tinct that one has no difficulty in assigning ants of this type to 
the proper genus. 
The subgenus Colohopsis in North America seems to have 
very few species, most of the known forms having been des- 
cribed by Dr. W. M. Wheeler in a paper published in 1904.i 
In this paper the following species are recorded as occuring in 
North America, namely: Colohopsis impressus Roger, Colohop- 
sis pylartes Wheeler, Colohopsis ahditus var. etiolatus Wheeler. 
Since that time Dr. Wheeler has described and added another 
variety to the known North American forms, this species being 
Colohopsis pylartes var. hunteri. 
Because of the fact that these ants nest in galls, twigs of 
trees and the stems of plants they are seldom taken by collec- 
tors. This partly accounts for the few known forms. Their 
habits are also imperfectly known. 
In Mississippi three distinct species of Colohopsis have been 
taken, two of which are being described as new in this paper. 
The writer would feel somewhat hesitant about describing these 
as new if Dr. Wheeler had not examined the specimens and 
reviewed the descriptions. The third species of Colohopsis 
found in Mississippi is one that can be assigned to C. impressus. 
All three of these forms are very distinct and it is impossible 
iThe American Ants of the Subgenus Colohopsis; Bulletin American Museum Natural 
History Vol. 20, Article 10, pp. 139-158. 
